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Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

More info on this engine!




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Post  rdw777 Wed May 04, 2022 9:28 am

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Began covering on the Guppy…. The package on the covering material was labeled Papier De Soie…. Very exotic stuff!!!…Well, it also said tissue paper and I got it at the dollar store LOL!!…

Adhesive is white glue and water… Sealed with spar varnish… I know tissue can fade but hopefully the spar varnish will help…Wood grain shows thru but I’m OK with that…
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Post  rsv1cox Wed May 04, 2022 10:29 am

Looking great, but I didn't read how you are going to power it?

I built a Sterling Nieuport 28 using mostly Titebond, a change from the Ambroid/CA mix I was previously using. I love CA but was always gluing my fingers together.

Guppy, an appropriate name for it.
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Post  davidll1984 Wed May 04, 2022 11:18 am

I tink a .020 Would be perfect what is its size I think it was designed for .020 right? I am not sure Huh... i like the model this plane Gotta have safe landing To on that belly Thumbs Up
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Post  davidll1984 Wed May 04, 2022 11:37 am

Ho i wanted To say that litle pod look Nice the plane To look superbe We could imagine it with small floats on the wings to take off and land on the water a little something fishy this plane a bit like the AQUA-STAR SEAPLANE #502 Herr 1/2A Fuel Powered Balsa Wood Model Airplane that look more like a Flying Float lol! i wanted To build one back then I lived by a lake the catalina was on that list of sea plane
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Post  rdw777 Wed May 04, 2022 3:10 pm

Thanks guys, I thought I replied earlier but I guess it got lost in web world,

Yes, it will be powered by Peewee .020….. Remember the one I posted a few months ago that had the bent cylinder and 706 Jim fixed it?…. I wanted to build something relatively safe for that engine…

Yes, It does look kind of like a sea plane but definitely a dry land glider for me… I think it will give me some opportunity to fly small gas close to home…

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Post  davidll1984 Wed May 04, 2022 7:10 pm

Ho yes it will definitely be perfect for small places such as soccer field and basebal even smaller place i fly m'y litle .049 in smaler park somtime its a nice place Surrounded by tree blocking the wind RC Plane
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Post  getback Thu May 05, 2022 7:59 am

Coming along nicely this about the speed i build at when doing so Very Happy Looks like maybe you got the voltage thing figured out , hope so anyway . RC Plane Small Cox Logo
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Post  rdw777 Thu May 05, 2022 12:37 pm

Thanks, I like building so I don’t hurry it too much…I have the 5V regulators but am waiting on some switches I ordered…. Will make up a harness when that part comes around and do a little testing….
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Post  rdw777 Sat May 14, 2022 12:45 pm

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A little more progress….Just gotta finish a few details and install the radio…,An interesting thing happened on the wing… It was fairly floppy in its raw form but after three thin coats of the spar varnish wiped on it stiffened up pretty well… To the point I don’t think it will need any strapping tape “spars”… It will get a layer of Duck tape to protect leading edge however….

It got a 1/32 ply skid on its belly … Opportunities to fly close to home will be rough ground…
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Post  getback Sun May 15, 2022 6:17 am

Looks Good , I guess putting the varnish on the foam filled the pours a bit to make stiffer ? that's cool cause i have a R/C plane to build that is some foam .. Thanks for that ! Eyebrows Parts coming from China LOL tongue
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Post  rdw777 Sun May 15, 2022 5:14 pm

Thanks Getback… The foam on the toy glider wing is fairly open structure (cheap) and Im guessing the varnish gave it a bit of a skin on the surface that helped to resist flexing ….Maybe kind of like covering an open frame structure with film…Add surface tension…

If you coat foam with varnish please be aware it will yellow somewhat, …. Was OK with me on this project due to its vintage design…
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Post  getback Mon May 16, 2022 7:21 am

I will keep the yellowing in mind if I go that way , Kits still sealed and i got it from RSV Bob so it may just bee dust in it lol! Joke between him and me Old Bugger You still waiting on equip. ?
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Post  rdw777 Tue May 17, 2022 4:53 pm

Pretty much had everything except a switch… I had ordered some a couple of weeks ago but they have not come in so I had to find a donor…

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So I made up a switch harness…. The 5 V regulator is that black blob under the red connector…. I have 2 S 370 mah for power so will hook it all up tomorrow and see if I can keep the smoke in….

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It’s going to end up about 6.5 oz rtf…. Will give it some test glides when the wind dies down
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Post  rdw777 Thu May 26, 2022 1:37 pm

The right day finally came around to see if Guppy would fly so gathered up and went out to a flying site I’ve been thinking about….

Getting prepped for flight…Last photo just in case  Very Happy  

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I flew it a few times then set the phone up to video…. Grabbed a few still shots out of it…. The plane flew in and out of the frame too many times to be decent to post video….

Gets up to spec height on its .020…. High enough I can hardly hear it….

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About the engine, This is one I got from Bay and had a bent cylinder… Link to that party..

https://www.coxengineforum.com/t15523-peewee-020-bent-cylinder?highlight=Bent

706Jim offered to repair it and apparently he did an excellent job… It starts easy and runs stout for its 90 sec or so tank full of fuel…. Thank you again Jim, Your repair work is flying high….Awesome!! Very Happy

Gliding in to land….

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Flew it seven times…. The wing turned out better than I expected…. I think it’s appropriate for a would be Ace replica…. The 5V regulator for the rx worked out OK… It used every bit of 20 mah when I recharged the 370 2 S battery…. Worked out OK thought cause it’s all the forward in the nose and I didn’t have to add any weight to balance…

Off to search for micro thermals  Very Happy

Ace R/C Guppy - Page 2 C48f7810

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Post  Kim Thu May 26, 2022 2:02 pm

GREAT POST AND BUILD THREAD!!!!

