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Cox Engine of The Month
November-2024
Kim's

"A Space Bug Jr. pulls the Q-Tee up high over Sky Tiger Field"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
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Post  rsv1cox Sat Sep 14, 2024 6:25 pm

"Coat with sanding sealer and let sit for a couple more days."

Ha, it's been just hours and I'm already messing with it. I'm terribly impatient, born that way. It has got me in trouble many times throughout the years but has saved me time too.

I thought - it can dry completely on the plane as well as off so........

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Trim to fit, a 2/56 crossbolt like JW's aluminum crimp in the back, a small hole with the pilots head sticking up, a windshield. Paint to match or maybe just matte black the addition for contrast.
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Post  Kim Sun Sep 15, 2024 1:06 pm

Don't know if this has been posted before, but figured it might be worth it:

A Firebaby ad from the October 1970 American Aircraft Modeler.


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Post  rsv1cox Sun Sep 15, 2024 4:58 pm

Thanks for chiming in Kim.

My take-away from that ad is that the control handle costs three times as much as the airplane. Quite a step up from the enclosed .25 wood or plastic handle normally enclosed with the kit.

Trimmed the enclosure. Maybe I can split and use the cut-off to fill the void in the back and taper sand.

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Post  rdw777 Thu Sep 26, 2024 2:53 pm

Firebaby Flies Thumbs Up

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Post  rsv1cox Thu Sep 26, 2024 6:36 pm

About two minutes of line tension and the poles flashing by.....dizzying just watching. How did you fill the baloon and how much fuel did you load?
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Post  rdw777 Fri Sep 27, 2024 3:28 am

Hi Bob, I was putting 8 cc’s in the tank and it would run the engine for about 3-1/2 minutes….. Plenty of time to set the needle and not have to hurry to the handle to get about two min flying time….. Yes, I got very dizzy…. Has been a long time since I last flew CL….Those lap times are way too fast for this 66 yo….. The prop was a Cox 6-3 cut down to 5-1/2 for ground clearance…. If I were to try it again I’d look for a 2” pitch prop….

I filled the tank with a large syringe…. The balloon is a 7” party balloon so it’s big enough that it never goes under pressure…..First pulled the 8 cc’s into the syringe then hook up to the tank…. Then collapse and pull all the air out of the tank…. Then point the nose of the plane down and inject the fuel…. Then retract the syringe to pull out any remaining air from the back end of the tank…. Reconnect fuel line and go…..

I got to fly it three times and really enjoyed the experience even thru the dizzy’s…. .I had originally thought about building a clone but glad I had a chance to fly an original….Felt pretty awesome….Your rebuilds of old beat up models and engines was a big inspiration for this project….
Thanks Very Happy

Robert
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Post  049kid Sat Sep 28, 2024 7:25 am

I enjoyed the flying video,love period engines and planes,wow that wasp is super clean and sounds healthy,now you got me wanting to pull out my wasp and put it on something
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Post  roddie Sat Sep 28, 2024 10:38 am

Robert, That vid was thoroughly enjoyable! Thanks also for sharing the info. on fueling the balloon tank. Thumbs Up
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Post  rdw777 Sat Sep 28, 2024 1:46 pm

Thanks 049kid!…. The Wasp turned into a nice handling engine after it was ran several times… Really easy to start….Also the lightest of the bunch of early .049’s….

Thanks Roddie…. The balloon tank and filling it was sorta based on the original Firebaby tank….Andras (@balough) has come up with a more refined version that has two lines and super efficient on getting the air out…. I use them on a couple of other planes and they work great …. Maybe he will share a little more on those Very Happy….. Would be perfect for your race boat Thumbs Up
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Post  TD ABUSER Sun Sep 29, 2024 11:29 am

rsv1cox wrote:Thanks for chiming in Kim.

My take-away from that ad is that the control handle costs three times as much as the airplane.  Quite a step up from the enclosed .25 wood or plastic handle normally enclosed with the kit.  

Trimmed the enclosure.  Maybe I can split and use the cut-off to fill the void in the back and taper sand.

Jim Walker Firebaby  - Page 5 P1018230
Jim Walker Firebaby  - Page 5 P1018229
She was really flying great..!
Too bad the RTF model companies moved from wood to plastic.
My first SATISFYING CL model experience was the Goldberg Lil Whizard on 26 foot dacron string.
Before that I had a Cox plastic P40 that flew on 15 feet of string [if I recall correctly] and that wasn't nearly as satisfying as flying the Goldberg balsa wood model with a Cox Black Widow .049.
Of course building the model with Sigment glue was part of what made that experience all the more satisfying.
Sigment was pretty good stuff, I would use it instead of CA if I could find it.
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Post  rsv1cox Sun Sep 29, 2024 12:22 pm

Oh oh........did you have to post that picture..............Smile I put that idea on the back burner.....way on the back burner. I just can't make it work to anything worthwhile.
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Post  rdw777 Sun Sep 29, 2024 12:53 pm

Thanks TD…. I had forgotten how much fun CL could be….The recommended line length was 25 ft…. I fudged them to 27.5…. I think it would do 30 just fine on a calm day….

