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  • October 31, 2020, 06:54:53 AM

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Author Topic: Modifying RC car engines  (Read 197 times)

Offline david smith

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Modifying RC car engines
« on: July 13, 2020, 10:20:12 PM »
I know that the racing guys running the OS 18 TZs dont have this issue but for other engines how do you modify the crank so you can mount a prop.

Offline Les Akre

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Re: Modifying RC car engines
« Reply #1 on: July 14, 2020, 08:37:46 PM »
Hi David

Well, you are half correct. There were two different models of .18tz engines. One had the pull start and normal front end that would accept props. You had to grind off the pull start nub on the end of the crank pin, then order a regular backplate from your favorite O.S. Dealer (or make one).

The second variant, looked similar to the engine in your post. They are the version that came with what's referred to as the "Serpent" crank. The front bearing portion of the shaft was 7mm if memory serves. So, you have to find a collet and drive plate from an engine that used the same crank dia., or have a set made. I found one that came off an Irvine .15 car engine. The next item, is making a sleeve nut for the crank, as the threads are much shorter on the Serpent crank engines. You also cut off the solid part of the crank, just ahead of the threads. If you have access to a metal lathe, and the skill, you could make these parts yourself. Or, perhaps someone listed in the business section of this forum would take on the project.

Good Luck

Les


Offline Motorman

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Re: Modifying RC car engines
« Reply #2 on: July 14, 2020, 09:40:39 PM »
You don't have to cut off the P shaft. I'll get some pics of my OS 25XZ front end. What engine are you looking at?


Motorman 8)
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Offline Peter Grabenstein

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Re: Modifying RC car engines
« Reply #3 on: July 15, 2020, 12:26:14 AM »
Hi David

If your crankshaft is 7mm dia you can find collet and propdrive from "FORCE" Engines.

 H^^
Peter
« Last Edit: July 15, 2020, 12:47:54 AM by Peter Grabenstein »
I hate pessimists, I prefer optimists.
Impossible is done immediately, miracles take longer.
I don't care who your father is ......... as long as I fly here,
Nobody walks, runs, floats or flies across my circle ......... not even to fetch fish, wine or bread.

Offline Peter Grabenstein

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Re: Modifying RC car engines
« Reply #4 on: July 15, 2020, 12:27:55 AM »
These are all NIB "FORCE" RC Car Pull-Start engines with
0,5mm in dia and depth cut down ASP/Magnum .15 XLS backplates.
Force CNC .15 with modified ASP/Magnum .15 XLS headclamp.
Force .17 with mod. SC headclamp.
Force CNC .21 with cut down RC Car headclamp.

For more machining pics click post #60 ,please scroll down.

http://www.rc-network.de/forum/showthread.php/692972-Car-Motor-Umbau/page4

and next page post #73

http://www.rc-network.de/forum/showthread.php/692972-Car-Motor-Umbau/page5

One of my CL Buddy's "Force CNC .21" testbench running.



http://www.controlline.org.uk/phpBB2/viewtopic.php?t=15517

http://www.controlline.org.uk/phpBB2/viewtopic.php?t=15489

 H^^
Peter
« Last Edit: July 15, 2020, 02:51:00 AM by Peter Grabenstein »
I hate pessimists, I prefer optimists.
Impossible is done immediately, miracles take longer.
I don't care who your father is ......... as long as I fly here,
Nobody walks, runs, floats or flies across my circle ......... not even to fetch fish, wine or bread.

Offline david smith

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Re: Modifying RC car engines
« Reply #5 on: July 22, 2020, 10:26:42 PM »
Thanks for the replies.  I have no doubt that I could do it but the price difference in the airplane version of one engine vs the car engine is 50 bucks and the car engine is one i know nothing about so I think I will just spend the extra on the airplane version. Maybe down the road I can play with modifying a car engine.

Offline Peter Grabenstein

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Re: Modifying RC car engines
« Reply #6 on: July 23, 2020, 09:44:08 PM »
I believe market for Nitro RC-Car engines in our Country is down,
reason why so many NIBīs on Discount, "SPECIAL OFFER".
New RC Car Racers trust on clean , not oily and quiet Lipo Power.

Discounts from -8% , to -26%.

https://www.conrad.de/de/search.html?search=Force%20Nitro%20motor&category=%1Ft16%1Fc37367

BTW, just for example ,
-26% Discount "Force CNC .15" , sells for 68USD + ship.
Sell the Pull Start unit + RC Carburetor (30USD) to someone which is looking for New parts.
38 bucks for a well made engine is quite a cheap project to start with in my eyes and wallet.
I guess other brands canīt beat that.
 H^^
Peter
« Last Edit: July 27, 2020, 12:29:34 PM by Peter Grabenstein »
I hate pessimists, I prefer optimists.
Impossible is done immediately, miracles take longer.
I don't care who your father is ......... as long as I fly here,
Nobody walks, runs, floats or flies across my circle ......... not even to fetch fish, wine or bread.

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