v22chap
Veteran
Location: Howe, Indiana
My Posts This: Topic Forum | speedvision
I picked my GMP up on ebay for 100.00
But you don't have to get a GMP ,,as it is the same geometry as any of the modern day FB's - about 31 mm off center of the hub for the blade grips and centered on the main shaft .
And century ,vario and heliartist have been making flybarless no gyro heads for many yrs now .... just no one with a big name was paid to take up the ball and run with it until a few companies brought out FB gyro units.
Steve
These are the early original blade grips (attested to by Michael Gorham at IRCHA this yr ) ... later they did use thier own design of blade grip ...but it was still cast alum a bit longer and heavier by a little .
I also didn't say I was running my GMP head at 2500 ,, I said that blade technology now allows us to run FB heads around that rpm .
My FB GMP is run at 1650 and ya ,,one day it may disintegrate but it has served well for the last 1.5 yrs
And MrMel
I didn't any where in my post allude to the fact that it would replace gyro's for hard core 3-D guys and I did say it was a bit harder type head to fly in FF than the flybar or gyro assisted one .... but for us sport type flying guys ,,,, why spend the extra big bunch of money for something you don't really use ?????
And as far as the article on FB .. Like my Dad always said .."that paper lies still and ANYONE can print ANYTHING on it that they want ,,, don't believe it is gospel until you have tried it yourself ."
You will never know how well it works ,,, just reading articles about how it won't work and debating the facts ... you will need to not spend 500.00 and go out and try it .
This type of discussion and dare in the vintage section here on RR was what got me to try it as I was arguing that it could NOT fly worth a darn with another old timer there,,, as I do own a couple SK's for my rex 600 and 450 scale heads  .
So I bought the GMP FB and tried it out to prove him wrong .... guess what I was the one proved wrong
Stupineer ... I believe that it would work for sport type flying on your 90 ,,but I have not flown anything that big on gyro less FB ...
put a sort of training stick on across the back skids ,.be carful and go for it .You will probably find it great as long as you are not wanting to do hard 3-D .
Larry C ----------Bergen R/C helicopters |
