airplane propeller in action

The propeller of an aircraft is a crucial component that contributes to flight. A propeller provides the thrust needed to maintain a forward direction. It maintains a rotary motion in which it creates a difference in air pressure between the front and back surfaces of its blades. The shape of the blade contributes to the pressure difference and air displacement. The rotary motion allows the blades to do their job. Most propellers require an engines assistance to spin.

There are several things to consider when operating an aircraft with a propeller. First off is the angle of attack. This is the angle a wing is positioned in oncoming airflow. The pitch angle is also something to consider. This refers to the angle a propeller blade produces with its rotational plane. A controllable-pitch propeller allows the pilot to manually alter the pitch of the blades during flight, enabling it to have peak performance. A combination of the proper angle of attack and pitch angle results in an exceptionally smooth flight.

Prolonging the longevity of your propeller can be achieved with proper maintenance, preflight inspections, and routine servicing. If a pilot is able to notice an issue early on, they can circumvent a hefty repair bill later. One tip is to clean the aircraft propeller post flight to ensure that any buildup will not cause corrosion, which can lead to damage. Also, apply oil daily if it is stationed in a salty coastal environment. Internal corrosion is a leading cause of major malfunctions in propellers.

Every single propeller has a recommended overhaul interval based on total flight hours and calendar time that has surpassed. Service is needed after approximately 2,000 flight hours or every 5 years for aircrafts that don’t fly regularly. If your engine needs repair before your propeller does, it can be advantageous to replace both at the same time.

Regular balance checks on your propeller can also help increase the life of your aircraft engine, save costs in repairs, and improve the overall performance of the aircraft. Anytime you replace or remove your propeller you should have it dynamically balanced. Another sign that a balance is needed is if your plane vibrates excessively. Keep in mind that having your propeller balanced will not help disguise other engine issues.

Replacing your propeller with a new one results in improved takeoff and climb, quieter flights, a gain in ground clearance, and a much more satisfactory experience.

At Aerospace Orbit, owned and operated by ASAP Semiconductor, we can help you find all the propeller parts for the aerospace, civil aviation, and defense industries. We’re always available and ready to help you find all the parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@aerospaceorbit.com or call us at +1-509-449-7700.


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Aircraft Propeller Blade Working and Applications

The propeller system is the earliest thrust generator designed for fully powered aircraft flight. Though they have evolved quite a bit since their first operation by the Wright brothers in 1903, propellers utilize essentially the same principles of motion. Let’s take a look at how they work.

At its most fundamental level, a propeller needs to generate thrust to create upward and forward motion. As a whole, it is a device with twisted blades that are pointed at an angle and extend from a hub that is rotated via the power of an engine or motor.  A propeller blade has the capacity to create lift by altering the direction of air that comes into contact with it. This process is representative of Newton’s third law of motion or law of action and reaction. The force of air flow applied to a propeller blade has the potential to create levels of both drag and lift. Lift, by definition, acts perpendicular to the motion of a fluid. Drag applies force in the same direction as fluid movement.

Manipulation of airflow depends on the conservation of momentum, mass, and energy within the propeller system. Air moves as a fluid— it has the ability to redistribute its mass freely while conserving momentum and energy. When airflow interacts with a propeller blade, any change in velocity in one direction can cause a change in velocity in a perpendicular direction.

Propeller blades need to create uniform lift across their length. However, a propeller blade rotates at a lower speed near its hub, and at a higher speed at its tips. This means that the blade tips are traveling a greater distance in the same amount of time as the blade root. The blade must, therefore, account for the difference in speed by incorporating different angles of attack. Propeller blades are designed with a “twist”— they integrate a low angle near their fast-moving tip, and a high angle of attack at the root, ensuring that lift occurs evenly regardless of RPM. Pitch helps adjust the angle of attack along the propeller blade. It is steeper where a blade is moving more slowly (near the hub) and shallow where a blade is moving faster (tip), allowing for differing angles of attack along the length of the blade.

