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by rsv1cox Sun Jul 21, 2024 6:58 pm

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Post  rsv1cox Sat Jul 06, 2024 9:53 pm

If you read the markings on the horizontal stab you begin to wonder. Smile

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Post  Admin Sun Jul 07, 2024 12:42 am

Must've been built by someone named Sturdi, not sure what else it could refer to tongue.

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Post  Ken Cook Sun Jul 07, 2024 5:26 am

James Smurthwaite was a good friend of Jim Walker. He was also in charge of production and design in the American Junior Company. J. When Jim Walker passed away, James renamed the company J, Roberts. His full name was James Robert Smurthwaite. Later on James sold the company to a fellow in Idaho who changed the name to Sturdi Built and was still producing the kits that James designed. This presented some legal problems and the company was changed once again to Jim's Flying Models.
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Post  KariFS Sun Jul 07, 2024 6:38 am

Admin wrote:Must've been built by someone named Sturdi, not sure what else it could refer to tongue.

Yea, looks like Sturdi could use some practise to build more durable airplanes.

That damage kinda looks deliberate to me, perhaps frustration of a child, or someone just crumpled it into trashbin, later to be rescued by someone else. Looks like it has a nice Golden Bee installed.
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Post  roddie Sun Jul 07, 2024 7:56 am

My Walker 3-line handle and the literature that came with it have the "Sturdi-Built" reference.

Sturdi Built? Sturdi10

Sturdi Built? Sturdi12

Sturdi Built? Sturdi11
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Post  rsv1cox Sun Jul 07, 2024 8:46 am

There has been an orange JW handle on ebay for some time now for not crazy money but I have a couple in black (that are not so nice) so I pass.

I did however bid on that broken up Sturdi Built pictured mostly because of the rather nice Golden Bee. The plane does have a fatal flaw, the back of the plastic fuselage is broken off. Tough to repair that one but I like a challange. However I won't be disappointed if I'm over-bid.
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Post  944_Jim Sun Jul 07, 2024 9:32 am

Roddie,

Do the foam Fire-xxx models share the same wingspan? Is reasonable to expect they share the same wing?

And this one is for RSV Bob, any chance you have one of these either in platform or physical?

I suspect a generic Hershey bar wing with rounded tips. This look fairly easy to replicate. Of course, I'm just rubbing my chin. Huh...

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Post  rsv1cox Sun Jul 07, 2024 9:56 am

I keep an eye out for the Bird, Brand and Bee but I have none of those.

But I do have a start on the Bonanza.

Sturdi Built? P1017852
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Post  roddie Sun Jul 07, 2024 10:27 am

944_Jim wrote:Roddie,

Do the foam Fire-xxx models share the same wingspan? Is reasonable to expect they share the same wing?


I have to assume that all the Fire-xxx (1/2A) airplanes use that same 24" span Aerofoam wing Jim.. I mean; there's only one replacement part listed.. and it just wouldn't make sense to make three differing foam-wing profiles for three 1/2A designs. Too bad that the wings' chord/area is not listed. They're probably fully symmetrical though.

Sturdi Built? J_robe17

Sturdi Built? J_robe18
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Post  rdw777 Sun Jul 07, 2024 11:11 am

I hope you win that one Bob…. Within your repairs scope easily….The condition of the plane may “shade” the winning price to get an excellent deal on the very nice Golden Bee…

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Post  rsv1cox Sun Jul 07, 2024 12:15 pm

rdw777 wrote:I hope you win that one Bob…. Within your repairs scope easily….The condition of the plane may “shade” the winning price to get an excellent deal on the very nice Golden Bee…


Yes, Nice "early" Golden Bee like the pair I first mounted on my scratch built P-38 before I graduated to Black Widows.  I think that it's swinging a white Kasun prop.  

Sturdi Built? S-l16042
Sturdi Built? S-l16043

My P-38.  Never far away.  Fondest memories building it at the dining room table in Patuxent River Maryland some 57 years ago with a Mireille Mathieu album spinning on the stereo.  

Sturdi Built? P1017853
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Post  roddie Sun Jul 07, 2024 2:38 pm

That engine is (for me) the most synonymous with Cox. My longest-owned model engines are a pair of Golden Bee's just like that one. Smile

My first "multi-engine" design used that pair. It was originally a single-engine design.. but WAY under-powered and was actually a "triplane" (edit: tri-engine..rather   Embarassed ) at one point. It wasn't under-powered with 2.4cc's pulling it through the air..

