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Old 01-04-2009, 06:12 PM
  #1  
fasterrcs
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Default chainsaw engines

has anyone tried a chainsaw engine . this one on youtube would make the car fly it even had a tuned pipe and all
http://www.youtube.com/watch?v=wMTv7cCBVzE
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Old 01-04-2009, 06:25 PM
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Default RE: chainsaw engines

Many people have.Vhainsaws engines,weed eater engines,leef blowers etc....Check the build of Lars_from_Norway.Problems with those engines commonly are,the weight,a clutch setup and they turn slower than the zens and the cys
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Old 01-04-2009, 06:27 PM
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Default RE: chainsaw engines

They also don't make the power the Zenoah and CY do.
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Old 01-04-2009, 06:29 PM
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Default RE: chainsaw engines

What about this saw? It even has a DDM Dominator pipe on it!
http://www.youtube.com/watch?v=_Ddw6...eature=related
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Old 01-04-2009, 06:32 PM
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Default RE: chainsaw engines

I bet you will NEVER use this chain saw for any RC applications!
http://www.youtube.com/watch?v=Rj7Fh...eature=related
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Old 01-04-2009, 07:29 PM
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Default RE: chainsaw engines


ORIGINAL: SAVAGEJIM

What about this saw? It even has a DDM Dominator pipe on it!
http://www.youtube.com/watch?v=_Ddw6...eature=related
those are competition chainsaws scary as hell
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Old 01-04-2009, 07:38 PM
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Default RE: chainsaw engines

you can use chainsaw engines to build one of these lol http://au.youtube.com/watch?v=DDWqJe...=rec-HM-rev-rn
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Old 01-04-2009, 08:13 PM
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Default RE: chainsaw engines

Lol, can you say "Tennis Elbow?"

That is simply funny
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Old 01-04-2009, 08:17 PM
  #9  
splcrazy
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Default RE: chainsaw engines

im amazed how they started on the first or second pull
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Old 01-04-2009, 08:18 PM
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Default RE: chainsaw engines

ORIGINAL: splcrazy

you can use chainsaw engines to build one of these lol http://au.youtube.com/watch?v=DDWqJe...=rec-HM-rev-rn
I could make something like that,seems fun.But now that i think of,i'm pretty busy at mornings,i barely make it to work on time.If i had to fire up like 40 chainsaw engines,then the boss would fire me
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Old 01-04-2009, 08:50 PM
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Default RE: chainsaw engines

the prob with fittin chainsaw engines into the regualr 1/5scale is they run in the opposite direction to the zen/cy
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Old 01-04-2009, 08:53 PM
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Default RE: chainsaw engines

Ah! that is a good point! I guess to correct that is to put the engine in backwards or correct the rotation with gears. I prefer the gear method since ou can also do you gear reduction at teh same time as correct the rotation.
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Old 01-04-2009, 10:02 PM
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Default RE: chainsaw engines

ORIGINAL: Giorgos_cupra

they turn slower than the zens and the cys
at how many RPM the cy and zen run? and how much on a chainsaw
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Old 01-05-2009, 04:19 AM
  #14  
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Default RE: chainsaw engines


ORIGINAL: SAVAGEJIM

Ah! that is a good point! I guess to correct that is to put the engine in backwards or correct the rotation with gears. I prefer the gear method since ou can also do you gear reduction at teh same time as correct the rotation.
or with a simple adaptor plate for the ign ,you could "reverse" the engines rotation!!!
the only tricky part would be modifying the pullstart

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Old 01-05-2009, 04:32 AM
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Default RE: chainsaw engines

ORIGINAL: yaris

ORIGINAL: Giorgos_cupra

they turn slower than the zens and the cys
at how many RPM the cy and zen run? and how much on a chainsaw
typically the cy/zens will do around 18000
a typ chainsaw, around 7000... but producing a buttload of torque
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Old 01-05-2009, 06:15 AM
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Default RE: chainsaw engines

I went to the Mower shop and asked the guys a few technical questions;

1. how many revs out of a typical saw motor?

A: about 8,000

2. what about if it had a "pipe" ?

A: double

3. what if I ran it on nitro?

A: I wouldn't do that

to run on methanol. you'll need a larger carb (or at least the std. one jetted up quite a bit)
Petrol has a higher volatility than conventional hobby methanol/nitro/oil fuels

I also asked the people at the KTM Pro Cycle shop

best fuel mix?

