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Sep 22, 2002, 12:22 PM
Trader Rating: 8
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WTB: Power plant for "Jerry"


No one bought my Jerry kit, so I want a suitable drive train for it.
I'm thinking a geared Hacker setup, but am open to any other suggestions, especially if someone has some info on those new rotating can direct drive motors like the AXI's.
Also, if not personal property being offered, any sources for the best prices on what you suggest would be appreciated.
Thanks!
Bob Cowgill
Cocoa, Florida
E-mail:rcowgill@cfl.rr.com
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Sep 22, 2002, 03:21 PM
Trader Rating: 37
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amapmfg's Avatar

Jerry


Jerry flys best at 50amps with 14.4x9.5 prop wont stand low power my best set up was late ver FAI 15 astro 4.4:1 planet on 12 zapped 4/5 2400 same size and weight as cp1700 .tip stalls big time George
Sep 22, 2002, 03:58 PM
Trader Rating: 8
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Jerry power plant


I've been wringing out Motocalc, and without going into the B50 series Hackers, the best thing I could come up with was a B40-9L with 4.4:1 gearbox, swinging a 14 X 8 or 14 X 9.5 prop on 10 zapped CP1700's. Current, run time, wing loading and climb rate all look pretty good.
The 10 RC2400's looked good on paper, but I'm not sure if I could squeeze 'em in the plane.
Just for grins, I used my digital scale and weighed all of the Jerry components. They came out just under 28 oz.
Curiously enough, there is over 1/4 oz. difference in the weight of the two wing panels!
I'll be using a carbon wing joiner, so that saves a couple of ounces over the steel one that comes with the kit.
So, unless someone has a better idea, I'll probably go after the B40-9L setup.
I understand that your setup may be a bit heavier than the one I am planning, and I wonder if that is part of the cause of the tip stalls?
Doesn't make any sense to ME, but then I'm no aeronautical engynear/enemageer/imbeceer/....Whatever! :-)
Bob Cowgill
Cocoa, Florida
E-mail:rcowgill@cfl.rr.com
Sep 23, 2002, 05:06 AM
Trader Rating: 8
Registered User

No AXI for the Jerry!


A fellow just sent me the data on the AXI motors that are available. It looks like they are all too small.
So, I'm back to seeking the Hacker B40-9L with the 4.4:1 gearbox
unless I decide to go with the slight overkill Aveox setup I've been offered.
Whatcha got out there???
Bob Cowgill
Cocoa, Florida
E-mail: rcowgill@cfl.rr.com
Sep 23, 2002, 11:35 AM
Trader Rating: 0
Registered User

Power plant for jerry


A couple of things about the jerry I have learned.

10 rc2400 cells fit in fuse fine without any problems (two sticks of 5 cells side by side). some guys have put 16 cells in this thing.

I have found as have others on this site (do a search in electric flight sailplanes) that it flies fine if its heavy. mine is around 76 oz. (10 rc2400 + hacker b50-7S F5F) and with this setup is the fastest climbing plane at my field by a wide margin.
Sep 23, 2002, 11:59 AM
Trader Rating: 4
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Steven Horney's Avatar
You shouldn't have any problem fitting fairly high cell counts into the Jerry. I've always flown mine on either 14 or 16 2400 cells (2 packs of 7 or 8 cells, respectively). My plane was powered by either a Jeti 30-3, 11x6 prop, and 14 cells, or a Jeti 45/3, 16 cells, and 13x7 prop. Current draw was 55 amps with the 30-3, 50 amps with the 45/3. Climb is near vertical to vertical (depending on which setup), with plenty of speed. Use a fair amount of aileron differential for improved turning. It will tip stall, but it's not usually much of a problem unless you get it real low and slow. This plane generally likes to be flown fairly fast. Mine weighs 89 oz with 16 cells and the 45/3.

Steve
Sep 27, 2002, 01:18 PM
Trader Rating: 127
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gavoss's Avatar

Brushless motor for Jerry


Bob, I have a Phasor 45/3 and Jeti 70P3 for $200. email me direct if interested.

gavoss@swbell.net
Sep 27, 2002, 01:36 PM
Trader Rating: 228
Balsa Snob - Mostly

And I have the Jerry motor/ESC as well


I have a NIB Phasor 45/3 and a used Jeti 70P listed in Sale/Wanted for ... let's see now... $125 + $80 shipped.



Atindra.
Sep 27, 2002, 01:50 PM
Trader Rating: 127
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gavoss's Avatar

Jerry


Atindra, how much are you selling your motor/SC combo for?
Sep 27, 2002, 01:53 PM
Trader Rating: 228
Balsa Snob - Mostly
Hi George,

Right now they are listed seperately.. NIB 45/3 $125 shipped

Jeti 70-3P White label $80 shipped.

Regards,

Atindra.


Sorry to do this on your thread bmwbob !
Sep 27, 2002, 01:54 PM
Trader Rating: 8
Registered User

45/3


Guys,
Thanks for the offers on the Phasor motors!
I'm going for the geared, lower cell count type setup.
BTW, wen I was selling a bunch of stuff for my buddy a couple of months ago, I sold a NIB 45/3 for $90 shipped! :-(
Bob
Sep 27, 2002, 01:56 PM
Trader Rating: 127
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gavoss's Avatar

Agreement!


Well, it looks like we agree on what they are worth. ;-)
Sep 27, 2002, 02:01 PM
Trader Rating: 228
Balsa Snob - Mostly
Uh-uh, price revision pending !