In order to accelerate air downward to create lift, each propeller blade is shaped like an airfoil. Aerofoil stall, or loss of lift, is prevented by the shape of the blade itself. A propeller blade is usually cambered, just like an airfoil wing. Camber, in this instance, refers to the characteristics of the curve of an airfoil's upper and lower surfaces around the blade and the difference in pressure between the two. A pilot, or engineer, can alter the efficiency of a propeller blade by adjusting the pitch.

At Aerospace Orbit, owned and operated by ASAP Semiconductor, we can help you find the jet engine parts and assemblies you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@aerospaceorbit.com or call us at +1-509-449-7700.


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One of the many circuit protection devices

 "If I told you half the things I've heard about this Jabba the Hutt, you'd probably short circuit." Since you’re here, these words said to R2D2 in the film Return of the Jedi are probably not the first time you’ve heard of a short circuit. A short circuit is one of the many issues electronic and electrical protection devices are designed to prevent. 

Let’s talk basics. A protection device simply has two main functions: consistency in regulation, and protection of electrical and electronic circuits. At their most basic, protection devices redirect a power supply into a separate circuit, using overcurrent protection. This allows the device to prevent damage to an existing circuit from excessive voltages and currents. Protection devices also may serve as a safeguard to remove the risk of fire hazard and electrocution. Now that we’re caught up on what exactly a protection device is, let’s cover the most common designs that you might come across and when you might encounter them.

1. Circuit Breaker

  • What is it?
    • Electrical switch
    • Stops a current when there is excess voltage, or when a system failure occurs
  • When is it used?
  • Utilized to protect against an electrical short circuit
    • Useful on both high current and low current circuits 

2.Fuse

  • What is it?
    • Electronic device
    • Metal strip that has the capability to liquify when current flow is too high
    • Categorized by intended application, response time, and breaking
    • When is it used?
    • In systems where protection is needed without a large disruption

3.  Poly Switch (Multifuse/Polyfuse)

  • What is it?
    • Passive electrical device
    • Protects from over current errors
    • Operates as a resettable fuse
  • When is it used?
    • Commonly used on mechanical transforms, computer power supplies, and nuclear or aerospace applications

4.   Residual Current Circuit Breaker (RCCB/RCD)

  • What is it?
    • Electronic device
    • Testable & resettable
    • Shut-off capability - will identify an issue in power supply, and shut off within a short period
    • Does not protect against overload of a circuit
  • When is it used?
    • Home power supply

5.   Surge Protection Device

  • What is it?
    • Electrical device
    • Most common protection unit for over-voltage protection
    • Well organized mechanism
    • Can be used in most stages of a system
  • When is it used?
    • Electrical fitting security systems

6. Metal Oxide Variable Resistor/Voltage Dependent Resistor (VDR)

  • What is it?
    • Electronic device
    • Resistance varies based on incoming voltage
  • When is it used?
    • Applicable with electrical circuits that are vulnerable to electrostatic discharge and/or lighting

7. Gas Discharge Tube/Expulsion Lamps

  • What is it?
    • Electrical device
    • Gas filled tube - electrodes are contained within the gas, and held in an insulated, temperature resistant capsule
    • Able to ionize gas using incoming voltage

  • When is it used?
    • Switching device for electrical protection
    • Lightning protection

8. Inrush Current Limiter

  • What is it?
    • Electrical device
    • Stops inrush current before it reaches circuit breakers and fuses to reduce potential damage
    • High resistance capability
    • Heat protection allows flow of current on a regular basis
    • When is it used?
    • Fixed resistors
    • NTC Thermistors

At Aerospace Orbit, owned and operated by ASAP Semiconductor, we can help you find all the circuits and fuse parts and assemblies you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@aerospaceorbit.com or call us at +1-509-449-7700.


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heat exchanger

Heat exchangers are used to transfer heat from one source to another. Thermal energy is transferred from one source to another without water and gas coming into contact with each other. These heat exchangers are commonly used in a variety of aircraft components. In aviation, flat tube and plate-fin heat exchangers are the most commonly used in aviation. These components must be properly cleaned in order to function smoothly.

