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Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



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New TD .010 and Pee Wee .020 Planes

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New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Fri Jul 14, 2017 3:01 am

I've been restoring/repairing a lot of old Cox engines lately which has made me daydream about planes that would be a good match for whichever engine I was working on at the time. As I tinkered with refurbishing a couple of TD .010s, I realized that I didn't currently have an airworthy .010 plane. I also have a couple of Pee Wees that will be finished soon and I've never had a Pee Wee powered plane. I used to fly my LaStick with a TD .010 years ago when I built it. It was fun but performance was lackluster as my flying skills improved. I converted it to a TD .020 and have had a ball flying it lik
e that for years since. So, I started with the LaStick design and shrunk it to 75%. Reshaped the tail and eliminated the triangular wingtips to make it look a little less Stickish. Span will be about 15". Looks like they will be small and spritely to fly. Do you guys think the airfoil will work ok shrunk down like this without reshaping it? I once shrunk a model plan by 50%. The original was a super friendly docile flyer. The half-size version was very hot and would stall or snap at the drop of a hat if it was maneuvered abrubtly or slowed a bit too much in a turn. A completely different airplane than it's full size counterpart.
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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Fri Jul 14, 2017 5:20 am

Friend, thumb up !, I like your projects, I'll be watching your progress! ... good luck.
I'm still working on my two models for 0.049 and 0.051 ... a hug! Thumbs Up
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Fri Jul 14, 2017 6:09 am

Thanks, Mauricio! I always enjoy watching your model vids on the tube. I already have a couple of projects in the works for a TD .020 and reedie .049. Stay tuned for those. These little guys are "extra" projects I'll be working on during the breaks. Smile Actually, I'm leaving town on a motorcycle trip, so the model building and Cox engine work should resume in a few weeks.
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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Fri Jul 14, 2017 7:12 am

Tee Bee wrote:Thanks, Mauricio!  I always enjoy watching your model vids on the tube.  I already have a couple of projects in the works for a TD .020 and reedie .049.  Stay tuned for those.  These little guys are "extra" projects I'll be working on during the breaks. Smile Actually, I'm leaving town on a motorcycle trip, so the model building and Cox engine work should resume in a few weeks.  

Thanks! I like to share the videos for just that other people can also appreciate the result and performance of these small engines, ie very small displacement. They are a little jewel
..... from here I wish you a happy trip !, surely in this same post we can see some photos of some parts of the tour! ... a hug!
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Re: New TD .010 and Pee Wee .020 Planes

Post  Kim on Fri Jul 14, 2017 7:25 am

It would appear that the upcoming S.M.A.L.L. Fly-In (I know: it's next year, but I like the   term) is gonna have a lot of hot little Bees blasting around the place....

P.S. Edit: Please take care on the bike !
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Fri Jul 14, 2017 10:55 am

Yes and will do, Kim. Thumbs Up
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Re: New TD .010 and Pee Wee .020 Planes

Post  happydad on Fri Jul 14, 2017 12:55 pm

Tee Bee wrote:I've been restoring/repairing a lot of old Cox engines lately which has made me daydream about planes that would be a good match for whichever engine I was working on at the time.  As I tinkered with refurbishing a couple of TD .010s, I realized that I didn't currently have an airworthy .010 plane.  I also have a couple of Pee Wees that will be finished soon and I've never had a Pee Wee powered plane.  I used to fly my LaStick with a TD .010 years ago when I built it.  It was fun but performance was lackluster as my flying skills improved.  I converted it to a TD .020 and have had a ball flying it lik
e that for years since.  So, I started with the LaStick design and shrunk it to 75%.  Reshaped the tail and eliminated the triangular wingtips to make it look a little less Stickish.  Span will be about 15".  Looks like they will be small and spritely to fly.  Do you guys think the airfoil will work ok shrunk down like this without reshaping it?  I once shrunk a model plan by 50%.  The original was a super friendly docile flyer.  The half-size version was very hot and would stall or snap at the drop of a hat if it was maneuvered abrubtly or slowed a bit too much in a turn.  A completely different airplane than it's full size counterpart.  

I always thought a good rule of thumb was the wing chord should be 1/4 to 1/3 the length of the plane frame. It looks a little short to me.
My personal view. happydad
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Re: New TD .010 and Pee Wee .020 Planes

Post  xplaneguy on Fri Jul 14, 2017 10:45 pm

Keep building; remember....we need a 100+ next year! Wink

Evelyn and I wish you and Angie safe travels. Have fun!! Smile
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Sat Jul 15, 2017 1:46 am

Thanks! I hope Evelyn is having a good summer. Angie's not going on this trip. Since she got asthma a few years back, she doesn't do well at high elevations. Ended up in the hospital last time we camped up there with very low O2 in her blood and dehydrated. I had to take her down to 5000ft to get her better. Since then, she's been diagnosed and has meds for it but she's working to build up her lung capacity with more exercise before trying the mountains again. I'm traveling with my friend, Rob, whom I used to work with. He rode with me last year to NM and CO and had a blast so decided to come along on another adventure. I have a much bigger and more challenging ride planned in 2 years, and he's feeling it out to see if that sort of thing is for him before committing. I should be back to work making balsa dust in a couple of weeks.
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Re: New TD .010 and Pee Wee .020 Planes

Post  roddie on Sat Jul 15, 2017 8:28 am

Good luck on the road-trip Troy. I enjoyed reading your recent posts on the prep, in Bob's motorcycle thread. Also.. great job on the testing of the new NVA/venturi from EXmodel Engines! I'll be curious to see the progression of this airplane when you return.
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Sat Sep 23, 2017 4:30 am

Here's an effort to keep this thread alive and valid.  Work on these little planes has been sporatic but they are beginning to take on 3 dimensions now.  More to come...


