Human-Powered Aircraft Propeller Testing - Propeller in wind tunnel for performance testing.]]> image-id:83 Propeller Testing - Propeller in wind tunnel for performance testing.]]> Chain Twist - 90 degree twist in chain with tensioner.]]> image-id:82 Chain Twist - 90 degree twist in chain with tensioner.]]> Carbon Fiber Frame - Aligning carbon fiber tubes to create lightweight frame.]]> image-id:81 Carbon Fiber Frame - Aligning carbon fiber tubes to create lightweight frame.]]> Chipped Tip - Propeller tip damage sustained during testing.]]> image-id:80 Chipped Tip - Propeller tip damage sustained during testing.]]> Custom Wheel - Cutting out custom wheel step-by-step.]]> image-id:79 Custom Wheel - Cutting out custom wheel step-by-step.]]> Propeller Thrust Sensor - Pressure gauge set up to measure torque applied by the propeller.]]> image-id:78 Propeller Thrust Sensor - Pressure gauge set up to measure torque applied by the propeller.]]> Skin Sample - Small test layup of aircraft skin.]]> image-id:77 Skin Sample - Small test layup of aircraft skin.]]> Skin Sample - Small test layup of aircraft skin.]]> image-id:76 Skin Sample - Small test layup of aircraft skin.]]> Propeller Torque Sensor - Pressure gauge set up to measure torque applied by the propeller.]]> image-id:75 Propeller Torque Sensor - Pressure gauge set up to measure torque applied by the propeller.]]> Rear Suspension - Shock and swingarms for rear wheels.]]> image-id:74 Rear Suspension - Shock and swingarms for rear wheels.]]> Trike with Propeller - Testing the drivetrain on aluminum frame.]]> image-id:73 Trike with Propeller - Testing the drivetrain on aluminum frame.]]> Propeller Balancing - Adding weight to account for blade imbalance.]]> image-id:72 Propeller Balancing - Adding weight to account for blade imbalance.]]> Custom Oven - Oven testing for curing carbon fiber epoxy.]]> image-id:71 Custom Oven - Oven testing for curing carbon fiber epoxy.]]> Building a Joint - Applying epoxy by hand.]]> image-id:70 Building a Joint - Applying epoxy by hand.]]> Front Suspension - Front wheel shock and swingarm to provide some durability on rough landings.]]> image-id:69 Front Suspension - Front wheel shock and swingarm to provide some durability on rough landings.]]> Bottom Bracket Shell - Aligning and installing a carbon fiber bottom bracket shell.]]> image-id:68 Bottom Bracket Shell - Aligning and installing a carbon fiber bottom bracket shell.]]> Alignment Jig - Aligning rear suspension pieces.]]> image-id:67 Alignment Jig - Aligning rear suspension pieces.]]> Airfoil Verification - Checking the propeller airfoil for correctness.]]> image-id:66 Airfoil Verification - Checking the propeller airfoil for correctness.]]> CoCreate - The aircraft rendered in CoCreate Modeling. Black is carbon and gold is Kevlar.]]> image-id:65 CoCreate - The aircraft rendered in CoCreate Modeling. Black is carbon and gold is Kevlar.]]> Aerolite Pedals - 118 gram Aerolite pedals including cleats and screws. Pedals and screws are titanium.]]> image-id:64 Aerolite Pedals - 118 gram Aerolite pedals including cleats and screws. Pedals and screws are titanium.]]> Aerodynamics - Aerodynamic analysis of the aircraft shows induced drag (yellow) and profile drag (purple). Analysis done in XFLR5.]]> image-id:63 Aerodynamics - Aerodynamic analysis of the aircraft shows induced drag (yellow) and profile drag (purple). Analysis done in XFLR5.]]> Fuselage Trike - The landing gear, drivetrain, propeller in aluminum for testing. The aircraft minus wings, tail, and shell.]]> image-id:62 Fuselage Trike - The landing gear, drivetrain, propeller in aluminum for testing. The aircraft minus wings, tail, and shell.]]> Shoes - Lightweight Custom D2 Superfly Shoes]]> image-id:60 Shoes - Lightweight Custom D2 Superfly Shoes]]> Wheel Testing - The wheel was tested on a bicycle to make sure it hadn't lost too much strength after it had been drilled out.]]> image-id:59 Wheel Testing - The wheel was tested on a bicycle to make sure it hadn't lost too much strength after it had been drilled out.]]> Carbon Wheels - Custom made Carbon Fiber 20" wheels. Total weight with hub is less than one pound.]]> image-id:58 Carbon Wheels - Custom made Carbon Fiber 20" wheels. Total weight with hub is less than one pound.]]