Because they will be used at high altitudes, temperature, air density, and pressure resistance all need to be taken into consideration. The fan used in the heat exchanger must also be carefully selected since more airflow is required to remove heat in higher altitudes where air density is much lower.

Liquid cooling tends to perform better than air cooling alone. Liquid cooling is also quieter and less vulnerable to the problems associated with high altitudes. It requires less power and weighs less because there is no need for a large fan or wide spacing.

Plate-fin heat exchangers use plates and finned chambers in order to transfer heat. They can be used for air-to-air, air-to-liquid, or liquid-to-liquid cooling. Considering their weight, this type of heat exchanger performs very well.

Flat tube heat exchangers consist of several flat tubes that are vacuum-brazed in between. These tend to be less expensive than plate-fin designs.

There are high standards when it comes to cleaning heat exchangers. This is due to all the strict and stringent safety requirements that govern aviation. The amount of buildup can be estimated based on past experiences as well as the number of hours flown.

Aerospace Orbit, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find or urgent aircraft components. Aerospace Orbit is a premier supplier of aircraft parts, NSN parts, electronic components, and heat exchangers, whether new or obsolete. Aerospace Orbit has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, 24/7x365. If you’re interested in a quote, email us at sales@aerospaceorbit.com or call us at +1-509-449-7700.


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plate fin, heat, exchanger, aircraft,cooling,duct

Heat exchangers are used to transfer heat from one source to another. Thermal energy is transferred from one source to another without water and gas coming into contact with each other. These heat exchangers are commonly used in a variety of aircraft components. In aviation, flat tube and plate-fin heat exchangers are the most commonly used in aviation. These components must be properly cleaned in order to function smoothly.

Because they will be used at high altitudes, temperature, air density, and pressure resistance all need to be taken into consideration. The fan used in the heat exchanger must also be carefully selected since more airflow is required to remove heat in higher altitudes where air density is much lower.

Liquid cooling tends to perform better than air cooling alone. Liquid cooling is also quieter and less vulnerable to the problems associated with high altitudes. It requires less power and weighs less because there is no need for a large fan or wide spacing.

Plate-fin heat exchangers use plates and finned chambers in order to transfer heat. They can be used for air-to-air, air-to-liquid, or liquid-to-liquid cooling. Considering their weight, this type of heat exchanger performs very well.

Flat tube heat exchangers consist of several flat tubes that are vacuum-brazed in between. These tend to be less expensive than plate-fin designs.

There are high standards when it comes to cleaning heat exchangers. This is due to all the strict and stringent safety requirements that govern aviation. The amount of buildup can be estimated based on past experiences as well as the number of hours flown.

Aerospace Orbit, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find or urgent aircraft components. Aerospace Orbit is a premier supplier of aircraft parts, NSN parts, electronic components, and heat exchangers, whether new or obsolete. Aerospace Orbit has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, 24/7x365. If you’re interested in a quote, email us at sales@aerospaceorbit.com or call us at +1-509-449-7700.



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actuator

One of the most important components to making flying safe is the actuator, a “mover” that uses a control signal and power source in order to move and control a mechanism or system. They play a vital role in flight and control, ensuring safety of the aircraft and passengers. In the case of aircraft actuators, they are used in landing gear, flaps— and, in the military, weapons systems.

Landing gear actuators are used to provide the retraction and extension motion for the landing gear located at the bottom of the fuselage. Originally, airplanes were fitted with hydraulic actuators, however, many companies are beginning to transition to electric actuators for better technology and more reliability. Because these actuators are located very close to the ground while the airplane is moving at high speeds, they have to be able to withstand high-pressure up to at least 5,000 psi and be built very strong to resist damage caused by debris kicked up by the wheels. But, because weight matters, landing gear actuators are usually made from lightweight materials.

