2c vs. 4c - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-19-2005, 11:00 AM   #1
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2c vs. 4c

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I am considering an engine for my winter project, an 80" T-34B Mentor.

I have to choose between a 2-stroke .61-.91 or 4-stroke .91-1.20.

I have no experience with 4c. How does tuning a 4c compare with a 2c.

Price aside, which is recommended.

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Old 09-19-2005, 01:24 PM   #2
Gary Maker
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I am: Gary M.
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Location: Stoney Creek, Ontario
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"Price aside"... A phraise hobby stores love to hear! LOL!

My personal choice would be to definitely go with the fourstroke for more realistic sound and scale performance. Has a much smaller muffler to deal with to house inside the cowel.

Setup and tuning is really not that much different than a two stroke. I am most familiar with Saito engines although I'm sure there are little in the way of differences in the operations of other makes unless your running a pump etc.

The manual will run you through the starting and setup proceedures. Just follow that and you cannot go too far wrong. Usually is just open the high speed needle to a good rich setting, somewhere from around 3 to 5 full turns open the first time starting. Its a good idea to use a tach if you have one available to fine tune your settings from this starting point! Take the time to follow the breakin procedures as outlined in the manual and for adjusting the high speed and low speed needles and you will have a smooth and relyable running engine that will last you for many seasons of enjoyable flying.

I love the performance of a four stroke because of the higher low end torque and the ability to swing a larger prop than that of a compareable sized 2 stroke. The looks, the sound, the performance all add up to make a fourstroke my personal choice for a "Scale" model airplane!

All the best with your project and your choice. I'm sure others will have something to add to help you in making your decision and I hope what I have said is of some benefit to you!
Stoney Creek Hawks RC
MAAC No. 43659

Radios used: Spektrum DX6i
Current builds: 1/4 scale J3 Cub & Neiuport 17 and KMP B-25.
Currently flying: Scratched Tele 40, Parkzone Stryker & 60" SPAD Debonaire


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