Doug C
Senior Heliman
Location: Northern CA
My Posts This: Topic Forum | USUL,
the output of the Turbine is not physically connected to the input of the second stage, so you could connect directly to the 2nd stage output,
However, US AMA Turbine rules state that is a no-no (I have no idea what the BMFA folks have to say about that), AND by not using the clutch the blades will start to spin the second the turbine spools up, at least with the clutch nothing happens until there is enough gas passing to overcome the blades inertia.
I would also consider it a bad idea to not use a clutch as you are going to have some thermal issues to deal with if to prevent the 2nd stage from rotating at idle.
Given the Wren 54 w/ 2nd stage is designed to use the Predator airframe with the supplied clutch why not build as designed
Doug C |
