rvmach50

Thanks to all that have helped so far!!!!!


I have a problem with my os37 in my hawk pro . I set the needles to were the manufacture said and I have good topend but it stumbles at the start. It idles good but if I give it throttle almost to half stick it starts to bog down . I'm not shure if it is my throttle curve or a carb setting.
When I first setup my heli a guy that said he was a pilot for years helped me . but I couldn't get a stable hover, so I read and read and saw that my pitch was to high for the head speeds at hover now I have a good 1600 to1700 rpm at hover . it hovers great at just above half about 5.5 pitch. I know this is hard to fix over a computer but so far most all help has put in the right derection.


set throttle at 15 35 55 75 100
pitch at -1 3 5.5 7.5

thank Jerry

sceadu37

sometimes, the factory settings will be too rich to do squat...

if its was bogging i would lean it off a bit and see

BarracudaHockey

My Feedback: (11)

Try leaning your low speed needle just a hair at a time. The book settings are just starting points.

http://www.raptortechnique.com has a great section on beginner and advanced engine tuning that applies to most models.

tanasit

One more thing to check, remove the air filter and see when the throttle stick is at mid point or around 50% setting, does the carb open about half way too. And at full open stick, you should see a full round open without the linkage bend. Without this inspection, you throttle setting at 15 35 55 75 100 may not mean much.

leaning your low speed needle just a hair at a time is the best advice.