Single-engine-early (first set-up single Golden Bee)

Sturdi Built? Skywal15

Below is current condition.. after having been flown to death. Its' nose had been bashed-off decades ago (more than once...)  but shows evidence of the twin wing-mounts. As a "tripe" (edit: tri-engine.. Rolling Eyes ) it had a Babe Bee (central) with Golden Bee's out on the wing left and right; but as close to the fuse as 6"d. props would permit.

Sturdi Built? Skywal16


Last edited by roddie on Thu Jul 11, 2024 7:00 am; edited 3 times in total (Reason for editing : tri-engine.. not tri-plane..)
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Post  rsv1cox Sun Jul 07, 2024 3:46 pm

I have to say roddie your building/design skills have evolved in a extraordinary positive direction since you built that model, the difference between that, the Rare Bear and your more recent projects - remarkable!!  Not that orange/yellow guy isn't beautiful. 🙂

I have gone in the other direction, the P-38 was my high point, since then everything down hill.  I can see you flying it.  Twin Golden Bees in sync zipping along.  Been there. Doesn't matter what it looks like.  I only regret that I did not build that B-24 I had planned.
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Post  rsv1cox Tue Jul 09, 2024 10:05 am

I won that broken up Firebaby with the Cox Golden Bee engine at my low bid.  The GB is a bonus, what I'm looking forward to is rebuilding that JW Firebaby.

Sturdi Built? Broken17


Matching the color on the elevator to the rest of the plane might be a problem.
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Post  rdw777 Tue Jul 09, 2024 4:49 pm

Congratulations on winning the Sturdi Built Firebaby Bob….. Looks like the missing piece of the wing is still in the fuse….. If all the pieces are there will be a good chance on putting it back together…. Will be curious as to your approach and what glue you use….. The Golden Bee is a very nice example…. Looks like its anodizing has survived well… Will be waiting for your assessment Thumbs Up
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Post  rsv1cox Tue Jul 09, 2024 6:54 pm

rdw777 wrote:Congratulations on winning the Sturdi Built Firebaby Bob….. Looks like the missing piece of the wing is still in the fuse….. If all the pieces are there will be a good chance on putting it back together…. Will be curious as to your approach and what glue you use….. The Golden Bee is a very nice example…. Looks like its anodizing has survived well… Will be waiting for your assessment Thumbs Up

I'm thinking very lighty brushed on each mating piece 5 or 30 minute epoxy so when joined there is little or no squeezed out epoxy.  I don't think wood glue would do the job as well bonding the pieces.  I have lost my faith in CA as it seems to crystalize as it wicks.  Also with CA I think staining of the joined painted pieces would be a problem.  Is that paint or some sort of dye?  

Concur, or something better?

I always go back to my first Firebaby.  Anything is possible.

Sturdi Built? Fire_b35

Sturdi Built? P1017860
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Post  rdw777 Wed Jul 10, 2024 3:58 pm

I agree epoxy would be best fix on the really bad break….My Firebaby wing just had a couple of splits and I fixed it with Duco but was minor compared to the one you have coming up….. Epoxy may add a little needed structural strength as well….. I use a little CA here and there but not for general building or repairs….. Sometimes it just won’t take and also can make the wood brittle around the joint ….
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Post  rsv1cox Mon Jul 15, 2024 9:40 am

rdw777 wrote:I agree epoxy would be best fix on the really bad break….My Firebaby wing just had a couple of splits and I fixed it with Duco but was minor compared to the one you have coming up….. Epoxy may add a little needed structural strength as well….. I use a little CA here and there but not for general building or repairs….. Sometimes it just won’t take and also can make the wood brittle around the joint ….

I changed my mind, the balsa is too brittle to brush epoxy on without damage. It would just flake off. Instead I used CA to capture the balsa and hold it in place. Later I will fill in the trenches with epoxy applyied with a toothpick. Strength is important, most if not all of the balsa will be enclosed inside the plastic triangle but the breaks are right at the edges. I may have to cut a new wing and go the decal route.

But the question is - was it crashed or stepped on. The wing shows previous repaired crush damage. The Golden Bee shows no sign of ever being ran after leaving the factory. No fuel residue anywhere including on the reed which has corrision but still moves freely. But, there is fuel reside on the mount/firewall. Curious. The GB goes back together untouched.

