Stearman build

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4 years 6 months ago #22593 by Brian
Replied by Brian on topic Stearman build
I thought perhaps Pop Bang Chuggga-Chugga would be more realistic Kevin. The photo shows the 3d printed engine wrapped around a brushless motor (UGH!).I wondered if you could use the front part of the 3D "engine", just to hide the noisy, hot oily lovely lump that drives the prop.

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4 years 6 months ago #22594 by kevinross
Replied by kevinross on topic Stearman build
Sorry Brian, i totally misunderstood your post. If your saying you could 3D print dummy cylinders i would be very interested. Here's a pic of a scale build from the RCSB builders forum. The model is virtually the same size as mine but this "kit" version is well oversize.
Most PT-17's were made with 9 cylinder Continental, some with a 7cylinder Jacobs (which most models copy for simplicity.

I'm fitting a 3 cylinders Saito so its unrealistic to blend scale dummy cylinders to the original formats, So will have to cheat a bit and go for 6. My plan therefore get 3 x 3-D printed copies of the Saito and mount in between each cylinder. That will fill an empty space and with some careful plan to the rear of the dummy cylinders i hope to improve air flow & cooling

So if thats something you could help me with i would be very interested but i am a few months away at the moment.
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4 years 6 months ago #22595 by Brian
Replied by Brian on topic Stearman build
The 3D printed engine I have is the Continental R-670 as used in the Boeing Stearman PT-17. Just for fun, I've printed the bell housing to see what it looks like, to be honest I'm impressed by the detail. There's a ring of hex headed bolts, the only thing missing is the lockwire on the bolt heads. Spooky!
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4 years 6 months ago #22599 by Phil Ford
Replied by Phil Ford on topic Stearman build

Brian wrote: I've printed the bell housing to see what it looks like, to be honest I'm impressed by the detail. There's a ring of hex headed bolts, the only thing missing is the lockwire on the bolt heads. Spooky!

That's awful, :ohmy: no locking wire. They will come loose guaranteed. :lol:

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4 years 6 months ago - 4 years 6 months ago #22600 by kevinross
Replied by kevinross on topic Stearman build

Phil Ford wrote:

Brian wrote: I've printed the bell housing to see what it looks like, to be honest I'm impressed by the detail. There's a ring of hex headed bolts, the only thing missing is the lockwire on the bolt heads. Spooky!

That's awful, :ohmy: no locking wire. They will come loose guaranteed. :lol:


I agree this is the standard we expect.
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4 years 6 months ago #22601 by Brian
Replied by Brian on topic Stearman build
Yeah, but that's a real one ennit.

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