A week or so ago two of you were kind enough to guide me re: set up on my 32” Sbach…
Originally Posted by ccpdx
I think you want to do most of your tweaking with CG and not with thrust angles. I'd move your CG back to the point where it flies the same upside down as it does right side up - without diving or ballooning. Also don't use any elevator trim which isn't needed in the same amount and in the same direction for both upside down and right side up. Hopefully you'll have no trim at all set up. Just my opinions.
Originally Posted by Stark
In my experience this mean that your CG is to far forward. You can confirm that by flying inverted. If it dives when upside down the CG needs to be moved back.
Another thing that is important on this small planes is lateral balance. If the plane roll out of a fairly tight outside loop, one wing is heavier than the other. Try to balance with the battery and if it is not sufficent, use a small screw as a weight in the lighter wingtip.
With good lateral balance will it fly very precise through all manoeuvres.
I’m happy to report that (after a miserable
period of weather here in the UK) I finally managed to get out and setup the plane properly, and your advice was bang on! I suspect the CG is not quite at it’s final position (I need more practise at hovering and further experimentation with the rate and expo settings to fully harmonize the controls), but it’s now pretty much hands off inverted. It also exhibits none of the “climb under throttle, nosedive when shut” characteristics of before. Frankly it’s brilliant (but you guys all know that already)!
As a dyed in the wool glider guider I’ll happily admit I’d dismissed profile foamies til now; how wrong I was
. In calm conditions this is the most finely controllable form of flying I’ve ever done – I’m guessing that once you’re good enough flying one of these things through a 3D routine is similar to the feeling cats have when they’re playing with a mouse! Just goes to show you should always experiment in with different forms of the hobby, otherwise you might never know what you’re missing…