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        Build Log PIPER PAWNEE 80" from H-9 CONVERSION THREAD

#1 diver don Feb 16, 2008 11:42 PM

PIPER PAWNEE 80" from H-9 CONVERSION THREAD
 
3 Attachment(s)
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

#2 cooper998 Feb 17, 2008 03:19 PM

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

#3 rc_man1 Feb 17, 2008 07:28 PM

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

#4 diver don Feb 17, 2008 08:25 PM

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

#5 weston_e_flyer Feb 19, 2008 12:11 PM

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?

#6 diver don Feb 19, 2008 12:57 PM

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

#7 cooper998 Feb 20, 2008 11:55 AM

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

#8 MustangAce17 Feb 20, 2008 12:06 PM

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.

#9 diver don Feb 20, 2008 01:07 PM

:rolleyes: 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. :rolleyes:

I may just run the flour past the hot motor and drop cup cakes. :)
Don

#10 MustangAce17 Feb 20, 2008 01:29 PM

Easy Bake Pawnee:)

#11 800mZero Feb 20, 2008 04:35 PM

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/

#12 diver don Feb 20, 2008 07:14 PM

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

#13 800mZero Feb 20, 2008 09:42 PM

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.

#14 cooper998 Feb 21, 2008 07:15 AM

Quote:

Originally Posted by diver don
I may just run the flour past the hot motor and drop cup cakes. :)
Don

Now were talking! :D
Fresh baked cupcakes, way better than any candy drop!

cooper998

#15 iflyelectric Feb 24, 2008 09:56 AM

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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