Trimming a new stunt ship

Stuka Stunt Main Forum · 6 of 6 known posts recovered

Jimm · Mar 13, 2001 03:51 PM

I have read various articles,on trimming stunt ships in Stunt news and this forum over the past year. They each cover an aspect of trimming stunt ships. I am looking for guidance on the basic steps to follow when I get my new Sig Chipmunk in the air.

Does anyone have a checklist they use when they begin trimming a new medel? There must be a systemic method, or sequence, that people use.

Thank you,

jimm

The Kiwi · Mar 13, 2001 04:04 PM

RE: Trimming a new stunt ship, per Walker #1 source

Paul Walker made a chart of the steps and his sequence works. It has been published several places, and probably is among the goodies on some web site or another. PAMPA's site is a good place to start looking, but I can't recall where I saw it last & my scanner doesn't work with this newer PC I have, so I can't put in an email attachment (even if I was sure I could put my hands on a hard-copy on my end).

Kiwi

._.

Jim T. · Mar 13, 2001 08:00 PM

#2 source

Paul Walker's flow chart is very good and much better than what I'm going to tell you, but maybe this will help. Trimmming involves both airplane and fuel system. For the first flight, set your engine like you think it should be, put excess weight in the weight box and move the leadouts far enough back that when you hang the airplane by the leadouts, it hangs out a bit.

Take off and fly level. Look for two things. Does the airplane fly level or does the outside wing hang down or up? Are you looking right down the wing or is the airplane cocked out. If all is going well enough that you don't think you will immediately crash, take the airplane up to about 45 degrees and fly a couple of laps. If the engine dosn't sag, bring it down and try a fairly large loop. If that goes well, fly a couple of inverted laps and listen to the engine. Also look to see if the outside wing is up or down, or level. If all is well, you are ready for the Walker treatment.

If at anytime you lose confidence in the airplane, fly it level until you run out of fuel, then fix whatever is wrong and start over. Patience and being anal will save you a lot of repair time.

Jim

FKrueger · Mar 14, 2001 10:11 AM

#3 source

Jim,

I scanned the Mar/Apr '97 PAMPA trimming article into a PDF file. This is a reprint of Paul Walker's May 1991 article "IMPACT" from 'Flying Models'. It includes the trimming flow chart.

Email me at either [email protected] or [email protected] and I will email the PDF file to you.

Fred

Bob Reeves · Mar 14, 2001 02:55 PM

#4 source

LAST EDITED ON Mar-14-01 AT 02:57 PM (EST)

I asked Fred to email me the PDF file so I could throw it up on the web.. here is da link

www.eaglextra.com/images/FlightTrim.pdf

If the copyright police get us I will have to remove it but we will see.. Also hope posting this url doesn't force everyone that views this message to download the PDF file.. I still haven't figured out how to post a link to an image without it showing up in the message...

Enjoy..

Bob

Well that didn't work even as a link.. Just copy and paste into your browser and you should be there...

jimm · Mar 14, 2001 03:35 PM

#5 source

Thanks, everyone, so much for the help. I have downloaded and saved the pdf file for future reference. I have also printed out all the responses for my notebook.

jimm