VTOC_GUY:
Originally posted by vtol_guy Hi,
...twin engined VTOL thing...
My pessimism has changed you from "Vertical Take-Off/Landing" to "Vertical Take-Off/Crash." Sorry. But I see many problems.
For take-off and landing I would strongly suggest you go to the helicopter area and search for entries about the twin rotor Hirobo.
I think I've seen several different twin rotor coaxial helicopters, but the only twin rotor NOT coaxial, which your VTOL, I assume is, is kitted by Hirobo. And due to the cost and complexity they haven't sold a lot.
I see two immediate problems, the first easy to fix, the second not so easy.
If the engines have the same rotation the plane will pinwheel the minute it comes off, easily fixed by going to counter rotating engines.
The harder problem to solve will be matching thrust, I just don't think you will be able to regulate the engines quickly enough to be stable in the vertical mode. Not just your reaction time, but also the engines wont respond fast enough. In normal flight this problem will go away.
And finally, for now at least, if you dont have enough wing to fly normally the loss of an engine guarantees a crash. Unless you have a cross drive system. And if you do, just use a single engine to drive both rotors. There! I knew we could solve your problems! Haw.
Now that all that's out of the way, let me say I'm awed by your project, and interested in how you do with it. Please keep us informed, and while you're "Sailing off the edge of the explored world," I'm sure that if anyone on RCU can help you, that help will be freely offered.
Lose power to one rotor...
. "MA! I want my motorrrrrrr!!!!!!
Bill.