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Old 08-29-2019, 03:02 PM
I_Fly is offline
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Total Recall (reference to the movie)

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Originally Posted by Shaun Evans View Post
Tom

Thanks for posting that. It seemed out of character given my experience with you over the phone, but now it makes sense. I imagine that can get frustrating since....yeah.... my manual does clearly state that. But I guess I'm just lucky because mine has only had a couple of 17-ounce tanks through it and hand-starts almost immediately
Now that it's mentioned, I recall reading this when setting up the plane back in February. My assumption had been that this sentence was more of a safety precaution than operating instructions. This is probably my issue since I have spent most of my life ignoring safety labels.

This is my first gas engine for RC. Many guys like it and note how it easily starts once broken in and tuned. I've taken a few good points away from the comments.

- Double check the voltage to the ignition (with a meter, should be 6V).
- Don't be afraid to open the throttle a bit to start it (I have been keeping it well below 1/4).
- With the bottom mounted carb some gas drip is normal, even healthy when opening the choke. (When i checked the plugs they were dry so I didn't think it's flooding)
- Use an electric starter!

Oddly enough I fooled with it for just a few moments last night. I took one plug out and tried to observe the spark while flipping. It started and ran for a few moments on one cylinder. I was somewhat surprised that it started and ran on residual fuel (tank had been empty for a few days).

It seems I can flip it fast enough for the ignition to pick up the sensor. The engine may be quite stiff so the drag/compression stroke on the second cylinder may be stiff enough to put a stop to running after it pops/fires). So break in and a bit of tuning is my priority. I'll be able to use a capable starter at the field this weekend to start and run it a bit. I'll buy one if needed after that.

Thanks for the info guys,

Carl
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Old 09-02-2019, 11:15 PM
Dennis P is offline
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Well I tried out a larger electric aerobatic plane and I must say the power was incredible but the flight time was not up to what I would have liked. I decided to swap out the power plant for gas. It had to be smooth as this was the electric version airframe, so a twin it was. I did a bunch of looking and reading about the VVRC 40cc classic and it was basically all good, so I thought it was the one to try. At 34.1oz without the ignition and mufflers it is light. And with the angled 1/4" plugs it is very narrow also. It easily fits in the Extras cowl. I had the make a new firwall and move it back to the same dimensions as the gas version of the plane. I also sheeted in the sides of the engine box as they where full of lightening holes due to it being the electric version. The plane is an Extreme Flight Extra 300 V2 78". The motor is spinning a Mejzlik 21x8 carbon . I did a bit of ground running(a few heat cycles with the cowl off). With the cowl back on I flew it and put 4 tanks through it in the air today. I must say I have never had an engine just run out of the box like this guy has (my DA120 was close). I checked the high and low needles to make sure they where what the manual recommended , I have not touched them sense! It is starting to get a bit of a rich babble that in a few more flights I will start to lean out but it idles perfect and transitions great as is. So far it seems to be pulling very strong and working great. I see why people on other forums have been happy for many years with these motors. We shall see how it is with a few gallons through it but so far I am impressed.
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Old 09-04-2019, 12:46 PM
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Very good job Dennis, have fun with that setup. We recommend the EF airplanes for our engines.
Thank you
Tom
Valley View RC
www.valleyviewrc.com

Quote:
Originally Posted by Dennis P View Post
Well I tried out a larger electric aerobatic plane and I must say the power was incredible but the flight time was not up to what I would have liked. I decided to swap out the power plant for gas. It had to be smooth as this was the electric version airframe, so a twin it was. I did a bunch of looking and reading about the VVRC 40cc classic and it was basically all good, so I thought it was the one to try. At 34.1oz without the ignition and mufflers it is light. And with the angled 1/4" plugs it is very narrow also. It easily fits in the Extras cowl. I had the make a new firwall and move it back to the same dimensions as the gas version of the plane. I also sheeted in the sides of the engine box as they where full of lightening holes due to it being the electric version. The plane is an Extreme Flight Extra 300 V2 78". The motor is spinning a Mejzlik 21x8 carbon . I did a bit of ground running(a few heat cycles with the cowl off). With the cowl back on I flew it and put 4 tanks through it in the air today. I must say I have never had an engine just run out of the box like this guy has (my DA120 was close). I checked the high and low needles to make sure they where what the manual recommended , I have not touched them sense! It is starting to get a bit of a rich babble that in a few more flights I will start to lean out but it idles perfect and transitions great as is. So far it seems to be pulling very strong and working great. I see why people on other forums have been happy for many years with these motors. We shall see how it is with a few gallons through it but so far I am impressed.
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Old 10-13-2019, 08:27 PM
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Well I have about 2.5 gallons through the VVRC40 twin now and it just keeps getting better. I have the midrange tuned good now so next to no babble. The engine hand starts effortlessly hot or cold and pulls the 21x8 Mejzlik hard. It runs so smooth, I could not be happier (well that is stretching it some) .
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