Will Graupner 720 Tourqe  
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Will Graupner 720 Tourqe - 8/30/2008 3:48:29 AM   
hansvonpensch


 

Posts: 306
Joined: 11/19/2005
From: , FL, USA
Status: offline 		My questian is, will the Graupner 720 Tourqe turn a Rabosh 4 blade 3" dia, 3" pitch blade efficently. Thanks, Randy.
       Post #: 1

RE: Will Graupner 720 Tourqe - 8/31/2008 2:14:42 AM   
subsinker



Posts: 406
Joined: 1/14/2004
From: Dwight, IL, USA
Status: offline 		SPEED 720 BB Torque6-12 V Graupner 6372 Twin ballraced, 8-pole armature.

Special high-performance motors with integral
suppressors. Characteristic high torque at low rotational speeds, therefore ideal for use in direct-drive model boat power systems with large
propellers.


Nominal voltage 12 V
Operating voltage range 6 ... 13 V
No-load rpm 4100 min–1
No-load current drain 0,75 A
Current drain at max. efficiency 3 A
Current drain when stalled 13,5 A
Max. efficiency without gearbox 75 %
Length of case, excl. shaft 72 mm
Diameter 44,5 mm
Free shaft length 6,5 mm
Shaft diameter 5 mm
Weight 380 g

Looks like it will to me based upon the specs

Pete

_____________________________

There are two types of ships: submarines and targets

(in reply to hansvonpensch)
       Post #: 2

RE: Will Graupner 720 Tourqe - 9/1/2008 2:48:13 AM   
hansvonpensch


 

Posts: 306
Joined: 11/19/2005
From: , FL, USA
Status: offline 		In about 3 weeks I will let you know, how it turns out, thanks, Randy.

(in reply to subsinker)
       Post #: 3

RE: Will Graupner 720 Tourqe - 9/7/2008 11:35:55 PM   
hansvonpensch


 

Posts: 306
Joined: 11/19/2005
From: , FL, USA
Status: offline 		Ran it today for about 5 minutes, constant, and the motor was cold. The tug boat is about 20 pounds and has a displacement hull and was plowing the water. On full speed it started to look as if it would plow the front end under, a 36" Shelly Foss with a 12" beam. The motor preformed great.

(in reply to hansvonpensch)
       Post #: 4

RE: Will Graupner 720 Tourqe - 9/13/2008 1:10:36 PM   
rye



Posts: 527
Joined: 1/1/2003
From: chicago, IL, USA
Status: offline 		hi
i am using these motors for my 1/16 scale landing craft could you tell me what size the bolt holes are thanks rye
http://www.rcgroups.com/forums/showthread.php?t=912756

(in reply to hansvonpensch)
       Post #: 5

RE: Will Graupner 720 Tourqe - 9/14/2008 7:59:37 PM   
hansvonpensch


 

Posts: 306
Joined: 11/19/2005
From: , FL, USA
Status: offline 		I remember going to Home Depot with a Grapner 700 in my hand and had to trial fit some screws off the shelf, I am 99.5% sure I use the extra screws that worked on the 700s.

(in reply to rye)
       Post #: 6

RE: Will Graupner 720 Tourqe - 9/15/2008 10:49:31 PM   
Stavros Mayhem


 

Posts: 4
Joined: 8/28/2007
From: BethesdaGwynedd, UNITED KINGDOM
Status: offline 		you will have not problems with that set up at all I run the same motor in a Tid Tug at 40ins and that weighs in excess of 40lb runs all day without even breaking into a sweat


Stav

(in reply to hansvonpensch)
       Post #: 7

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