I’m going to send you you a soap bottle canopy Bob when I get caught up with a small parts project I am working on Thumbs Up

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Post  rsv1cox Sun Sep 29, 2024 12:59 pm

Thanks Robert.

Contrails........That's one powerful Flybaby. Smile
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Post  rsv1cox Tue Oct 08, 2024 8:49 am

Roberts gifted and personally hand crafted Palmolive bottled canopy arrived yesterday. A perfect fit.

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I appreciate it Robert. I know that it took a lot of time and fiddling to get it that way, a big improvement over what I had in mind for it.

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Post  rdw777 Tue Oct 08, 2024 9:36 am

Beautiful old bird Bob…. It wears its time gracefully….. One last thing to do (IMO Very Happy )….
Is to shine up the metal fin/rudder to match that nice shiny Bee on the front….I think with a Bee on it, 35’ lines on a very calm day would bee pretty sweet Very Happy
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Post  getback Wed Oct 09, 2024 7:28 am

Thats cool you got some flights in on the old bird , the wasp seem to pull it pretty good and sounded good to Very Happy This Site Rocks!
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Post  rdw777 Wed Oct 09, 2024 11:28 am

Thanks Eric, It was a treat to fly the 71 year old plane…..After the flights I took it apart and gave it a detailed cleaning and pickled the engine….. Before I put it back together I’ll trace it and make a drawing so that it could be replicated if one wanted to…

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Post  TD ABUSER Wed Oct 09, 2024 10:25 pm

rdw777 wrote:Thanks Eric, It was a treat to fly the 71 year old plane…..After the flights I took it apart and gave it a detailed cleaning and pickled the engine

What a great job you did..!
How do you pickle the engine...?
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Post  rdw777 Thu Oct 10, 2024 9:25 am

Thanks TD!…. I don’t think it will be flying again any time soon so I removed the glow plug and rinsed the engine out with alcohol…. Dried good then a liberal application of air tool oil inside and out….
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Post  rsv1cox Thu Oct 10, 2024 10:53 am

rdw777 wrote:Thanks TD!…. I don’t think it will be flying again any time soon so I removed the glow plug and rinsed the engine out with alcohol…. Dried good then a liberal application of air tool oil inside and out….

My after-run SOP Robert, only I flush with RemOil, blow it out with compressed air then the ATO.  The reward when flipping the prop to distribute the oil is listening to that nice Cox engine compression pop.

Either way works best and is a whole lot better than just letting the engine sit.
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Post  TD ABUSER Thu Oct 10, 2024 11:58 am

rdw777 wrote:Thanks TD!…. I don’t think it will be flying again any time soon so I removed the glow plug and rinsed the engine out with alcohol…. Dried good then a liberal application of air tool oil inside and out….

Yeah..you might as well put it away until a new generation of boys come along that don't have neon pink hair and don't think that they are cats. ....lol!
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Post  rdw777 Thu Oct 10, 2024 2:22 pm

RemOil is one of things that has been on my “to get” list for a long time Bob…. I know it’s done some wonderful work for you…. To the front of the list now!!!….

LOL TD!!!….I remember with fondness when common department stores had gas powered flying models on the shelves…. Along with fuel and ignition source….. I’m glad we had that life experience to learn from…
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Post  rsv1cox Thu Oct 10, 2024 3:25 pm

rdw777 wrote:Beautiful old bird Bob…. It wears its time gracefully….. One last thing to do (IMO Very Happy )….
Is to shine up the metal fin/rudder to match that nice shiny Bee on the front….I think with a Bee on it, 35’ lines on a very calm day would bee pretty sweet Very Happy

You shamed me into it Robert.  Smile.........but I get a Z for effort.  Seems I don't have your knack for this.

Before......

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During.......

Kitchen sink cleaner didn't do much, got the Mothers from the Garage, not much better.

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After........

Fixed with a dot of Formular 560.  I figure 4 circles and I will be looking for it in the grass.

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Post  rsv1cox Thu Oct 10, 2024 3:32 pm

rdw777 wrote:RemOil is one of things that has been on my “to get” list for a long time Bob…. I know it’s done some wonderful work for you…. To the front of the list now!!!….

LOL TD!!!….I remember with fondness when common department stores had gas powered flying models on the shelves…. Along with fuel and ignition source….. I’m glad we had that life experience to learn from…

It's good stuff Robert.  I keep a can in all my workspaces.  Hand chainsaws were covered in mud and grass from cutting off roots.  Major clean and lube this afternoon with new chains installed.

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Post  rdw777 Thu Oct 10, 2024 3:57 pm

Love it!…. Gotta take the bling wherever we can get it!!…. That’s akin to polishing the mirrors on a 56 Chevy Very Happy

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