stunthanger.com
General control line discussion => Open Forum => Topic started by: Brent Williams on January 22, 2016, 09:23:59 PM
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Has anyone used the carbon profile landing gear from Hobby King? http://www.hobbyking.com/hobbyking/store/__66462__Carbon_Fiber_Landing_Gear_for_Profile_Model_40_60_Class.html
How about the "Carl Goldberg" Composite Profile Landing gear on ebay? http://www.ebay.com/itm/New-Carl-Goldberg-composit-profile-model-airplane-landing-gear-Du-Bro-nitro-/281912384339?hash=item41a3499b53:g:GVMAAOSwRLZT-npx
Hobby King:
(http://www.hobbyking.com/hobbyking/store/catalog/66461(3).jpg)
Goldberg:
(http://i.ebayimg.com/images/g/GVMAAOSwRLZT-npx/s-l1600.jpg)
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Steve Yampolsky posted about the Hobby King gear on SSW back in August. Sounded like he liked them. They were out of stock shortly thereafter. Good to hear they are back in.
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Says they're still out of stock. I'm on email alert, maybe I'll beat the hoarders next time. One thing about CF gear, if you don't like the angle or the length you can't do much about it. Brodak makes a nice thick profile gear Item#BG-1776
Not sure the Carl Goldberg unit is carbon fiber, I'd almost bet it isn't.
MM
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Interesting. They must get them 2 pair at a time, because that's how many I ordered last night after seeing this post, and my order says they were in stock. But now they are back out...
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Make your own! It is easy, cheap, and fun!
Joe
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What kind of glue do you use?
MM
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Epoxy.
This size item would be a good size practice item for vacuum bagging.
Phil
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There are many types of epoxy, most of the hobby shop epoxy is too thick for making structural lamination.
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Epoxy.
Where do you get landing gear epoxy?
MM
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Try "West System" It is used to build boats and stuff.
Phil
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This is for R/C plane but process would be similar, just not as involved as he is doing. Appears to be a "perfectionist type", not that this is wrong mind you, maybe just taking more time and effort for the video. Thought there was something on stunthanger in the past about making C/F landing gear but couldn't find it.
https://www.youtube.com/watch?v=gsDAsSw20d8
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I thought Sparky did some at one time. Also Randy Powell. I have one of the RSM gears in the shop for full bodied plane.
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I thought Sparky did some at one time.
I thought so too but could not find it.
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I've 'rolled my own' in the past, with limited success. In my instance it was to match a broken curved set off a semi scale pattern plane, and so were curved (think extra 300) and about 18" in track width..
Basically I traced the shape onto a block of 3" wide wood, and made two saw cuts about 3/16" apart in the curved shape of the landing gear, and then glued some clear plastic to the blocks as my release surface, No finishing the mould this way.
I then added strips around the edge to create a well for the carbon to lay into, on the top piece only, about 1/8" thick, this gave me my cut line (and was all within the 3" block, (the gear was 2 1/2" wide)
I then layed up my landing gear with two layers 200gsm carbon on the outside, and a pile of fibreglass unidirectional strands on the inside. I then clamped the top and bottom blocks together and came back in a few days and trimmed it all down to size.
I stuck in on the plane and was saddened to see it sag badly under the weight of the 11 pound plane, so I went to a buddy who builds aluminum boats and got him to cut me an ali landing gear set.
What I didn't know at the time was that I needed to post cure the part for a lot longer and at a lot higher temperature than I thought (8 hours in the back of the car is not enough).
Some years later I found that set and was suprised to find it had cured and was easily as strong as the aluminum set.
So, word to the wise, POST CURE!!!
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I thought Sparky did some at one time. Also Randy Powell. I have one of the RSM gears in the shop for full bodied plane.
https://www.youtube.com/watch?v=4DGaRpP_OF0
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Well look at that.
:D
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So you just use regular old soft epoxy not something like Epon 815/Teta hardener? Is that ACP Easy Lam any good for making props?
MM
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Some good info here—thanks to those who've posted.
Does anybody have any suggestions as to width and thickness for various model weights?
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Looking at the above videos on making a landing gear, it is a major project to make one.
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Some good info here—thanks to those who've posted.
Does anybody have any suggestions as to width and thickness for various model weights?
There are 6 videos in the series and in the last one he makes recommendations.
Phil