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Letters

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...the Skybolt. He went with a Pitts-style cabane assembly, which is easier to build. He also did away with the elliptical planform and lost a few square feet. Finally, he...

Alternative Energies

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...battery assembly fits neatly right behind the pilot. Booker’s Red Tail Hawk has wings based on Monnett Moni spars and a planform with a long, rectangular center section and tapered...

Alternative Energies

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...craft easily managed by the average pilot. The planform for the Alternair Amp. Power Supply Surprisingly, the aircraft will achieve this LSA performance with a mere 20-pound, 30 kW (40.2...

Wind Tunnel

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...wingspan. An elliptically loaded wing therefore has a span efficiency of 1.0. A wing with a non-elliptical planform such as a constant-chord or straight-tapered wing can have a span efficiency...

Tail Surfaces and Aerodynamic Effects

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...arm. Tail Design Considerations The airplane designer must choose the right combination of tail arm, tail area and tail planform to provide the desired characteristics. The most fundamental trade-off is...

Letters

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...force due to a small difference of the blades in pitch, planform or both. If a two-blade propeller is mounted to a 6-inch flange with as little as 0.01-inch (ten-thousandths...

Remember When: The BD-5 Micro

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...same tight radius, watching his tiny gray planform growing rapidly in my sights. We executed a classic scissors and yo-yo, and then circled once before I latched on to his...

Wind Tunnel

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...to increase the amount of opposing hinge moment caused by elevator deflection. There are several ways to do this.Elevator Planform and Tail Aspect Ratio The hinge moment generated by a...

Wind Tunnel

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...while the governor can change the pitch of the blades, it cant adjust the blade twist or planform.Why Constant Speed?See Figure 1 to appreciate the primary reason to choose a...

Sensenich Goes Composite, Introduces New Ground-Adjustable Prop

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...internal-pressure-molded system. According to the company, this production process yields a durable, low-inertia propeller. The propeller is designed with a swept-blade planform for maximum efficiency. The EZ-pitch hub features a...

In Case You Missed It

Quickbuild: Behind the Scenes

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A visit to the Bearhawk factory in Mexico.
Dave Martin

Dave Martin 1938–2021

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What we are today was set in motion by Dave more than three decades ago.

Home Shop Machinist

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Gnarly good knurls.

Building a Tunable Carbon Fiber Induction Plenum

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There’s always more to learn when increasing your engine’s horsepower output and optimizing volumetric efficiency.