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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Sat Sep 23, 2017 5:33 am

good that you resume this post Smile , how many channels will you use for each model?
Will you set the throttle or the engines will be fixed?
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Sat Sep 23, 2017 5:44 am

Thanks. These will be basic 2-channel rudder/elevator planes without throttles. Just simple small glow powered sport planes.
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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Sat Sep 23, 2017 6:13 am

Tee Bee wrote:Thanks.  These will be basic 2-channel rudder/elevator planes without throttles.  Just simple small glow powered sport planes.

Okay, perfect! ... What kind of servants do you usually install?
I have had some drawbacks in some of the servos I used. I have noticed a low quality in welds and also in materials.
This for example is a Turnigy 1800A, which disconnected a cable, I notice that the original welding and surpassed the temperature wise ...

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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Sat Sep 23, 2017 6:29 am

I've had pretty good luck with Dymond 4.7 servos in my 1/2A planes, so I recently aquired a bunch of them to use in my current Cox powered build projects. Hopefully, they will continue to serve me well.
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Mon Sep 25, 2017 3:03 am

Moving slowly along. Firewalls epoxied on, engines mounted, and started framing another wing panel. The TD .010 and Pee Wee .020 are 2 of many Cox engines that I recently revived from the dark recesses of cobwebs and ancient castor goo. All new fuel lines, gaskets, o-rings, etc. as well as thorough cleaning, oiling, and piston resets.


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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Mon Sep 25, 2017 5:39 am

I see those engines in very good shape !, have been as new! Thumbs Up Do you use the same fuel for both?
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Re: New TD .010 and Pee Wee .020 Planes

Post  getback on Mon Sep 25, 2017 8:40 am

The two are coming along NICELY Tee Bee Very Happy they should make some fun flys for you when completed . RC Plane Popcorn
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Mon Sep 25, 2017 10:58 am


Thanks for the motivation, guys!  Mauricio, I use the same blend of fuel in all my Cox engines to keep life simple.  I mail order Sig Champion 25 in quart bottles and add 1.5oz of Klotz castor oil to each bottle for a bit more slippy goo. Smile I actually have another Cox powered project in the works that I haven't shown on this thread.  It's called a Sliver and was designed by Steve "skaliwag" Adams who also runs Select Models.  It's a beta test for his design to determine how it works out and whether he will produce it as a kit some day.  It has a 24" span and will be powered by a TD .020.  The Sliver has been a much more challenging build than these 2 little planes and there is a thread about it's construction over on the RCU 1/2A forums.  I'll post pics of it in a separate thread. Lots of irons in the fire right now but I love this hobby!
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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Mon Sep 25, 2017 6:49 pm

Tee Bee wrote:
Thanks for the motivation, guys!  Mauricio, I use the same blend of fuel in all my Cox engines to keep life simple.  I mail order Sig Champion 25 in quart bottles and add 1.5oz of Klotz castor oil to each bottle for a bit more slippy goo. Smile I actually have another Cox powered project in the works that I haven't shown on this thread.  It's called a Sliver and was designed by Steve "skaliwag" Adams who also runs Select Models.  It's a beta test for his design to determine how it works out and whether he will produce it as a kit some day.  It has a 24" span and will be powered by a TD .020.  The Sliver has been a much more challenging build than these 2 little planes and there is a thread about it's construction over on the RCU 1/2A forums.  I'll post pics of it in a separate thread.  Lots of irons in the fire right now but I love this hobby!  

on the contrary !, thanks to you for sharing your projects and information! ... one of the things that has cost me personally is to get the engine Pee Wee 020 maintain the running speed even, this is due to internal movement of the flapper valve, even when one accelerates and decelerates the patches, the valve by internal pressure moves more and it is complex to make it always work pair.
In some Pee Wee I had to change the G-ring to one of the smaller section, and thus make it work more regularly!
In your case you will leave it fixed and therefore will tend to make your march more stable and even!
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Thu Sep 28, 2017 9:01 am


The first wing has been joined and sheeted.  Molly inspected it but was not impressed.  It's never good enough for the cats.
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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Thu Sep 28, 2017 10:41 am

Tee Bee wrote:
The first wing has been joined and sheeted.  Molly inspected it but was not impressed.  It's never good enough for the cats.

mmmm, is not that okay? Huh...  ... will pass the inspection test? Huh...  ... I think finally Molly will give the good vísto! Very Happy  ... maybe need a candies to tilt the balance cheers haha
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Sun Oct 01, 2017 4:01 pm

Wings have been framed up, joined, sheeted, and sanded.  Sometimes I forget just how much time and effort it takes even to finish little models like these.

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Re: New TD .010 and Pee Wee .020 Planes

Post  MauricioB on Sun Oct 01, 2017 9:53 pm

Tee Bee wrote:Wings have been framed up, joined, sheeted, and sanded.  Sometimes I forget just how much time and effort it takes even to finish little models like these.


Friend Tee Bee, your comment is correct ... how many times am I in my club and one of my friends tells me: - make a small model ... that does not take time ... and I respond: Until you get to work in one! Eyebrows
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Re: New TD .010 and Pee Wee .020 Planes

Post  Tee Bee on Wed Oct 04, 2017 4:30 am

...and a dash of color is added to the mix.
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Re: New TD .010 and Pee Wee .020 Planes

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