|Nov 15, 2012, 12:24 PM|
Anyway thanks for all the advice and info, hope this can also help someone else with a similar issue.
|Nov 16, 2012, 12:12 PM|
Blacksburg, VA 24060 USA
Joined Feb 2000
"Thrust issues are easy to confuse with pitch trim and stability. The pattern guys have systematic trimming routines in a particular order to sort out which is which."
So what do you work on first? Pitch first, then thrust?
|Nov 17, 2012, 08:13 AM|
Just use the logical approach
once you get it in the air , trim the flying surfaces for an easy to fly trim.
the speed for this stage of trim should be a nice easy to fly cruise speed .
Once you get this sorted out - try lower power and higher power
If you see big differences in climb or dive as power changes- - First see if cg is reasonably close to correct - make gradual cg changes - finally- play with the thrust setups .
The old pattern trim charts are a decent starting point but getting sensitivity .
Here is the good part - with more experience in trimming -it all gets easier -
If you just chase the plane around - -it never gets easier
It is a learning curve - I have taken "trimmed" models which are difficult to land,etc., and by going thru the very basics, retrimmed the model for good manners.
You can't do the trimming on paper - you have to fly it to do it.
beleive it or not - once you "get it", you will find you can figure out the trim of someone elses model - by just watching them fly it.
|Category||Thread||Thread Starter||Forum||Replies||Last Post|
|Build Log||yet another scratchbuilt twin boom pusher||xatled99||FPV Talk||54||Aug 18, 2012 12:41 PM|
|Discussion||Inv V-tail Twin Boom Pusher Ė Yet another one||wingnutt||FPV Talk||6||Apr 28, 2012 06:40 PM|
|Discussion||100" Pusher Glider with Twin Booms A-tail||rclab1||The Builders Workshop||4||Mar 06, 2012 06:43 PM|
|Discussion||Looking for pusher prop planes. Preferably twin boom tail.||SFGuy||Electric Plane Talk||8||Oct 31, 2009 07:06 AM|
|Discussion||Another Twin Boom pusher AP plane||Bob Chiang||Aerial Photography||5||Nov 02, 2008 01:46 AM|