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Cox Engine of The Month
Need help with a foam wing control line build
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Need help with a foam wing control line build
I'm building a control line plane using a 48" foam wing. Wing under. It's running an old K&B 35. It's a profile with a slot cut over the wing to accommodate the bellcrank. I'm needing help on how to run the lines over the wing and off the wing tip. I'm thinking of attaching two tubes on the end of the wing to run the lines through but I'm stumped how to attach the tubes at the wing tips any ideas?
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Levent Suberk- Diamond Member
- Posts : 2204
Join date : 2017-12-24
Location : Türkiye
Re: Need help with a foam wing control line build
Most of my combat planes are foamies with exposed bellcranks. One thing I always try and do is to make the bellcrank sit as tight to the wing as physically possible. Sometimes this even requires a bit of sculpting of the foam for pushrod clearance. I probably wouldn't like to do so on a stunter. The problem I have come across is that the inboard wing wants to fly tip high when upright. This may not be the situation on a profile stunter. A combat model without a fuse in my experience requires a bit of warping the outboard panel for compensation. What I have noted is that some of the guys have melted a guide through the wing tip. They heated a 1/8" piece of tubing and entered the end of the wingtip slightly below the centerline of wing. They pretty much eyeball it and come up from the entrance through the top of the wing which usually exits on the top a few inches back from end of wingtip. Dubro nylon antennae extension is then epoxied into the hole and sanded flush to the wing and tip.
The main thing here is that you have no reference for leadout exit. Due to being a stunter, I would opt for a slider for adjustments.
The main thing here is that you have no reference for leadout exit. Due to being a stunter, I would opt for a slider for adjustments.
Ken Cook- Top Poster
- Posts : 5476
Join date : 2012-03-27
Location : pennsylvania
Foam Wing help
Thanks for the quick response. Picture and comments gives me a lot to work with. I'll post some pics before and after the first flight.
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Re: Need help with a foam wing control line build
I love your color combo and the quality of your work. Hope your flight is successful.
rsv1cox- Top Poster
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Posts : 10602
Join date : 2014-08-18
Location : West Virginia
Re: Need help with a foam wing control line build
Wow! That looks really good. What are the line guide loops made from?
_________________
Never enough time to build them all...always enough time to smash them all!
944_Jim- Diamond Member
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Posts : 1955
Join date : 2017-02-08
Age : 59
Location : NE MS
Line Guides
944_Jim wrote:Wow! That looks really good. What are the line guide loops made from?
The guides are just wood threaded metal loops. They are threaded & glued in into a strip of plywood. There is another strip under the wing and it's all sandwiched with small bolts. (hope it holds)
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Re: Need help with a foam wing control line build
Looks really good! Good luck with your flights.
TLAnderson- Gold Member
- Posts : 242
Join date : 2016-07-21
Location : Northern Wisconsin
Re: Need help with a foam wing control line build
The plane looks great Rick hope the maiden go well !!
getback- Top Poster
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Posts : 10138
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Need help with a foam wing control line build
Ricksrod wrote:getback wrote:The plane looks great Rick hope the maiden go well !!
The First Flight went great! Even on 60" lines I got a little dizzy. That K&B 35 did a great job. The home made "Stooge" worked well too. I just kept level flight to see how she did. Looking forward to my next flight.
With 60 inch lines I would think you were a whirling dervish. No wonder you got dizzy.
Seriously, glad your first flight with it went so well. Earns a greenie.
Bob
rsv1cox- Top Poster
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Posts : 10602
Join date : 2014-08-18
Location : West Virginia
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Re: Need help with a foam wing control line build
Good to hear everything went well Plane looks good with decals and what size tank is that ?
getback- Top Poster
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Posts : 10138
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Need help with a foam wing control line build
Thanks! It's a 6 oz tank. That K&b 35 likes the fuel a lot! Was going to fly today and discovered I had left my control handle at the park. I ran over there but it was gone. Had that handle since 1975 or so.
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
Re: Need help with a foam wing control line build
Well taht Sucks sorry to hear it was not there , heck i would make a sign saying it was left there with a 5- reward ,, man thats alot of fuel LOL how long will it go with that much or do you know yet ?
getback- Top Poster
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Posts : 10138
Join date : 2013-01-18
Age : 66
Location : julian , NC
Lost Handle
getback wrote:Well taht Sucks sorry to hear it was not there , heck i would make a sign saying it was left there with a 5- reward ,, man thats alot of fuel LOL how long will it go with that much or do you know yet ?
Took your advice and posted a pic. and reward at the park. Got a call from a maintenance worker today that found it! Handle is back safe and sound.
Thanks for the tip!
Ricksrod- Bronze Member
- Posts : 57
Join date : 2019-08-20
Age : 74
Location : Northern Calif.
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