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Feb 16, 2008, 11:42 PM
"Each Day Is A Lesson"
diver don's Avatar
Build Log

PIPER PAWNEE 80" from H-9 CONVERSION THREAD


Well this guy is about 2 weeks away, I hope, so I thought I'd start this to get some ideas.

http://www.horizonhobby.com/Products...ProdID=HAN4030

I'm not really sure this should be considered a "Glow to Electric" because H-9 seems to have made all the provisions for electric flight but I'm going to do a few mods.

First and foremost, this guy will have an operating dusting system, and this is were I may need some advice.

If you folks don't think this is an appropriate subject for THIS forum, let me know.

Don
Last edited by diver don; Feb 17, 2008 at 12:41 PM.
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Feb 17, 2008, 03:19 PM
Nothing like a good WOODIE!
cooper998's Avatar
Signing on!
Mine has been on order at the LHS for a couple of weeks now and hope to see it soon. I am planning on a Scorpion 4025-16 on 8s lipo's or 10s A123's. Big motor for some aerotowing.

cooper998
Feb 17, 2008, 07:28 PM
"NAVY CHIEFS"
rc_man1's Avatar
Don,
Can't wait to see how you are going to do the spray system. A long time ago I seen a guy use a fueltank and a perry pump to spray the water thru copper tubing. But that was a 1/4 scale. Good luck and I'll be watching. I'm very intrested in this project.

Best of luck
Mike
Feb 17, 2008, 08:25 PM
"Each Day Is A Lesson"
diver don's Avatar
Can't do a whole lot until she gets here but I have a few ideas.

Spray would be hard to see and liquid is heavy so I'm going to try to simulate dusting.

Right now I'm thinking along the lines of a servo operated hopper with a rear that could be lowered to allow release and then retracted to stop the flow.

With the prop wash I don't think I'll need a pump to dispense flour and it's cheap and visible.

Don
Feb 19, 2008, 12:11 PM
Registered User
I've got one on order too. I'm interested in adding an Aerosound system, with the low voltage amp, a sound module programmed with the Lycoming sounds, and a single 4" speaker. I believe that such a system (which can be fed by the motor battery pack) would weigh around 7 or 8 ounces. Any ideas on the optimum powertrain with this additional weight?
Feb 19, 2008, 12:57 PM
"Each Day Is A Lesson"
diver don's Avatar
I would look at an Axi 4130/16 on 6 cell LiPo or 7 cell A-123.

I'm testing an MAS 14x9x3 right now and it looks like a good fit.

I'm going to be useing a Turnigy C5065-400 (Hobby City) on 6 cell A-123 2 pack.

33Amps
17.0 Volts
600 watts
6200 RPM
112 oz thrust (Measured).

If this doesn't look ok I'm going to the 4130.

BTW: I called this morning because Horizon changed delivery from "Late Feb" to "Coming Soon" and they said it will ship next week.
We shall see.

Don
Last edited by diver don; Feb 19, 2008 at 01:06 PM.
Feb 20, 2008, 11:55 AM
Nothing like a good WOODIE!
cooper998's Avatar
Don,
I hope your right on the ship date, my LHS says it will be mid March. Horizon web site just changed their availability to early March. I may just have to pack this one away till next Winter if its any later than that.
You may also want to reconsider the flour for dusting, it absorbs water quickly. I vaguely remember reading somewhere that a Top Gun competitor used ashes as a dusting medium since every other powder he tried would clog the nozzles, it was written up years ago in Model Airplane News. An e-mail to Frank Tiano may get you a name or contact.

cooper998
Feb 20, 2008, 12:06 PM
3d and EDF, some scale
MustangAce17's Avatar
cooper, I think the plane your thinking of was a Rockwell Thrush,I'll have to look but i might still have the magazine the article was in. Not sure if I'll be getting a Pawnee 40 now either,haven't flown the Pawnee 15 for awhile.
Feb 20, 2008, 01:07 PM
"Each Day Is A Lesson"
diver don's Avatar
well, I called Horizon just now and they said it should ship the end of next week Soooooo I would say it's a definate MAYBE.

As for the flour, I'm not going to dispense it thru tubes and nozzles but from a hopper.
This will be a DUSTER not a SPRAYER. I hope.

I may just run the flour past the hot motor and drop cup cakes.
Don
Last edited by diver don; Feb 20, 2008 at 01:23 PM.
Feb 20, 2008, 01:29 PM
3d and EDF, some scale
MustangAce17's Avatar
Easy Bake Pawnee
Feb 20, 2008, 04:35 PM
3DHS Junkie
800mZero's Avatar
I thought the outboard profile was pretty dang scale!
http://www.airliners.net/photo/Untit...nee/1277170/M/

the photo you have is a pawnee brave

Just try to keep it from looking like this
http://www.airliners.net/photo/Aquil...nee/1225314/M/
Feb 20, 2008, 07:14 PM
"Each Day Is A Lesson"
diver don's Avatar
Quote:
Originally Posted by 800mZero
I thought the outboard profile was pretty dang scale!
http://www.airliners.net/photo/Untit...nee/1277170/M/

the photo you have is a pawnee brave

Just try to keep it from looking like this
http://www.airliners.net/photo/Aquil...nee/1225314/M/
Thanks for the pix's.

I wasn't aware of the diff , and yes, it seems to be a close copy.

Many thanks,

Don
Feb 20, 2008, 09:42 PM
3DHS Junkie
800mZero's Avatar
no prob ---I'm thinking about doing this as well and towing some of my club guys sail planes for em----we'll see how that goes I have always been a fan of the plane.
Feb 21, 2008, 07:15 AM
Nothing like a good WOODIE!
cooper998's Avatar
Quote:
Originally Posted by diver don
I may just run the flour past the hot motor and drop cup cakes.
Don
Now were talking!
Fresh baked cupcakes, way better than any candy drop!

cooper998
Feb 24, 2008, 09:56 AM
Registered User
Is the weight claimed by H9 at 8-9 lbs correct? I have to wonder if a 46 will fly this plane
Jim


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