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Offline RickP  
#1 Posted : Monday, July 2, 2018 1:15:10 PM(UTC)
RickP

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Hello All,
I mean my airplane flies well, but I know it can be taken to the next level trim wise. I have a good list of rules of thumb but I am looking for a well published reference on how to trim out my airplane. Is anyone willing to share what they have, point me in the right direction so I can buy a copy for myself?
Much Thanks in advance.
RickP
Offline Dangerous Dan  
#2 Posted : Monday, July 2, 2018 1:39:56 PM(UTC)
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Originally Posted by: RickP Go to Quoted Post
Hello All,
I mean my airplane flies well, but I know it can be taken to the next level trim wise. I have a good list of rules of thumb but I am looking for a well published reference on how to trim out my airplane. Is anyone willing to share what they have, point me in the right direction so I can buy a copy for myself?
Much Thanks in advance.
RickP

Message me your email and I’ll send you peter goldsmiths trim article
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Offline Kevin  
#3 Posted : Monday, July 2, 2018 2:22:42 PM(UTC)
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Here you go!

PGoldsmithTrimming.pdf (57kb) downloaded 23 time(s).
Trim Chart.pdf (344kb) downloaded 23 time(s).
Offline Allen Delger  
#4 Posted : Wednesday, November 28, 2018 11:07:37 PM(UTC)
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RickP, I have been looking at the same thing. Along with the Peter Goldsmith information, here is another interesting approach. I thought it would be interesting to check the incidence angles, and see how the plane is built. However, I don't think I would try to mess with it on an ARF, as it would be difficult. Its also harder to check these angles on bigger planes, I think most of what they deal with are pattern planes. Maybe some of the builders on here have some tricks for checking, and changing incidence on big planes.

I don't know much about any of it, so can't really comment on the relative worth of the approach. They are selling a trim guide for $30, and I haven't decided to get it or not, maybe if someone on here has, they can comment on its value. I know I have ended up making a lot of flights trying to figure this out, and have got a lot of appreciated help from Dangerous Dan along the way. That's what this is all about right?

http://www.ckaero.net/bl...riangulation-trimming-2/
Offline Ron Graham  
#5 Posted : Saturday, December 1, 2018 12:21:32 AM(UTC)
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I've also seen an app out there being used. I've had little experience with it but I've heard good things. I'm sure someone knows the name of it.

I don't think you can go wrong spending a few extra $ on quality tools for measuring incidence and throw. I've helped a number of pilots set up arf's and my experience has been that the incidence is usually pretty good. It's the twist or warping that occurs in the flight surfaces you have to watch - especially if the weather is hot and you have open structure. Also- make sure both elevator halves are in sync throughout their throw.
Offline gobigdave  
#6 Posted : Saturday, December 1, 2018 12:53:53 PM(UTC)
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On iOS, the app is called "Trim App". I have it, and it works pretty well. Mostly, it walks you through the Goldsmith steps, and then it produces a report at the end. It helps to run through it with a friend while you fly.
thanks 1 user thanked gobigdave for this useful post.
Doug Pilcher on 12/2/2018(UTC)
Offline Adi Kochav  
#7 Posted : Sunday, December 2, 2018 12:43:08 AM(UTC)
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Looked for it but i cant find it on Apple store.
How it called on Google store ?
Offline Doug Pilcher  
#8 Posted : Sunday, December 2, 2018 7:15:53 AM(UTC)
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Originally Posted by: gobigdave Go to Quoted Post
On iOS, the app is called "Trim App". I have it, and it works pretty well. Mostly, it walks you through the Goldsmith steps, and then it produces a report at the end. It helps to run through it with a friend while you fly.


I downloaded this App from "App Store" on my iPhone and does seem like it is pretty straight forward. Noticed they seem to be working on a pay version maybe going forward.

Adi, do you have an iPhone or a droid? If iPhone, it is found thru the "App Store" on the iPhone itself and is free in it's current version. If you have a droid, maybe some droid users could help you with the "app" on Droids to access and download. I am not familiar with Droids and how they distribute their apps but I know it is similar in nature as it is done direct from phone.
Doug Pilcher
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Offline Adi Kochav  
#9 Posted : Sunday, December 2, 2018 3:38:16 PM(UTC)
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I have an iPhone and it’s not on the Apple store.
Can’t find it for some reason.
Odd.
Offline gobigdave  
#10 Posted : Monday, December 3, 2018 2:00:08 PM(UTC)
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Adi, where are you? In the US App Store, it shows up when you search for "trim app".

Dave
Offline Adi Kochav  
#11 Posted : Monday, December 3, 2018 2:34:41 PM(UTC)
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Not in the US Im in Israel so i couldn't see it but Doug sent me a link and I've downloaded it.
Thank you guys.
So, my plan is to make something like this one only that it will be more sophisticated with more features and upgraded once a while.

Adi
Offline gobigdave  
#12 Posted : Monday, December 3, 2018 3:11:53 PM(UTC)
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Adi,

That would be great! I'm looking forward to it.

Dave
Offline ROLLERMAN  
#13 Posted : Monday, December 3, 2018 3:46:05 PM(UTC)
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I highly recommend this: you can get them from Jtec.
IT will help you fine tune your wings so your trim is at neutral.

Incidence adjustment kit.PNG (1,617kb) downloaded 5 time(s).
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