> Motor with Load Cells - The motor for propeller testing is attached to load cells to measure torque and thrust. These sensors will help determine the efficiency of the propeller.]]> image-id:57 Motor with Load Cells - The motor for propeller testing is attached to load cells to measure torque and thrust. These sensors will help determine the efficiency of the propeller.]]> Propeller on Tripod - The propeller rests atop a tripod where it will be during propeller wind-tunnel testing.]]> image-id:56 Propeller on Tripod - The propeller rests atop a tripod where it will be during propeller wind-tunnel testing.]]> Propeller on Tripod - The propeller rests atop a tripod where it will be during propeller wind-tunnel testing.]]> image-id:55 Propeller on Tripod - The propeller rests atop a tripod where it will be during propeller wind-tunnel testing.]]> Propeller Templates - The finished propeller templates. They matched the blade shape very well.]]> image-id:54 Propeller Templates - The finished propeller templates. They matched the blade shape very well.]]> Machining Templates - Propeller airfoil templates being machined to verify the propeller shape.]]> image-id:53 Machining Templates - Propeller airfoil templates being machined to verify the propeller shape.]]> MDF Propeller Profile - The MDF propeller blade moved slightly during machining. The airfoil shape was distorted.]]> image-id:52 MDF Propeller Profile - The MDF propeller blade moved slightly during machining. The airfoil shape was distorted.]]> MDF Propeller - The finished MDF propeller blade looks fine from this angle.]]> image-id:51 MDF Propeller - The finished MDF propeller blade looks fine from this angle.]]> MDF Propeller Machining - The MDF propeller blade being machined to shape. Each blade is one meter long.]]> image-id:50 MDF Propeller Machining - The MDF propeller blade being machined to shape. Each blade is one meter long.]]> Wooden Propeller Machining - A small carbon fiber spar was laminated with the plywood to increase the blade stiffness.]]> image-id:49 Wooden Propeller Machining - A small carbon fiber spar was laminated with the plywood to increase the blade stiffness.]]> Wooden Propeller Machining - A new blade being shaped out of laminated wood. If the propeller is successful, it will be remade out of carbon fiber.]]> image-id:48 Wooden Propeller Machining - A new blade being shaped out of laminated wood. If the propeller is successful, it will be remade out of carbon fiber.]]> Wooden Propeller - The almost complete wooden propeller. The blade tip is finished by hand.]]> image-id:47 Wooden Propeller - The almost complete wooden propeller. The blade tip is finished by hand.]]> Twisted Chain - The chain drivetrain is tested for it's ability to twist. The chain is titanium and does not need to be oiled because of its ceramic coating.]]> image-id:31 Twisted Chain - The chain drivetrain is tested for it's ability to twist. The chain is titanium and does not need to be oiled because of its ceramic coating.]]> Rotor Cranks - You can see that the near crank is already 15 degrees into the down stroke when the far crank has reached it's lowest position. Cranks spin clockwise.]]> image-id:30 Rotor Cranks - You can see that the near crank is already 15 degrees into the down stroke when the far crank has reached it's lowest position. Cranks spin clockwise.]]> Rotor Cranks - You can see that the far crank is already 15 degrees into the down stroke when the near crank has reached it's lowest position. Cranks spin clockwise.]]> image-id:29 Rotor Cranks - You can see that the far crank is already 15 degrees into the down stroke when the near crank has reached it's lowest position. Cranks spin clockwise.]]> Recumbent - Neal's homebuilt recumbent. It will be used with the CompuTrainer to test pilot positions. The rear wheel will be placed on a jack to make height adjustments.]]> image-id:28 Recumbent - Neal's homebuilt recumbent. It will be used with the CompuTrainer to test pilot positions. The rear wheel will be placed on a jack to make height adjustments.]]> CompuTrainer - Bicycle on the stationary resistance-motor trainer. Records wattage, heart rate, RPM, etc. Workouts are programmed in through the laptop.]]> image-id:27 CompuTrainer - Bicycle on the stationary resistance-motor trainer. Records wattage, heart rate, RPM, etc. Workouts are programmed in through the laptop.]]>