Sturdi Built? P1017914
Sturdi Built? P1017913
Sturdi Built? P1017915
Sturdi Built? P1017916

The only way I can think of to repair the broken off fuselage tail section is to build a new section sandwiched between two pieces of balsa well saturated with sanding sealer and painted probably fixed with a couple of 2/56's. Yeah......tail weight but what's the alternative. You have to have support for the horz stab and elevator.

Sturdi Built? P1017918
Sturdi Built? P1017917





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Post  roddie Mon Jul 15, 2024 10:47 am

Maybe a pair of craft (popsicle) sticks fastened to the fuse with #2 machine-screws/nuts (or alum. pop-rivets??) to make the slot that you need?

A lousy drawing/example.. but you know what I mean.

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Post  rsv1cox Mon Jul 15, 2024 2:17 pm

That's just what I had in mind roddie, only using 2/56's but aluminum pop rivets would be lighter.

Sturdi Built? P1017920
Sturdi Built? P1017919

Notice the tail skid. I used my first Firebaby as a trace. It came to me pretty beat up without a tail wheel so I used a popsicle stick as a repair and I didn't notice it when I cut the replacement. My repair fooled me. I didn't notice it until I dug out an original for these pictures. I think the wheel would be more vunerable to breakage so I'm keeping the skid.

I used wood glue to glue the three pieces together. Some sanding sealer with a piece of 1/16" balsa inbetween to keep it from leaching and some red paint.

I was going to use epoxy, but what a mess. Catalyst thickened so I had to use a heat gun, spurted out in unknown equals but I got enough mixed to fill the voids in the wing.

Sturdi Built? P1017921
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Post  rdw777 Mon Jul 15, 2024 3:41 pm

That wing was a tuffy Bob but looks like you have taken best route to salvage….. Yes, epoxy can get to be mess quickly, Especially if it is quick set….. I haven’t been able to find any 30 min locally in a while….. Interesting to try and understand what may have happened to the wing with that kind of a break …. Maybe a little kid playing with it and just got too rough…. The Golden Bee is a nice example and very clean!!….
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Post  rsv1cox Tue Jul 16, 2024 6:30 pm

rdw777 wrote:That wing was a tuffy Bob but looks like you have taken best route to salvage….. Yes, epoxy can get to be mess quickly, Especially if it is quick set….. I haven’t been able to find any 30 min locally in a while….. Interesting to try and understand what may have happened to the wing with that kind of a break …. Maybe a little kid playing with it and just got too rough…. The Golden Bee is a nice example and very clean!!….

I used a jewelers file to smooth out the epoxy high spots and slid the wing in a very tight opening which it survived without breaking.  Its moving from Oregon to Idaho.


Sturdi Built? P1017922
Sturdi Built? P1017924
Sturdi Built? P1017925
Sturdi Built? P1017923
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Post  rdw777 Wed Jul 17, 2024 12:22 pm

Great job on the wing repair Bob, Like to see these old, neglected antiques be restored….. A little different challenge in each one…. Interesting Very Happy
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Post  rsv1cox Fri Jul 19, 2024 5:09 pm

rdw777 wrote:Great job on the wing repair Bob, Like to see these old, neglected antiques be restored….. A little different challenge in each one…. Interesting Very Happy

Thanks Robert, Its what I do - take nothing and try to make something out out it.  My house is littered with examples.  

This one, about finished.  I still have to cement in the tail assembly.  The fuselage had a decided bend to it.  Some applied heat gun and some weight eliminated most of it.  The as new Golden Bee is not going back on.  I picked out a couple of period correct thin wall tapered Babe Bees for it instead.  Upright or horizontal, haven't made up my mind.  Hopefully it will not be too tail heavy, I might have to find a beat Golden Bee for it.  

Sturdi Built? P1017934
Sturdi Built? P1017930

Straighter now.

Sturdi Built? P1017931
Sturdi Built? P1017932
Sturdi Built? P1017933
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Post  rsv1cox Sat Jul 20, 2024 9:19 am

Not-so Sturdi Built is finished. Bent perhaps but no longer broken. Not pretty but definately flyable. CG falls within range.

Sturdi Built? P1017935

Replacing all those little washers and nuts.......not fun. Top end snaps on, tabs and slots.

Sturdi Built? P1017937
Sturdi Built? P1017936

Family portrait. Flourescents not kind to photography.

Sturdi Built? P1017939
Sturdi Built? P1017938
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