ea81 thrust test

[ben]

hello,
you guy that run ea81s with a redrive. got some questions for ya

1 what size and kind of prop do ya'll swing?
2 what is your all up weight??
3 what are your rpms in cruse?
4 what are you rpms max limit?
5 do ya know how much thrust your machine puts out and at what pitch

thanks for taking the time, BEN

[mceagle]

Taking a rough average from many machines that I am familar with.

1 Three blade Warp Drive - 76"
2 650 lbs
3 4200 econ cruise, 4800 fast cruise
4 5200
5 greater than 440 lbs (scale limit)

(6) drive ratio 2.62 : 1

[ben]

TIM
thanks, i'm glad you took the time to answer. i was speaking to some people about the size props ya'll run on an ea81 they had a hard time believing that you guys turn 72 to 76" props at 13 degs and 14degs at 5000 to 5200 . thats what i plan on doing but the biggest i can go right now will be 72", i'm hoping to throw 500 lbs of thrust.

[mceagle]

500 lbs should be no problem. Simply going from 72" to 76" is worth 30 lbs of thrust.

[ben]

tim
i'll be going from a 62 " to a 72"

[ben]

gents

i've have seen 2 ea81 with what looks like 4 coils (one for each plug) and no distributor is this what they call wasted spark ?? run of a crank sencer?? and is it a good thing for a gyro?