f3a trimming sequence by P GoldSmith

Started by shadman_alam, March 07, 2012, 06:17:40 PM

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shadman_alam

this is a f3a trimming squence for perfectly trimming the model in all orientations...

flying doc

Great document. Not only for F3A but for all kinds of set up. thanks man.

Doc
Tiger Sports 40, SPA3D, SPAD Extra all with ASP 52 engines.
SPAD Debonair with OS 46
Turbo Raven 60 with an ASP 91
Next build - Accipiter 91 with DLE 20
Futaba 6EXAP, Futaba 10 CAP

shadman_alam

For serious precision flying... this is  how a plane needs to be trimmed... After reading this,i think i will re configure all my planes... 

shadman_alam

#3
no wonder my knife edges tucked belly in

shadman_alam


AshwinM


rcpilotacro

alam
Read the document, i dont agree with some of his issues, reasons
(a) Issue on control throw and Expo, in real aeroplane we have something called a non-linear mechanism, it is designed for a approx 65% expo, it all depends on the CG margin (See my aerodynamics thread) and moment arm. eventaullly it should behave linearly not throw linearly

(b) at high speed i will want vey flat centre for the simple reason it shoudnt over react to my control input (in real aeroplane we manage this with a mechnism called 'Q' feel)

(c) Obviously smith is not real life aerobatic pilot probably, with 1000s of hrs of aeros he woud know what he is talking,

bottom line, whatever you fly it should feel good, (1) Cross coupling should be removed (Mix spoiler as much as to nullify this) (2) it should feel right when you fly

Going by some book written by somebody based on his own experience is only applicable for him/her, your style of flying could be different,

fly the way it feels right to you listen carefully, aeroplane talks to you in every manoevure, set p-mixes accordingly, wrong p-mix can crash your model

That will be my advice, of course this book can be a starting point
Gusty's Hangar and Introduction.

A Good pilot will practice until he gets it right,
A Great pilot will practice until he can't get it wrong.