Thanks. I'm planning to use belts instead of gears. The test data on coaxial propellers was good information. I appreciate your time.First, do some reading, e.g., http://hdl.handle.net/2060/19940005945 and
For the lightly-loaded props used on homebuilts, the aerodynamic advantages are likely illusory and the mechanical complications excessive.
-multi V-belt gear is a good dampfer...Thanks. I'm planning to use belts instead of gears. The test data on coaxial propellers was good information. I appreciate your time.
-great problem=battery weight and costs...Has anyone actually flown a series electric HBA?
Careful Henrik, I used the same link and believe it clinched my crackpot award just a little tighter. I agree with you that there is a very possible link to energy used and energy recovered that can apply to air travel, it involves timing of Nano or Micro-seconds of energy generated and reused.
=not CONTER, not ROTATING,
but OSCILLATING,very effective !
IFF to made proper size to air flying ???
=moore simple (for my homemade english ...)?I used the same link and believe it clinched my crackpot award just a little tighter
Hooking the two engines to a single (prototype, experimental) transmission seems like a step backward if we are carrying 2 engines because we can safely fly on one, and we'd like to be able to do that. Why deliberately create a single point of failure? This is the biggest issue . And, unless the props have controllable pitch, a single remaining engine won't be able to develop best thrust when driving 2 props that have a pitch optimized for twice the HP input. Also, if two engines are in one engine bay/nacelle, what do we need to do if we see smoke, fire there? Shut down fuel to both engines.If you're driving coaxial propellers with separate engines, making a center-line thrust twin, the mechanical complication may be worth it. Of course, to make the two systems independent, the engines will need to be as isolated as possible, with independent ignition, induction, exhaust, and cooling systems, and fuel systems that can be isolated.
Thanks. So, their two-engine coaxial drive met some of their requirements (cancellation of torque reaction, etc), but was abandoned because:
=yes,it is !two engines and propellers was not the sum, but only about. 70% of the expected