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Old Aug 10, 2003, 04:02 PM
Registered User
Tel-Aviv ISRAEL
Joined Jul 2003
17 Posts
Potensky Cobra 3D

Hey all!
I was wondering about the Potensky Cobra 3D model, can it really hover with the stock set up? at 3/4 throttle?!? i planing on using:
2* 18 grams each GWS mini servos
2* 7 grams each PICO servos
SUN 1000 18A ESC (22 grams with cables)
***if ESC is incuded with the kit im using the one that is included***
7 or 8 cells twicell 720 mAh NiMh (93 grams or 105 grams)
Hitec 555 reciever (21 grams)
stock 300 motor + stock 5:1 gear box
stock PROP
would it have enough power per weight to hover at 3/4 throttle and perform 3D meneuvers?
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Old Aug 10, 2003, 05:51 PM
The original Flying Pigs Sqd.
Up&Away's Avatar
Netanya, Israel
Joined Aug 2002
10,066 Posts
I'm not sure. What is the stock prop?

Do a search and you may find all you need. Here's one to start you off with:
http://www.rcgroups.com/forums/showt...D&pagenumber=1

Who's selling the Cobra here in Israel (or any other of the Czech planes)?
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Old Aug 10, 2003, 06:06 PM
Registered User
Tel-Aviv ISRAEL
Joined Jul 2003
17 Posts
no one, i have a grand mother in the US.... stock prop is 10*4.7

i did a search, didnt finf anything...
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Old Aug 12, 2003, 06:18 PM
Registered User
Tel-Aviv ISRAEL
Joined Jul 2003
17 Posts
no one?
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Old Aug 12, 2003, 07:17 PM
Registered User
Pasadena, CA
Joined Jun 2003
3,182 Posts
Hi Aviv.

I think you will have to use 8 cells, to be happy.

I was running the stock setup with 2 cell etec 1200 lipos, so about 7.4 volts.

Even with the lower weight of the batts, I was not too happy with the way it flew. Yes, it would hover, barely. But it was too slow.

I quickly switched to an astro 010 brushless, with their 3.3 gear box, and 3 cell etec lipos, and that is wonderful!

I think the extra cell, (8), will be much better than 7.

Don
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