Aircraft flap actuators, also known as “flap actuators”, are located on each wing and used to maintain efficient flight at low airspeeds. They’re mounted with a rotating screw that allows the flap to move up and down accordingly. On larger aircraft, there are retractable flap actuators placed on the outside edge of the wing in order to change the effective surface area of the airfoil and counteract the lack of lift generated at lower airspeeds.

Weapons systems also use linear actuators to ensure reliability. In combat, fighter jets need to be able to consistently open the bay doors to access the weapons. If the doors don’t open, or they jam, they could lose their lives. So, fighter jets use electric and hydraulic actuators equipped with sensors and stop modules to ensure reliability and safe use.

 At Aerospace Orbit, owned and operated by ASAP Semiconductor, we are a premier online distributor of aircraft and electronic parts and components. We carry everything from aircraft engines and fuselage components, to landing gear and actuators parts, new and obsolete. If you’re interested in a quote or more information about aircraft actuators, visit us at www.aerospaceorbit.com or call us at +1-509-119-7700.


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engine-overhaul

The most expensive and important part of an aircraft is easily the engine. Sometimes you don’t have any other option than to overhaul your current engine. It can be a frustrating process, but it gets easier when you know who to turn to and what needs to be done.

It’s important, for safety reasons, to regularly inspect and maintain your aircraft engine. Every 1,800 hours for a hot section inspection, and 3,600 for an overhaul. The hot section inspection is when all the hot section engine components are inspected to ensure that they can generate enough power to fly efficiently and safely. An overhaul is when the entire engine is disassembled, cleaned, inspected, reassembled, tested, and shipped back to the installation agency.

Overhauls are a thorough process. The engine’s four major sections, accessory gearbox, gas generator section, power section, and reduction gearbox, have to be disassembled and properly inspected. All the fuel control units, fuel pumps, nozzles, flow dividers, fuel oil heaters, speed governors, heated tubes, and ignition units need to be overhauled. Engine mounts are changed, and engine hoses are reviewed at this time. Mandatory and optional service bulletins are usually addressed at this time as well.

Because of how much more work an overhaul is, the price can be extremely high. Understanding your engine and what needs you have regarding your engine can help provide you with a better cost-benefit analysis. Sometimes it’s more cost-efficient to just upgrade than to overhaul. However, this also depends on who you’re working with. Are you comfortable with paying a bit more for an authorized and approved service center? Or are you okay with using a cheaper service center that your engine’s OEM does not support?

Choosing the right service center to oversee and do your overhaul is important. Experienced and reliable service centers will walk you through the entire process and help you weigh different costs and benefits, provide you with competitive quotes with options, be willing to answer all your questions, and be able to do any extra work you may need or want done. At Aerospace Orbit, owned and operated by ASAP Semiconductor, a premier supplier of NSNs and aviation parts, we want help alleviate the stress of your next overhaul or upgrade. So, we make sure that we stock and supply our customers with quality aviation parts at competitive prices. Check us out at www.aerospaceorbit.com to get started.


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evacuation-slide

Often now the aircraft safety videos are disregarded. This may be because aircrafts today have become so much safer than ever before and customers do not see the importance of them. The statistics of aircraft fatalities have decreased every year. As a matter of fact, the U.S. had zero aircraft fatalities in 2017. Since airline safety has become very stringent we may think less and less about what to do in case of an emergency some may believe the burden lies on the airline and not the customers. However, it is useful to know how the evacuation process works in the next time you are on your flight.

To start, it is good to know every commercial aircraft has an emergency evacuation slide now. Aircrafts have become much safer as they have become a very prominent mode of transportation as thousands of domestic and international flights, fly every single day. But it is good to know what happens in the case of an emergency.

First off, when the door is closing for take off the pilot speaks over the speaker to the cabin crew saying, “Doors to automatic and cross check”. This means to put the doors in automatic mode. Meaning when you are in an aircraft emergency, the evacuation slide will deploy automatically. Then the opposite is announced when landing “Doors to manual”. In the case of an emergency, slides will deploy automatically as the doors open, however if they are on the manual setting the slides will not deploy without further actions. The inflation process takes about 6 seconds. The goal is for all passengers must be able to leave the cabin in less than 90 seconds. Most slides can serve as a raft now except on certain aircrafts. The raft is very useful in the case that there is a emergency landing overseas.

