Re: engine question [TANKS]

[Grant Mahalek <gmahalek-at-shaw.ca>]

Jon,

On the contrary, using cheap light wiper motors seems to make sense.


Anyone else like to through their  "two cents" in.  Do you think 100rpm 
12vdc wiper motors in a light tank would work?


Grant
----- Original Message ----- 
From: "jon s kowitz" <jonskowitz-at-hotmail.com>
To: <tanks-at-rctankcombat.com>
Sent: Monday, March 07, 2005 7:22 PM
Subject: Re: engine question [TANKS]


>  Actually, I'm the only other dufus currently thinking of using wiper 
> motors to power thier tank with.  And as I don't even *quite* have a 
> rolling chassis yet I have very little "hands-on" experience with them. 
> What I will tell you is to think light, think VERY light.  The ones with 
> the highest output RPM that I've yet tested are the worm-geared motors out 
> of the 97+ Ford Crown victoria, and they only put out 120 - 140 RPM at the 
> shaft (though I was going to fiddle around with boosting input voltage to 
> 18v to see what happens).  This means that you're going to HAVE to use an 
> overdrive gear ratio to bring the sprocket RPM up to something approaching 
> reasonable. This is going to rob you of torque that you will need for 
> maneuvering so you simply have to minimize the amount needed (aka, light, 
> Light, LIGHT!!!), and a few weight distribution tricks won't hurt at all 
> either (like trying to concentrate as much weight over as small a span of 
> track as possible).  There was a previous letter on all the factors in 
> torque required to "skid turn" (I think they're talking about a 
> "pirouette" or a "nuetral turn", but I'm not sure).  Best of luck,
>
> Jon
>
>>From: paul needham <paul.2.needham-at-btconnect.com>
>>Reply-To: tanks-at-rctankcombat.com
>>To: tanks-at-rctankcombat.com
>>Subject: Re: engine question [TANKS]
>>Date: Mon, 07 Mar 2005 19:12:46 +0000
>>
>>grant
>>
>>err...........no ?
>>
>>sorry but I am http://home.btconnect.com/british_tanker/hetzer-body.htm a 
>>KCM man [ currently ]
>>
>>Paul
>>
>>At 14:57 07/03/2005, you wrote:
>>
>>>Paul,
>>>
>>>
>>>Could you with please share your actual hands-on experience using 
>>>windshield wiper motors as drive motors on a light tank.....are they a 
>>>suitable drive motor....does anyone else have any experience/comments?
>>>
>>>I'am looking for economical drive motors for a Hetzer.
>>>
>>>Thanks
>>>
>>>Grant
>>>
>>>
>>>----- Original Message ----- From: "paul needham" 
>>><paul.2.needham-at-btconnect.com>
>>>To: <tanks-at-rctankcombat.com>
>>>Sent: Monday, March 07, 2005 12:06 AM
>>>Subject: RE: engine question [TANKS]
>>>
>>>
>>>>Nick
>>>>
>>>>I am not saying the seat motors don't/won't work but the thought was to 
>>>>only employ constant duty motors as drive motors as they are built to 
>>>>run longer ? better brushes and heat dissipation etc
>>>>
>>>>eg use wipers , radiator fans and not window motors , seat motors etc
>>>>
>>>>But I have no experience with this , your choice for you application is 
>>>>sound though ?
>>>>
>>>>Just tryng to save someone from disappointment
>>>>
>>>>Paul
>>>>
>>>>At 22:09 06/03/2005, you wrote:
>>>>
>>>>>I did a test run of the motor I got for my swampcat turret.
>>>>>The turret, heavily armored and much larger than a breadbox,
>>>>>weighs a ridiculous 50+ pounds.
>>>>>
>>>>>The motor, smaller than a grapefruit, was made to move the
>>>>>drivers seat of a toyota/lexus back and forth and lemme tell
>>>>>you, it's got power!  It's also geared low enough so I don't
>>>>>have to add any additional gears. It spins the turret without
>>>>>any problem.
>>>>>
>>>>>So while your brother is getting motors out of cars, I'd suggest
>>>>>looking at the power seat motors, too.
>>>>>
>>>>>Two (or even 4) would probably move a supply vehicle nicely.
>>>>>Maybe even a tank, too.
>>>>>
>>>>>
>>>>>Nick  (AC003)
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>-----Original Message-----
>>>>>From: tanks-admin-at-rctankcombat.com
>>>>>[mailto:tanks-admin-at-rctankcombat.com]On Behalf Of Erik Wie
>>>>>Sent: Sunday, March 06, 2005 7:11 AM
>>>>>To: tanks-at-rctankcombat.com
>>>>>Subject: RE: engine question [TANKS]
>>>>>
>>>>>
>>>>>My brother is driving a tow truck and they have some scrap cars at his 
>>>>>job.
>>>>>he said he could get me two from same type of cars, just don't know yet
>>>>>what I will get
>>>>>but I can wait a little for them if they work.. I get them for free :)
>>>>>
>>>>>Erik
>>>>>At 04:07 06.03.2005, you wrote:
>>>>> >That's what I'm using :)
>>>>> >
>>>>> >We'll see how well it works...  (Using some old-style MOPAR wiper 
>>>>> >motors,
>>>>> >what have you got?).
>>>>> >
>>>>> >>From: Erik Wie <erik-at-mail.kaldenord.net>
>>>>> >>Reply-To: tanks-at-rctankcombat.com
>>>>> >>To: tanks-at-rctankcombat.com
>>>>> >>Subject: engine question [TANKS]
>>>>> >>Date: Sat, 05 Mar 2005 20:21:07 +0100
>>>>> >>
>>>>> >>I'm building on a low budget (according to my fiance I got no budget
>>>>>at
>>>>>all)
>>>>> >>
>>>>> >>I can get two car wipers engines..
>>>>> >>Will that be useful as engines for my tank?
>>>>> >>Anyone tryed that?
>>>>> >>
>>>>> >>Erik
>>>>> >
>>>>> >
>>>>> >
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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>>>>
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>>>>
>>>
>>>
>>>
>>>
>>>
>>>
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