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Author Topic: 9' foot Aircraft carrier - motors?  (Read 3367 times)

Martin [Admin]

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9' foot Aircraft carrier - motors?
« on: April 03, 2007, 02:57:56 PM »


Via email to Mayhem....

Hi  there Martin,
 
I  hope  you  can  help,  I  am  presently  building  a  9  foot  1:144  scale  USS  Enterprise  aircraft  carrier,  and  I  need  4  motors  to  power  it,  2  motors  each  running  off  Electronize  FR15  speed  controllers  and  a  12volt  battery,  what  do  you  suggest,   its  my  first  attempt  at  model  building.  I  have  4  x  540  in  at  present  and  it  is  VERY  slow  and  takes  a  long  while  to  start  moving  and  the  motors  get  VERY  hot.

What  about  golf  trolley  motors  BUT  they  spin  at  150rpm  is  that  too  slow?
 
Thanks,
Melville
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gingyer

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Re: 9' foot Aircraft carrier - motors?
« Reply #1 on: April 03, 2007, 03:40:43 PM »

Hi there,
I would suggest getting some car fan motors
I have seen a 1/96th scale Nimitz ran on these
and it performed well. If you look in the link below
some people are discussing the best motors to use

http://www.modelboatmayhem.co.uk/forum/index.php?topic=3460.0
hope this helps
Colin
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Shipmate60

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Re: 9' foot Aircraft carrier - motors?
« Reply #2 on: April 03, 2007, 05:22:09 PM »

What size props you running on her?

Bob
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Mike_K

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Re: 9' foot Aircraft carrier - motors?
« Reply #3 on: April 03, 2007, 06:52:55 PM »

Melville,

I'm working on a CV-6 USS Enterprise of about the same size.  I just ordered 4 of the motors found in the following link:
http://www.allelectronics.com/cgi-bin/item/DCM-266/400200/DC_MOTOR,_3-24_VDC_.html

They seem to be Graupner Speed 700 in size and performance.  Seem a good deal at $3.50 each, that's a bit less than 2# each (I don't know how to make the UK Pounds sign on my computer).

A couple of reviewers used them to replace the motors in the children's toy "Power Wheels".  That's the "Barbie Jeep" sized toy that children ride in.

Hope this helps.

Mike
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PSSHIPS

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Re: 9' foot Aircraft carrier - motors?
« Reply #4 on: April 03, 2007, 09:21:30 PM »

9 feet at 1/144th scale?, its closer to seven and a bit surely, I used 4 Buhlers in mine when I did scratch building in the old days on 6 Volts, the medium Buhlers and before anyone starts, YES, I have probably splet boolers wrong!
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Shipmate60

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Re: 9' foot Aircraft carrier - motors?
« Reply #5 on: April 03, 2007, 09:25:53 PM »

Paul,
Where do you get Buhlers from now?

Bob
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Mike_K

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Re: 9' foot Aircraft carrier - motors?
« Reply #6 on: April 03, 2007, 09:34:18 PM »

Melville--  What does your great beast of a model weigh?  I'm wondering how much ballast I need to scrounge up.
Mike
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DickyD

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Re: 9' foot Aircraft carrier - motors?
« Reply #7 on: April 03, 2007, 09:40:00 PM »

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Shipmate60

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Re: 9' foot Aircraft carrier - motors?
« Reply #8 on: April 03, 2007, 09:47:47 PM »

No prices Richard.
Scoonies used to sell them reasonably priced.

Bob
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PSSHIPS

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Re: 9' foot Aircraft carrier - motors?
« Reply #9 on: April 03, 2007, 10:41:42 PM »

I can source them now, but, they used to be 25 quid, now they are comming in at about 50 "OUCH"
 Worth it though.
 Paul...
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boatmadman

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Re: 9' foot Aircraft carrier - motors?
« Reply #10 on: April 03, 2007, 11:26:59 PM »

Model motors direct do Buhlers

Ian
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Shipmate60

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Re: 9' foot Aircraft carrier - motors?
« Reply #11 on: April 05, 2007, 02:05:39 PM »

But what size props is she running?

Bob
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Mike_K

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Re: 9' foot Aircraft carrier - motors?
« Reply #12 on: April 11, 2007, 08:47:06 PM »

The four motors arrived yesterday.   I'll try to make time to test them this weekend and post the results.  I have a handfull of props from 45mm to 60mm.  I'll run the test at 12v direct drive.

Mike
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Bryan Young

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Re: 9' foot Aircraft carrier - motors?
« Reply #13 on: April 12, 2007, 11:20:29 PM »

As always, a possible alternative solution.
Go with the car fan motors (or similar), but only drive 2 props and let the other 2 freewheel. You won't see any difference in performance and slow speed handling could be better. BY
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Shipmate60

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Re: 9' foot Aircraft carrier - motors?
« Reply #14 on: April 20, 2007, 11:03:45 PM »

For those size props a 2:1 or 3:1 gearbox on a 550 motor will drive her well and with the 550 motors you have the option of using 6 or 12 volts.

Bob
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Mike_K

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Re: 9' foot Aircraft carrier - motors?
« Reply #15 on: April 29, 2007, 12:29:25 AM »

A quick note to follow up on the motors I ordered:  They arrived a few weeks back and I wasn't happy with the low speed performance of the motors with any of the esc's that I have.  I've found that the Astro Flight 208D Marine esc is a very, very nice unit.  I was lucky enough to find a brand new pair on ebay for a very nice price.  I haven't tested them with the Astro Wattmeter under load yet but the lowest speed on the Astro's is very slow tick-over of the prop.  One of my favorite things to do is to have the throttle set for just a few clicks of power and see if I can maintain control with the prop just ticking over.  When I get couplings and prop shafts sorted I'll test and post the results.

Mike
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