By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

e-gangster CoG issue

All Topics | Latest Posts

Search for:  in Thread Title in  
rcaddict06/12/2018 13:07:12
499 forum posts
14 photos

just had a prang with an old gangster 52 that i converted, i suspect the the Cog was too far forward as when i throttled back to land it kind of dived into the ground (all repaired now) also elevator was sluggish requiring a lot of input - does this sound like Cog issue to you guys?

Engine Doctor06/12/2018 14:14:34
2142 forum posts
20 photos

It could be COG or it could be thrust line issues . Was motor shaft set at the same angle as the I/C engine shaft ?

rcaddict06/12/2018 14:20:58
499 forum posts
14 photos

yes thrust line was the same - or not far off

Bob Cotsford06/12/2018 17:58:08
7683 forum posts
427 photos

In my opinion it sounds to be nose heavy, the sluggish elevator response is the giveaway.  Try the 45 degree inverted climb test or the power off vertical dive, either should show a big deviation from a straight line if it is that nose heavy.

Edited By Bob Cotsford on 06/12/2018 17:59:44

Peter Jenkins06/12/2018 23:31:52
1153 forum posts
127 photos

OG, you might find following this trim process helpful. Your description of your aircraft's behaviour points towards a CG that is too far forward but as already mentioned it could also be the thrustline is out. The process I've linked you to deals with how to sort out the thrustline both for pitching and yawing issues. Be interested to hear how you get on.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Latest Forum Posts
Support Our Partners
Wings & Wheels 2018
Airtek Hobbies
Motion RC
electricwingman 2017
Gliders Distribution
Advertise With Us
Latest "For Sale" Ads
Which part of building a new traditional balsa aeroplane do you enjoy the most?
Q: Which part of building a new traditional balsa aeroplane do you enjoy the most?

 Research & choosing the model
 Building the fuselage
 Installing the engine and radio systems
 Building the flying surfaces
 All of it!
 None of it. I'd rather someone else did it!

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us