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-   -   A Roo question (https://www.rcuniverse.com/forum/rc-jets-120/144762-roo-question.html)

jetspud 05-27-2002 12:48 AM

A Roo question
 
I have asked before but I dont think I got the right answer. How high is the back of the turbine mount supose to be raised. Inches centimeter, ect ect.. The book says four 5.3x10 which is 21.5 mm high Is that right.. It seems kind of alot...

Thanks :o

David Elizondo

bradders 05-27-2002 04:28 AM

Roo Q"s
 
the motor is propped up approx. 1/16to1/8 of an inch you dont have to use washers a suitable piece of ply or something willdo the job. dont forget to use slightly longer screws to compensate
cheers
bradders

Bill_Jehle 05-27-2002 09:28 AM

Roo mount
 
David,

A good starting place is to raise the back of the mount 1/16". Those dimensions are the ID and OD of the washer and do not relate to how thick they are.

Jetjock51 05-27-2002 04:02 PM

Engine Shim
 
Almost three years ago at Superman, Andreas told me to put a 2MM shim under the back of the motor to eliminate the pitch down at rapid throttle up from slow flight, such as in a go around. I had a piece of aluminum which appeared to be about 1/16th inch thick, which I cut 1/2 in. wide and long enough to go across the width of the engine mount pylon. I drilled the appropriate hole for the rear mounting screw, and flew both my Kangaroos like that. It eliminated almost all the nose down pitching associated with throttle up.

Dennis Lott


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