Model Boat Mayhem - Forum

Dry Dock / Shipyard: Builds & Questions => Working vessels R&D: => Topic started by: Ian Robins on August 01, 2007, 11:02:42 PM

Title: Imara help needed
Post by: Ian Robins on August 01, 2007, 11:02:42 PM
Hi all,
One of our members at Northampton and district model boat club, has asked me to fit a motor and speed control to the above tug.
He has 12v gell batteries and a blower motor (amps very high 12+)
What would/have you used on this sized tug.

I am thinking Graupner 500E motor geared 5:1 driven with an Electronize speed control

Any Ideas

ro88o
Title: Re: Imara help needed
Post by: farrow on December 31, 2007, 05:28:32 PM
Speak to Bob aka Shipmate 60. He has one in his garage and it behaves well in the water.
David
Title: Re: Imara help needed
Post by: DickyD on December 31, 2007, 05:56:27 PM
Check out Bobs Imara.

http://www.modelboatmayhem.co.uk/forum/index.php?topic=7941.0


 O0
Title: Re: Imara help needed
Post by: FullLeatherJacket on December 31, 2007, 06:27:36 PM
Robbo

"A" motor? Isn't this a twin-screw model? Sure looks like two Decaperms in Bob's version. If so, I'd recommend MFA Torpedo 500 6:1 geared units for a 12v supply. Just one of these pushed my Model Slipway Envoy round in fine style on a 70mm x 4-bl brass prop. For a single screw/motor the Graupner Speed 720 Torque or Robbe Power 1000 would suit a model this big, but there's also a Protech equivalent around which is apparently just as good and much less expensive. I think Wingertaz has more info on these. They draw much less than the current you're quoting for the Scrapyard Special.

BYW there are suitable ESCs other than those made by Electronize and MTroniks? Some suppliers even give a 5% discount to Mayhem members........ ::)

HNY

FLJ
Title: Re: Imara help needed
Post by: Shipmate60 on December 31, 2007, 06:44:39 PM
In an Imara I would go for the direct drive as suggested by FLJ.
Too many of these tugs suffer from gearbox whine when she was a STEAM tug.
The Deccaperms in mine of course for some reason are very quiet (true)
But my choice would always be a direct drive in this tug running at no more than 3000 rpm.

Bob