Aerospace Orbit, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find or aircraft evacuation slides. Aerospace Orbit is your premier online distributor of aircraft parts, NSN parts, and Electronic component. Whether new, old or hard to find, they can help you locate it. Aerospace Orbit has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, at all hours of the day. If you’re interested in obtaining a quote, contact the sales department at www.aerospaceorbit.com or call +1-412-212-0606.



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boeing-max-737ng

Boeing recently passed their one-year anniversary of the 737 Max. Their anniversary has been supported by a large, in-service fleet that has satisfied the promises for improved fuel efficiency while also fighting problems normally faced with new aircrafts. The Boeing Company delivered one-hundred thirty aircrafts that represent two versions of the 737 Max in its first 12 months of delivery to Lion Air’s subsidiary that is based in Malaysia. It is speculated that delivery could have been higher, but CFM International, the engine supplier for the 737 Max fell a few weeks behind on a scheduled ramp-up of Leap-1B engine production.

The one-hundred thirty deliveries of the 737 Max within just one year is double the delivery of the A32neo family that Airbus Group delivered to customers over its first year of operation. Airbus also faced issues with supplier production shortfalls, which involved cabin interiors and backload for the Pratt and Whitney PW1100G engine. As of now, the twenty-eight Max operators have logged almost 120,00 hours on almost 42,000 flights. The operators carried 6.5 million passengers.

The 737 Max family faces a high expectation for reliability, as the experienced 737NG series operates with a 99.7% mission dispatch rate. Boeing vice-president Randy Tinseth notes however that minor issues are bound to be faced in the beginning. Boeing’s fleet now hold a 99.4% mission dispatch rate, which is projected to improve to 99.7% by the end of this year.

Aerospace Orbit, which is owned and operated by ASAP Semiconductor, is an easy to use platform to source national stock members from more than thirty federal codes, thirty million electronic parts, and seven million aviation assemblies. Listed as #16 on Orange County Business Journal’s list of fastest growing private companies within just 3 years of its founding, AFR Enterprises has risen to become a unique and complete procurement service for purchasing requirements. For customers sourcing for parts ranging from cabin interior parts to bearings, fasteners and more, ASAP Semiconductor is focused on providing excellent service to all customers.


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law-changes-new-fan-blades

After the recent disaster that happened on Southwest Airlines Boeing 737, where an engine disintegrated mid-flight causing shrapnel to break a window and have a woman almost be sucked out of the plane, more pressure is being placed on companies to check individual fan blades more frequently.

The FAA has decided that fan blades need to be monitored more. This means that blades must now be checked before 20,000 miles and after 20,000 miles the blades will be re-checked every 3,000 rotations. Fan blades, CFM56-7B should also be checked as soon as possible, even if they had been checked just before the new motion was put in order. This is even more important if the fan blades have completed 30,000 rotations. Company’s and MRO’s should expect to get their blades checked every two years or so. Two years is about the equivalent of 3,000 blade rotations.

These new rules should impact over 3,000 different engines across the world and if set in place before could have saved lives. Southwest Airlines plane that was involved in the tragedy was found to have hair pin fractures across its fan blades in the left engine. These miniature cracks are likely the cause of the engine tearing apart mid-flight and causing one fatality.

This kind of incident is something that can be avoided with proper attention and active care of planes and their engine blades. It’s horrible that it caused the death of a passenger for this order to be put in place. Maybe now, things like this will be taken more seriously.

Aerospace Orbit

Aerospace Orbit, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find and urgent aircraft needs. Aerospace Orbit is the premier supplier of aircraft parts, whether new, old or hard to find, they can help you locate it. Aerospace Orbit has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, at all hours of the day. If you’re interested in obtaining a quote, contact the sales department at sales@aerospaceorbit.com or call +1-509-449-7700


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