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Old Sep 12, 2003, 04:25 PM
Registered User
Los Angeles Industry, California, United States
Joined May 2003
461 Posts
brushed power system for a 40sized profile

ive got like 5 6-cell packs of 1700nicads
how many cells would I need to power a 40sized profile with these nicads and a brushed power system?

what kind of prop, gearbox and ESC would I need aswell?
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Old Sep 12, 2003, 04:43 PM
Lookin' Good. Real Good.
larsy87's Avatar
London, Canada
Joined Aug 2002
3,979 Posts
A big one.

I think burshles is what you need when your're wa up there in power needness.
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Old Sep 13, 2003, 09:17 AM
310mph Kolibri T25 Swist
henke's Avatar
Sverige, Kronobergs Län, Ljungby
Joined Jan 2001
4,764 Posts
Hi

Are those 4/5 SC, or the full size Sub C cells?

you will only get 4min flights with good power from those 1700mAh cells

I would reccomend a Hacker B40 10L 4,4:1 14x7 on 12cells.

or split the cells and make 10cell packs, and run a B40 8L 4,4:1 13x6,5 or 14x7. I use that setup in my diablotin mini super.

it would pull a profile very well... use contest balsa, and buldt light, you will easily reach down to 3,5lb

/Henke
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Old Sep 13, 2003, 11:40 AM
Registered User
Los Angeles Industry, California, United States
Joined May 2003
461 Posts
hmm i think they are Sub C cells, the same kind of cells used for RC car racing packs, mine are all matched packs
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Old Sep 30, 2003, 03:07 PM
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ericfly's Avatar
Brazil, RS, Porto Alegre
Joined Jul 2003
164 Posts
Brushed motors

Try a twin-600 on a 3:1 gearbox, or twin 13-turn quad (or something close) on a 5:1 gearbox (twin means two motors in the same gearbox), and try 11x6 electric prop.
Eric
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Old Sep 30, 2003, 04:19 PM
jrb
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Edina, MN, USA
Joined Oct 1999
11,398 Posts
Here’s a “What works list” for an economical way to fly a 40ish plane on 12 cells/ two RC Car “Six Packs” (about 33 amps, 6 minutes plus duration w/2000s):

Jeti 35 (350) ESC – 12 cells & BEC:
http://www.hobby-lobby.com/jeti.htm

Propeller APC “E” 13x10:
http://www2.towerhobbies.com/cgi-bin...?&I=LXZL01&P=7

Trinity Maxx Mild (not the Wild!):
http://www2.towerhobbies.com/cgi-bin...?&I=LXWR55&P=7


When brushes are needed do this,
Brush upgrade to 5x5:
http://www2.towerhobbies.com/cgi-bin...?&I=LXBPF6&P=0

Spare armature:
http://www2.towerhobbies.com/cgi-bin...?&I=LXWR58&P=7


Gearbox -- 3.5:1:

Master Airscrew Gearbox:
http://www2.towerhobbies.com/cgi-bin...?&I=LXZ900&P=7

Great Planes Gearbox:
Pinion required – 13T 48 pitch
http://www2.towerhobbies.com/cgi-bin...?&I=LXEX11&P=7

Gearbox:
http://www2.towerhobbies.com/cgi-bin...?&I=LXSL79&P=7

Batteries:

Always best to buy Sanyo you can see:
http://www2.towerhobbies.com/cgi-bin...?&I=LXST62&P=7

Something cheap like this might work; I flew an E-Maxx boxed set of 2000 packs that were supposed to be Sanyo, they flew like Duratrax Sanyos:
http://www2.towerhobbies.com/cgi-bin...?&I=LXCLS6&P=7

I’ve flown the red, white, and blue plane below with the above; Global’s 56” American Flyer a heavy .40 ARF. The other are my other 40 ARF conversions, see my gallery: http://rcgroups.com/gallery/showgall...stype=2&si=jrb
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Last edited by jrb; Sep 30, 2003 at 04:48 PM.
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Old Sep 30, 2003, 09:15 PM
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shaneyee's Avatar
Singapore
Joined Aug 2002
758 Posts
How about the Dewalt 14.4V or 18V motors? They are cheap and powerful altough a bit heavy. An MEC Superbox or a ModelAirtech belt drive on the front....

Shane
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Old Oct 01, 2003, 04:31 AM
Registered User
Los Angeles Industry, California, United States
Joined May 2003
461 Posts
wow thanks for all the details jrb, youve really made this alot easier now!
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