A. Best pump fuel you can get (here in Aus .. = Optimax, or V power these days)
Plus a good 2T oil (or Klotz)
Plus 5% benzene ......that's all

there's a Stihl saw on the market, best out there...has about 5-6HP and around 1 Metre bar

I'll find the model No. and get back to you

I've seen old Homelite and McCullochs and Dolmar (coppertop) models get some seriuos output
Also there's a fella in the US who uses 90cc Solo saw motors (with a custom billet bottom end) shred gears on skellenger rear ends with a nitrous set up in his 1/4 funny cars and rails.
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Old 01-05-2009, 06:25 AM
  #17  
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Default RE: chainsaw engines

OK

Stihl MS 880 Magnum 121.6 cc 6.4kW = 8.5825 HP

Stihl MS 660 Magnum 91.6 cc 5.7 kW = 7.6438 HP

Stihl MS 460 Magnum 76.5 cc 4.4 kW = 5.9005 HP

http://www.stihl.com.au/Products/pro...m?iModelID=339

or ask these guys

http://www.arboristsite.com/forumdisplay.php?f=56

a wealth of info and a whole world away from the conventional stuff you see here
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Old 01-05-2009, 06:59 AM
  #18  
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Default RE: chainsaw engines

Man you guys are twisted!!!!! Those comp saws actually use (more commonly anyway) a split rotax 250cc or bigger. That thing would have powered my Kawasaki just as well as the 200cc it had in it! I don't think the tranny would survive in a 5B or anything else but man would that be sick for he little while it lasted!
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Old 01-05-2009, 10:17 AM
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Default RE: chainsaw engines

You can use chainsaw motors but the power to weight ratio is bad for speed. Most who use chainsaw motors use them for pulling trucks and tractor where the weight isn't a problem. the other problem is the clutch setup. [] NOT the most ideal setup with a sprocket welded to the clutch drum. The direction of the motor is not a problem. Adding just a pipe is not good .[] You need to make sure your engine can handle the RPM or eles you buy a new engine.[]
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Old 01-05-2009, 11:34 AM
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Default RE: chainsaw engines

the rods wont handle the rpms, i had a poulan that couldnt see past 13k- granted it was 5hp. and i think most people who use them put them in planes, so i think that tells you about power to weight.
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Old 01-05-2009, 12:05 PM
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Default RE: chainsaw engines


ORIGINAL: bsrman14

You can use chainsaw motors but the power to weight ratio is bad for speed. Most who use chainsaw motors use them for pulling trucks and tractor where the weight isn't a problem. the other problem is the clutch setup. [] NOT the most ideal setup with a sprocket welded to the clutch drum. The direction of the motor is not a problem. Adding just a pipe is not good .[] You need to make sure your engine can handle the RPM or eles you buy a new engine.[]
That is not correct. Power to weight is not as much as an issue as Torque to weight would be. So, lets say a a chainsaw makes 2HP and a CY 26cc makes also 2HP.
By the formula of HP, it is very possibe for the CY to have the very same HP as the chainsaw engine, but the chainsaw engine make considerably more torque.

Since torque is a direct force acting on a moment arm, it is torque that accelerates the RC, torque that turns high gear ratios, and torque that allows an RC to maintain a given speed. So, lets say a CY makes its max HP at 15000 RPM and the chainsaw enegine makes its at only 6000RPM. The chainsaw MUST make much more torque to get that 2HP where the CY gets its 2HP from a much higehr RPM, but it definitely maens much less torque than the Chainsaw engine.

What does this mean? The chainsaw engine can be geared much much higher to compensate for its miserably low RPM. Not only that, it will make the RC accelerate just as fast as the CY because the massive torque makes up for its heavier weight.

Also, In airplanes, many guys have made many home built airplanes using 25cc, 30cc, and 35cc weed eater engines, and they have the torque to turn very large diameter props to create the thrust needed to fly the airplane.
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Old 01-05-2009, 12:08 PM
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Default RE: chainsaw engines

and how about a scooter engine? some of them can revs at 10500, and even a bit more.
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Old 01-05-2009, 12:10 PM
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Default RE: chainsaw engines

It depends on the size of the engine I guess. I know that most chainsaw engines are small enough to possibly shoe-horn into a 5th scale, but for a scooter engine, that would probably be required to fit into an RC no smaller than a 4th scale.
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Old 01-05-2009, 12:24 PM
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Default RE: chainsaw engines

I toy'd with the idea of using a stihl 09 chainsaw engine several years back. I found the magneto (coil) hung below the engine (crankcase) so the only real way I saw to install it was to lay the motor down or relocate the magneto (coil).
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Old 01-05-2009, 12:43 PM
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Default RE: chainsaw engines


ORIGINAL: motionmachine

I toy'd with the idea of using a stihl 09 chainsaw engine several years back. I found the magneto (coil) hung below the engine (crankcase) so the only real way I saw to install it was to lay the motor down or relocate the magneto (coil).
I guess relocating it would probably be best, for the sake of maintaining easy access to the plug. Of course, you would have to custom fabricate rigid and sturdy brackets to hold the magneto in its new position.

As for laying the engine horizontally, there are RCs that have the engine laid down in such a manner, some FG on-roaders do just this.
And if you are custom building your own RC from scratch, you could of course design it for easy access to get to both the plug and the coil.
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