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Old Mar 08, 2005, 12:36 PM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,298 Posts
Goldberg Pitts Model 12??

Ok guys -

Just a thought here.. the thought was provoked due to some reading in the newest FLY R/C I was doing..

They document a conversion of the Hobby Lobby Gee Bee to electric power.

They swap out a OS 1.20 for an AXI 4130/20..

My Goldberg Pitts is going to be flying on a Saito 1.20, which I hear is plenty for the type of flying I am planning on for this bird - Scale flight, no hovering, etc..

So what I'm wondering is - would it be possible to just slip the 4130/20 into the Pitts and expect the same performance out of the AXI as I could the 1.20?
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Old Mar 08, 2005, 06:14 PM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,298 Posts
Ok - here's an update - but I would still like to have input from all interested parties..

Got the Pitts weighed up..

~130oz out of the box - including everything - tank, axles, etc..

Soo.. What AXI? Looks like the 4130 is out of the question.. May need something like the 5320 or 5330..
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Old Mar 08, 2005, 07:00 PM
Jeff Carr
Ft. Mill SC / Charlotte NC
Joined Mar 2001
2,655 Posts
I just installed a 4130/20 in my Storch 7s4p and a 17x10 prop. Its gonna push the amps up but Ill see what the results will be. This Storch has a 94 inch wing. I think the 5000 seris will be better for you.

If you really want good performance get an Actro. Big bucks but it will do the job

Jeff
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Old Mar 08, 2005, 08:02 PM
Fly it like you stole it..
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Florence, Al
Joined Oct 2000
29,298 Posts
I will look at the Actro..

I am not looking for hover power, although it would be nice, I just want a nice scale flying bird..

I think the 5000 series will be better also..
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Old Mar 09, 2005, 01:25 PM
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Florence, Al
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No one wants to tackle this eh?
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Old Mar 09, 2005, 06:28 PM
Registered User
Oak Harbor, Washington, United States
Joined Jan 2001
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What size is the Goldberg? I'm using an Actro 40-5 on my Cermark Pitts, 60" wingspan. Using the new TP ProLite 4000 10s2p pack, it weighs just under 12 lbs., and has unlimited vertical.

Norm
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Old Mar 09, 2005, 06:36 PM
Fly it like you stole it..
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Florence, Al
Joined Oct 2000
29,298 Posts
Top Wingspan: 60" (1525mm)
Bottom Wingspan: 58" (1475mm)
Top Wing Area: 555 sq in (36 sq dm)
Bottom Wing Area: 534 sq in (34.4 sq dm)
Weight: 11.25 - 12.25lb (5.1-5.5kg)
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Old Mar 09, 2005, 06:48 PM
Registered User
Oak Harbor, Washington, United States
Joined Jan 2001
1,183 Posts
Well then it looks like they are nearly identical in size, but weight might be different RTF. Anyway, looks like my set-up would certainly work in the Goldberg.

So that you might compare the Actro to the AXI, here is some data:
Actro 40-5/Actronic 70-32 controller
APC-E 19x10 prop
10s2p ProLite TP pack
64 amps WOT
2236 Watts in
227 oz. thrust
Plane weight 191 oz.
Wing area 1058

Norm
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