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Author Topic: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)  (Read 5422 times)

Bluechrisp

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High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« on: May 05, 2009, 09:19:29 pm »
Hello all,

I have a 36''  by 9''  sports hull, i'm looking to put a Graupner Jet Propulsion Unit (2340) into it, idealy a Graupner 700BB would be installed, how ever, what high torgue brushless motor could be used instead?
Any help would be great.  :-))

Many thanks

CP

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brodjack

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #1 on: May 09, 2009, 09:56:56 am »
CP,it all depends on what number of cells you will be using,and either Lipo,Nimh,Nicd ?
Brod...
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Bluechrisp

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #2 on: May 29, 2009, 12:11:20 am »
Hi Brod,

Looking to use either standard 12v SLA, or a 12V + Nihm. I believe I need a high torque motor.  :-))
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debssnal

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #3 on: May 29, 2009, 05:56:50 pm »
Hi Bluechrisp,this is what you get when you fit a high torgue brushless motor to the jet unit
http://www.youtube.com/watch?v=Jn2QxbhaJUs
this boat is 54" long and comes in at 15kg
Some think on
kind regards Alan

ps i will be running it at Alford this weekend
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boatmadman

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #4 on: May 29, 2009, 09:20:33 pm »
Alan,

What is the spec on those motors? Dia, length,kv,winds?

Ian
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if at first you dont succeed.....have a beer.....

SteamboatPhil

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #5 on: May 29, 2009, 09:24:35 pm »
Al

Stop it or they will all be as mad as you !!!!!!!

Hope to see you at Alford tomorrow (please tell me Andy's not there)   ok2
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Steamed up all the time

debssnal

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Re: High Torque brushless or 700BB for Graupner Jet Propulsion Unit (2340)
« Reply #6 on: May 29, 2009, 10:45:00 pm »
Hi Ian, they are Tornado Thumper 4250 Brushless motor - 720 watt motor, 800 kv.
I would say that the Tornado Thumper 4260 Brushless motor - 900 watt motor, 600 kv is a better alround motor
hope this is of some help
kind regards
Alan
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