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Old Jan 08, 2010, 07:46 PM
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Question

House of Balsa 1/12 scale BF-109 to electric conversion.....help


Just bought a 1/12 BF 109 from House of Balsa that says it is designed for a .049.

Anyone have ideas on what motor setup in electric would be good to use for this?
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Old Jan 09, 2010, 11:15 AM
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Xanadu, I read a conversion chart somewhere that said an .049 was the equivalent of ~100W electric. Basically, any cheap bell outrunner that will deliver 10A continuous on 3S will do fine. Personally I like UH's A22-20L for my 1/12 warbirds. Depending on the prop it will give you 150-175W and it's about bullet proof.

HTH,
Jeff
Old Jan 09, 2010, 10:26 PM
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A Babe Bee/Golden Bee was about 50 watts, the Black Widow slightly more due to porting. The TeeDee .049/.051 converts to about 80 watts. (from Cox site)
If you have 100 watts and at least 80% efficiency from the motor you should be OK.
The HOB kits fly great with 150 watts, and about 8" props.

Mark
Old Feb 22, 2010, 06:06 PM
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did you ever decide on a motor for this one? I am 1/2 finished with my build on this and I'm thinking about a 2208 tower pro motor, but some extra zip wouldn't be bad.
Old Feb 22, 2010, 08:27 PM
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No not yet, but I got a PM that a Scorpion 2205-36 motor, APC 6-4E prop, 15 amp controller and a 3 cell 1000 MA LIPO battery pack, was a tried and tested outfit for it.
Old Feb 22, 2010, 09:49 PM
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I Might give a BP 2217 motor a try. That really has a ton of pull though. A 2212-10 should be plenty. I'm nearing the wing covering stage. I'll probably use Doculum and then pain the whole thing after I treat the wood.
Old Feb 22, 2010, 10:47 PM
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Got the fuselage done, now onto the wing.
Then when both done, will do final finishing, etc.

Have not decided how I am going to finish the covering yet.


Did the machine gun slots with a 3/8" dowel that I glued a piece of sandpaper around, then put it in my cordless drill...............whrrrrrrrrrrrrrrrrrrr.
Instant round slots!
Last edited by Xanadu; Feb 22, 2010 at 10:51 PM. Reason: typo's
Old Feb 22, 2010, 10:52 PM
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The wing goes together pretty fast, got one side 90% done in under 1-1/2 hours.
Old Feb 23, 2010, 07:33 AM
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Nice idea for the gun tunnels, Xanadu. Build looks lovely. Jeff
Old Feb 23, 2010, 08:29 AM
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Wow very nice looking plane there so far Xanadu. Are the details like the exhausts and intake in the kit to begin with or did you just fabricate them?

Another question to any accomplished builder since all I've ever built are stick and tissue guillows. Do most builders cover the sheeted fuse with monokote or do you just sand and fill the balsa to get a smooth surface for painting?

THanks
Alan
Old Feb 23, 2010, 09:53 AM
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Looks great! You're much further along than I am. I like the machine gun slot technique. I was beginning to wonder how I'd do those!

Alan
The wing on this plane needs covering, but the fuse, as you can see is part plank balsa and part plastic. I will likely cover my wing in doculum (paintable covering) and then treat the balsa parts with sanding lacquer and then paint. I don't know how it'll turn out, but it should be an interesting process.

Dan
Old Feb 23, 2010, 08:44 PM
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Quote:
Originally Posted by GiusedtoBe View Post
Wow very nice looking plane there so far Xanadu. Are the details like the exhausts and intake in the kit to begin with or did you just fabricate them?

Another question to any accomplished builder since all I've ever built are stick and tissue guillows. Do most builders cover the sheeted fuse with monokote or do you just sand and fill the balsa to get a smooth surface for painting?

THanks
Alan

The exhausts are pieces in the kit you assemble then glue them on, and the intake is just a block of balsa you shape and sand.
Same as the nose blocks, just hunks of wood, carve, shape, and sand.

Most tend to cover the balsa with monokote or similar. Just painting the balsa, looks exactly like that...........painted balsa. You see the grain, etc.
Old Mar 02, 2010, 12:04 PM
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I'm going to try to paint mine after using Deft sanding lacquer. That should fill the grain pretty well. I though about modifying the wing so I would have a solid wood structure, but I'll probably end up using doculum on it.
What motor do you think you'll be using? I plan on either a BP 2212-10 or a cdrom type like the 2409-12t.

Dan
Old Mar 04, 2010, 10:39 PM
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Hey Xanadu - nice job on the fuselage. How difficult was it to hold the dowling/drill steady when doing those gun ports? They look pretty sharp! I may try something similar to that in the next few weeks.
Old Mar 04, 2010, 11:23 PM
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Not hard. I drew my reference lines, cut a v-notch as a guide, and laid the dowel in taking my time.


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