Goldberg Pitts Model 12?? - RC Groups
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Mar 08, 2005, 01:36 PM
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Tram's Avatar

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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Mar 08, 2005, 07:14 PM
Fly it like you stole it..
Tram's Avatar
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..
Mar 08, 2005, 08:00 PM
Jeff Carr
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

Mar 08, 2005, 09:02 PM
Fly it like you stole it..
Tram's Avatar
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..
Mar 09, 2005, 02:25 PM
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Tram's Avatar
No one wants to tackle this eh?
Mar 09, 2005, 07:28 PM
Registered User
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.

Mar 09, 2005, 07:36 PM
Fly it like you stole it..
Tram's Avatar
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)
Mar 09, 2005, 07:48 PM
Registered User
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


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