CONGRATS ON BRINGING A CLASSIC TO LIFE!!!!!!!!!


Damn! Damn! Damn! Damn! cheers cheers cheers cheers cheers
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Post  rsv1cox Thu May 26, 2022 3:22 pm

Now that's a tailgate party. Congratulations and thanks for sharing.

Bob
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Post  GallopingGhostler Thu May 26, 2022 4:20 pm

rdw777 wrote:The right day finally came around to see if Guppy would fly so gathered up and went out to a flying site I’ve been thinking about…. [...] Off to search for micro thermals  Very Happy

Ace R/C Guppy - Page 2 C48f7810

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Congrats Robert on a truly successful build and venture. Photo above, I believe you may have an engine of the month winner if you can place over the empty blue sky merged as one photo, a an angled front/side photo of the engine and pod up close.
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Post  andrew Thu May 26, 2022 9:57 pm

Looks like you've built a winner, from a beautiful plane to a good flyer. Thanks for sharing.
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Post  getback Fri May 27, 2022 4:50 am

7 flights says it flys very good and sounds like you had a fun day out fling , hanks for sharing the build and fly !!! c RC Plane This Site Rocks!
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Post  rdw777 Fri May 27, 2022 1:44 pm

Thank you CEF FRIENDS …..It is the first gas powered plane I’ve flown in about twenty years…. Nice to tinker with the engines again!!…. Electric certainly has its place and I’ll always have one or two, but it just seems more alive with an engine screaming away …. I think I can get by with flying this one about a mile from the house…..

I may just take you up on the photo GG’r…. Nice idea Very Happy

Robert
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Post  Woody Fri Jun 03, 2022 7:39 am

That was a heck of a good thread.
I enjoyed reading how yer made her.
She's a keeper and winner.
Hats off and well done.
I think those tiny engines are kinda real cute.
Gonna have to get me one some day.
Jim is a genius for being able to fix it.
Happy flying .
Akways.
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Post  GallopingGhostler Fri Jun 03, 2022 9:10 am

rdw777 wrote:I may just take you up on the photo GG’r…. Nice idea Very Happy
I see Robert, you just did that, excellent! Clapping  cheers

CEF: Cox Engine of the Month - Submit Your Pictures June 2022, Post# 211822

rdw777 on Jun 2, 2022 wrote:PeeWee .020 - Ace R/C Guppy
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Post  rdw777 Fri Jun 03, 2022 11:48 am

Thanks Guys, Was a neat ride….I’m watching your Phantom too Woody, Fine craftsmanship Very Happy

GG’r… Was a neat photo idea…. My grandkids liked it Very Happy …. Your Ranger 30 un the photo contest is very nice, Well done!….. I built one when I was about fourteen…. New nothing about FF trimming but dumb luck got a few nice flights.

I went ahead and posted the video I took the stills from….Quality is not too good…. Was circling quite a bit just try and keep it in the phone’s frame…. Better flight profile is just fly it out straight and climb  till the engine quits and do big lazy circles back…

https://m.youtube.com/watch?v=XxR9YvOdRI8
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Post  GallopingGhostler Fri Jun 03, 2022 1:11 pm

rdw777 wrote:Your Ranger 30 in the photo contest is very nice, Well done!….. I built one when I was about fourteen…. New nothing about FF trimming but dumb luck got a few nice flights.

I went ahead and posted the video [...] Was circling quite a bit just try and keep it in the phone’s frame…. Better flight profile is just fly it out straight and climb  till the engine quits and do big lazy circles back…

Robert, I thoroughly enjoyed your maiden flight. It reminds me a lot on how my 1973 Top Flite Ken Willard's 27" (short wing version) R/C Schoolboy with Pee Wee flew, flight characteristics very similar. Then, I learned that if I replaced the factory 4.5x2 props with a Top Flite white nylon 5.25x3 prop (much more durable - Cox props were brittle, expensive, often only got a couple flights out of them, a dead stick nose over would break the prop. Sad ) then I got a minute more flight time over the usual 1.5 minutes to 2.5 minutes, but at the same flight speed.

The Top Flite nylons were nearly indestructible, but were notoriously out of balance. I bought a balancer from Ace R/C (used 2 double edged razor blades), sanded the back side of the heavier blade until balanced. For only $0.35 apiece, (Coxes were over a dollar! Shocked ), they were the right ticket. Thumbs Up The Pee Wee is a torquer. Today, since the T/F nylons are no longer available new, I need to find a suitable substitute.

The photos of my Ranger are posted on Outerzone:

Outerzone UK: Ranger 30 (oz3830)

I supplied Steve with my scan in B&W of the CG Ranger instruction sheet. The parts traces came from another.

Here is a photo that is not on Outerzone, shows better proportions without camera wide angle distortion:

Ace R/C Guppy - Page 2 Goldbe20

Please note, I have not maidened it yet. Where I live in the higher desert, there are few trees on this open high plains, there is rarely a calm day. Most of the time have at least a 15 MPH wind or greater. This has limited me from flying half-A R/C, going to slightly larger A's (.09 to .15, C/L .15 to .35).
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Post  getback Sat Jun 04, 2022 8:26 am

That's a shame about the wind all the time that would drive me nuts . One Nice looking plane George ! RC Plane The Guppy looks good up in the air and seemed to fly very well !!
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