Nice! Glad the build is going well.
I'm working on the interwing struts and gluing engine pieces together
80" PT-17: Flite Fest 2023 Community Challenge – Barnstormers!
- Thread starter wilmracer
- Start date
Nice! Glad the build is going well.
I'm working on the interwing struts and gluing engine pieces together
Also kicking off the dreaded prime-sand-fill-sand-repeat process. I love 3D printing but I'm very jealous of resin printers!
On edit: The power system just arrived. Planning for 8s but can go to 10 if needed. We'll see. Prop is on order too.
On edit: The power system just arrived. Planning for 8s but can go to 10 if needed. We'll see. Prop is on order too.
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FlyerInStyle
Elite member
why that much power? I am running my p26 off of a 4s power system, and it is about the same size
Maybe I'm mistaken about the size of your Peashooter. Isn't it 67"? What is your AUW?
This Stearman build 80" span on the top wing. The last Stearman build I did at 70" span weighed somewhere around 14lbs. With the extras on this one I'm figuring closer to 20lbs AUW. The cube loading will be fine so I'm not at all woried about it at that weight but for the sake of safety and fun I like 120+ watts/lb on my models. I know the P26 has a lot of drag but this model will have a LOT of parasitic drag. With 2 wings I'd also expect twice the induced drag too, but that may not scale linearly (IDK).
I'm planning to run an 18" x 10" prop, or something in that ballpark. I actually pulled the trigger on a very scale (ground) variable pitch propeller that will be painted to look like the one on Lucille but I will do the maiden and shakedown flights with a xoar. Once I'm confident she's trimmed out and reliable I'll test out the fancy prop.
Flying Farm Kid
Active member
Resin printers are great. they cost a lot for the build volume but they are worth it.
My school had a couple that I used last year the quality is insane
FlyerInStyle
Elite member
I guess that makes sense, I upped it to a 77" wingspan, and I am currently running a 11x7.75 prop.
Getting down to crunch time here. Struts are glued together with JB Weld and are curing, paint is going on the cylinders, and all the parts are here. I'm also printing a second version of the bellhousing that allows for more clearance just in case.
I need to push HARD to get this done in the next week or two so she can be flight tested and tuned locally. I may need to put off some detailing until after FF but we'll see.
I need to push HARD to get this done in the next week or two so she can be flight tested and tuned locally. I may need to put off some detailing until after FF but we'll see.
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Good stuff, Carl! 😎
luvmy40
Elite member
None of that will be visible from 10 feet away, much less in flight. That does not make it any less awsome!
True! After I make a few tweaks and release the files I want to built a 1:3 static model to display in my office. Started gluing the exhaust together.
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Building at a feverish pace now. It might not look like much but today a lot got done. Pushrods are in, installed with giant-scale hardware. They are ROCK SOLID. Electrical work is mostly done. I have my doubts that the signal/reception issues will be better at FF this year and since that is how I lost the last Stearman I've opted for redundant receivers in this one. Wiring harness includes a 20 Amp programmable BEC from Castle, the Gecko 120Amp ESC, a R-X8R pro receiver with a X8R receiver as a backup, and power for the Aspire sound system from Mr. RC Sound (2 transducers). I need to settle on a location for the transducers. I'm leaning toward the lower surface of the lower wing, one on each side. Would give a lot of surface to resonate and hopefully make the most of the setup, but IDK. Open to input (paging @willsonman). Still a lot to do but I'm happy with today's progress
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No pictures to share today but I'm going to keep up my daily posting routine. Last night I started on the electronics installation. I soldered up some extensions for the Mr RC Sound transducers so I could space them out in the lower wing. I got the backup receiver installed in the tail section in a 3D printed brace that holds the antenna in the proper orientation and got the rudder and elevator servos connected and programed.
I uploaded a short to YouTube CLICK HERE FOR NOISE!
Tonight I'll make the extensions for the aileron servos and get them installed and then hopefully have time to work on the wing-side mounting brackets for the struts. Those mounts, along with the cabanes, are really the only challenging part of the build remaining. I'm also hoping to have time to close up the remaining fuselage pieces, but for now it is nice having easy access to everything.
I uploaded a short to YouTube CLICK HERE FOR NOISE!
Tonight I'll make the extensions for the aileron servos and get them installed and then hopefully have time to work on the wing-side mounting brackets for the struts. Those mounts, along with the cabanes, are really the only challenging part of the build remaining. I'm also hoping to have time to close up the remaining fuselage pieces, but for now it is nice having easy access to everything.
Taildragger
Legendary member
@wilmracer I didn't even see this thread but I was scrolling through YT and found that short. Immediately came here to find out more. How do you get your hands on a sound system like that!? Super cool and I think I need it for some upcoming builds.
FIND IT HERE
I like this setup, and it has a LOT of features I'm not even using. It has several engines by default (including the wasp jr.) and has several sounds for each that can be controlled from open channels. It even has machine gun noises and the ability to sync LEDs with the machine guns. It comes with one transducer, can handle 2, and for BIG stuff it can connect to an amp and 2 more transducers. I have the setup to run 4 in the B17 one day.
FlyerInStyle
Elite member
Looks and sounds like I should install that in my p26, but as always, too expensive
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