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K&B dragster .

1233 Views 30 Replies 5 Participants Last post by  pineman
Scored this in a lot of chassis and I'm looking at seeing if the motor is alright, but it needs the spring setup for the brushes.
I'm not sure what this motor is ,I know it's a Pitman but not sure of the model? I've found a site that's got some nos parts of them but I'm not sure if there the right ones. The motor also has a 1/8" shaft ,5 poles .
If anyone has any information and pictures of the brushes and spring setup it would be great to see what I'm looking for.
Cheers,
John.
PS, the last picture of the motor brush is how I received it !馃 Which would only short out the motor and stuff it!
Hence the need for pictures and information, so I can get this old motor running again.
John.
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Hi John,

It's a Pittman DC85, a favorite dragster motor in the early years. As shown the brush setup would actually work if the two ends of their "spring" were insulated. It was originally a coil spring with two fiberboard T shaped holders - let me see if I can find an example. Pretty much all the early open frame motors used the same basic setup.

The other variant is the Kemtron style motor in the bottom row with cylindrical button brushes and a shorter coil spring behind them, held on with a metal cap.

Don

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Don't seem to have a direct photo of the brush setup, but can post if needed.

Don

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Thanks for the information I'll have a look at the site with the Pitman spare parts and see what I can find now I know what to look for!
Thanks Don,
John.
If not, let me know and I'll look in the spares drawer!
Don
Had a good look and couldn't find any brush hardware for the DC85 but did find K & B 1/8" spur and pinion 1:2 raito at least it's a start on the gearing side, I have a set of drag car slick tires .
So if you wouldn't mind having a look Don that would be great, thanks.
It would be great to have the correct brushes for it but if I have to ,as you said I can try and insulate what I have!
John.
John this is what the setup looks like, pretty easy to replicate using some circuit board material (phenolic sheet) and a similar sized spring, ball point pen maybe? Ram photo is for different motor but same setup.
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Great thanks, yes that's what I was thinking of making now I have seen it shouldn't be too hard.
John.
I seen some pictures of this sort of drag setup and they are using a brass type of spring a little like the last picture but insulated.
Great thanks, yes that's what I was thinking of making now I have seen it shouldn't be too hard.
John.
I seen some pictures of this sort of drag setup and they are using a brass type of spring a little like the last picture but insulated.


Is this what you looking for?
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Hey John, don't make them just yet. I think I have what you need. If I remember correct they are the HOP-UP-KIT. Like the pic.Lee posted.
I will take pics tomorrow of what I have. They are NOS and should be cheap to ship?
Martin.
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Wonderful, that would be great thanks! Looking forward to it.
John.
Had a dig around and found some wheels and tires for it as well.
Not sure what sort of gearing this will need,had some Cox ones and put them on so it will move once I get the brushes sorted out.
John.
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No there different types to what this motor users, they look more like Scalextric power sledge brushes or similar ones.
Thanks anyway for posting them and trying to help out.
Cheers,
John.
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Hi John,

Gear ratios on these were usually in the 2:1 to 3:1 area, the higher numerical for the higher winding motors (6V arms, rewinds, etc.). If that's a stock DC85, I'd start with about 2.5:1 - and if Martin can't help on the brush gear, give me a shout.

Don
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Thanks Don,I ordered both 2:1
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K&B gears from the states last night.
I will let you know if he can help me out straight away Don .
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Hi John, this what I have. I know very little about these motors so please tell me what you need here?
I look forward to getting some education on these type of motors.
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Thought I'd post this K&B I restored last summer to spur you on.
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Thought I'd post this K&B I restored last summer to spur you on. View attachment 342655
View attachment 342654

What body will fit on these, would like to see what are you and Rastas planning to put on these?
These dragsters weren't really designed for bodies as such; they're just generally covered with a metal sheet, which was included with the K&B dragster, but not with Russkit's version. I've also included a shot of the rarer International version, which has a "closed" body.

Don

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This is the original box and parts the kit had, you can just make out the flat peace of aluminium under the parts. Notice that the kit did not come with a motor! As Don said above these Pitman 85 motors were the choice of drag motors back in the day.
Cheers,
John.
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Hi John, this what I have. I know very little about these motors so please tell me what you need here?
I look forward to getting some education on these type of motors.
View attachment 342619 View attachment 342620
PM on the way.
Cheers,
John.
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