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Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



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can't find the current thread

Post  roddie on Sun Jun 21, 2015 3:47 pm

Holy crap.. I think I'm in the wrong thread.. (almost a year to the day since last post?.. I know that can't be right..)

.... Edit: That explains it.. I guess I was in a locked Speed discussion thread. My apologies  Rolling Eyes

Oh well.. a discussion is a discussion.. and I've started building a model for the Tee Dee class.. to be launched by the dolly I wrote about in the thread I can't find.. Laughing

I digress.. Before I get too far.. I have a wing-area formula that I need advice on. Span is at the 15" mono-plane minimum. Root chord is 4" and tip chord is 2" symmetrical; root to tip. When I do the math.. this works out to the minimum 45 squares.. right?

This wing shape is for a T33. The wing's leading-edge has gussets extending out from the fuse, that will add an inch or two to the total area. I've laid out a 1/8" sheet balsa wing which will have functional tip-pods in the way of lead-out guide/tip-weight provisions.

The fuse is two laminations of 3mm luan plywood which might be overkill.. but it will be a strong rigid platform for mounting the engine and will be belly-notched for the pin in the launch-dolly's cradle. The model will land on it's belly.. so the ply will be tougher by itself than balsa would. I also thought it might help balance this design.

Not much done on the airplane yet.. but it's a start.



It's got a real short-coupled tail moment.. I thinking with the luan fuse; providing some symmetrical weight.. nose to tail, The lighter weight wing's position will be easier to get close to the scale position. I hope...

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Re: can't find the current thread

Post  Oldenginerod on Sun Jun 21, 2015 5:04 pm

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Re: can't find the current thread

Post  roddie on Sun Jun 21, 2015 6:10 pm

Oldenginerod wrote:Roddie.  Is this the dolly thread you mean?
https://www.coxengineforum.com/t8333-take-off-dolly-for-sm-profile-c-l-models?highlight=dolly

I'm talking about the speed discussion thread where I first mentioned my dolly concept. I thought it was last Fall.. but the link on the forum's left column directs to the original 50-page discussion thread that apparently was locked.. possibly a year ago. There's a new current discussion thread with 2015 activity.. but I couldn't find it. We have new members who have speed build info there.

I found it.. It's like the thread's been split.

https://www.coxengineforum.com/t7115p320-cef-speed-contest-design-discussions?highlight=speed
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Re: can't find the current thread

Post  getback on Sun Jun 21, 2015 6:35 pm

yes it was split and that got messing up my mine after the first speed race was finished Small Cox Logo O yea thanks for the rethread also Very Happy


Last edited by getback on Sun Jun 21, 2015 6:36 pm; edited 1 time in total (Reason for editing : thanks in order)
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Re: can't find the current thread

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