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Sterling Olympic Challenger

Old 04-19-2023, 02:36 PM
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plumberdeluxe
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Default Sterling Olympic Challenger

Anyone interested in seeing this kit built.
I just pulled it out of the pile today and am thinking about tossing it together.
I'm thinking a Thunder Tiger GP bushing 40 would be a perfect engine for this little guy.
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mikeainia (05-20-2023)
Old 04-19-2023, 03:01 PM
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Originally Posted by plumberdeluxe
Anyone interested in seeing this kit built.
I just pulled it out of the pile today and am thinking about tossing it together.
I'm thinking a Thunder Tiger GP bushing 40 would be a perfect engine for this little guy.

This is the Olympic Challenger kit. I always liked the looks of it and am looking for a small kit to build to burn a little time. It looks to me that most of the hardware included in the kit needs replaced with modern hardware.

Last edited by plumberdeluxe; 04-19-2023 at 03:31 PM.
Old 04-19-2023, 03:20 PM
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Kit contents and photo

Kit contents and military cover scheme



Last edited by plumberdeluxe; 04-19-2023 at 03:22 PM.
Old 04-19-2023, 04:38 PM
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Default Yes...DO IT...

I always enjoy a good build thread.
Great way to get Ideas, and see how others may tackle certain task.
plus it just PLANE fun
Old 04-19-2023, 04:42 PM
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Default How old is it?

Are there any dates on the box, plans or manual. Or do you remember when you bought it?
I don't remember that one.. Should be a fun plane..
Old 04-19-2023, 05:01 PM
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I got it from a guy on the classifieds and Iím guessing 1975 or so. It is kit RC-39. There is a section on the plans where it was folded and is completely brown from age. Wood is actually in great shape but cutting is pretty bad.
Old 04-20-2023, 04:37 AM
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Here is the questionable hardware. I will replace it all with modern stuff and build the nose instead of the plastic cowl. Dig that front strut with no steering
Old 04-20-2023, 04:39 AM
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Here is the tail moments all built and hinged up pretty much ready to cover. Iíll set them aside for now and start the fuse
Old 04-20-2023, 05:20 AM
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Great to see another build.
Old 04-20-2023, 12:23 PM
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Here are the fuse parts ready to be assembled, it took quite awhile to separate them cleanly from the trees. I think I know why so many guys scratched kits back in the 70ís. It was probably quicker and easier than getting kits to assemble strait and clean

Fuse sides complete and ready to assemble

Feeling pretty good about this warranty being included. Lots of nostalgia here. Warranty not so much

Formers and landing gear ribís assembled ready to install
Old 04-20-2023, 03:06 PM
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It looks like getting this fuse straight will be the biggest challenge that Iíve run into yet. Wood fit is really tough around the formers and it seems almost every piece will need to be altered to get a nice fit. Iím thinking it will be ok but canít get in a hurry when parts fit this poorly.

Fuse loose layup


Fuse sides

Last edited by plumberdeluxe; 04-20-2023 at 03:09 PM.
Old 04-22-2023, 08:49 AM
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Here is the fuse starting to come together, it looks like it will be pretty light when completed.
I have room for an 8 oz. tank so my choice for engines is either a Super Tiger .29 abc or a Thunder Tiger .40 gp. The ST weighs 11.8 oz. and the TT weighs 11.4 oz. Looks like the bushing 40 gets the nod



Old 04-22-2023, 10:00 AM
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Here is where I start changing out hardware that come supplied with the kit and start adding what I think will work better. Above is the 1/8 landing gear and steel mounts that came with the kit. Below is a decent set up of 5/32 gear and a Dave Brown .40 mount which allows me nose steering. I will be using the lower set up.
Old 04-22-2023, 12:48 PM
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A little more changing as the fuse comes together, I decided to sheet the cockpit area instead of adding plastic windows. The windows can be replicated with a piece of Ultracote and save the hassle. Tank is in, mount with steering arm, throttle cable, so engine now can be mounted. I will then shape a nose of balsa and toss the plastic cowl.




Last edited by plumberdeluxe; 04-22-2023 at 12:55 PM.
Old 04-23-2023, 04:53 AM
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The old plane is coming along nicely. You'll be flying it in no time.
Sure does bring back memories of the past...

Old 04-23-2023, 06:35 AM
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Thank You
I'm actually having fun with it, regardless of all the things I don't like about the kit.
I will try to keep this under 4 pounds flying weight, not sure how that will go yet.
So far things have been going well considering all the changes.
It's fun to try and bring life to these old kits..............
Old 04-23-2023, 09:00 AM
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Here the nose is roughly shaped and engine temporarily installed. Next is to pull the engine, fuel proof the compartment and sand and finish shaping. Iíll set the fuse aside for now and start the wing assembly. I think it will clean up nice and look fine once covered. All up weight on fuse,tail feathers, and engine is 1 pound 9.4 ounces.




Last edited by plumberdeluxe; 04-23-2023 at 09:40 AM.
Old 04-23-2023, 01:03 PM
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Here is my favorite piece of the entire kit. This is the area of the plans I talked about being discolored almost to a brown color. It shows you just how long this kit sat untouched in someoneís shop.
Old 04-24-2023, 10:01 AM
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I started a wing today and was surprised at how well it went even

Die cut ribs

Wing bottom

Wing top
with all the die cutting issues. It went fairly smooth with few problems. It feels fairly strong and is complete minus a wing tip and the center sheeting. All up weight so far for this wing is 3.3 ounces. Not bad considering 4 pounds is my target weight.
Old 04-24-2023, 11:37 AM
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First wing is built and set off to the side. All up weight ended up being 4 oz. With only the aileron left to add. It turned out light and straight. Off to the next wingÖ.

Old 04-24-2023, 03:41 PM
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Isn't it crazy how the design "technology" has changed over the years.
Look at the size of the control surfaces compared to what we see today...

Landing gear blocks in the wing with wire gear... Don't see much of that any more...versus the cut and shaped aluminum flat bar screwed to the bottom of the fuse..
Old 04-24-2023, 03:42 PM
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gotta ask, what the heck are those valves out of?
Old 04-25-2023, 01:27 AM
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Rick,
Those valves are made for Caterpillar, not sure what they went to, something big for sure.
I just use them as weights to hold things down to the table.

Control surfaces are made in 2 sizes, one for rc and one for control line........rc is cut in half
Old 04-29-2023, 02:37 PM
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Here is the basic construction completed with other wing in place. From here on out will be sanding, covering, and radio installation. I will join the wings next and glass the center section. As you can see my shop is very basic with no fancy tools. This should show anyone can build an old kit easily. Iíll update the thread as I progress.


Old 04-30-2023, 03:22 AM
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Looking GOOD...
Now the real fun begins....
I am always trying to come up with some kind of snazzy color scheme on my planes. Sometimes all I do is create a lot of work and a mess of colors on an airplane..
But hey, I can guarantee there is never another one that looks like mine...

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