VVRC/RCGF 30cc twin
Smooth operation, Smaller size
Piston displacement Cylinder (cc) : 30cc (1.83 cu in)
Bore x Stroke (mm): 1.26 in(32mm) x 0.77 in (19.6mm)
Carburetor : Genuine Walbro
Ignition : DC-CDI (Computer Controlled auto advance, electronic ignition system)
Power supply: 6-8.4V
Maximum Output :3.7HP /7500rmp
Requires: Gasoline, 2-cycle air cooled oil, ignition battery & propeller
speed rang : 1500-8500rpm
Gasoline-Version : Pre-mixed Fuel, Recommend:32:1
(87% otcane unleaded gasoline
Lubrication Oil : 2 cycle engine oil
Suggested Propellers: 18x8, 18x10, 19x8 & 20x8
Suggested Break-in Prop: 19 X 8
Sparking plug: 1/4-32 size spark plugs
Cooling System : Air Cooled
Package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.
Engine: 2.03 lb (923 g)
2XMuffler: 2.71 oz (77 g)
Ignition Module: 5.1 oz (145 g)
Total: Weight: 2.53 lb (1145 g)
Based On 4 reviews.
I had to have a "twin" for my 1/4 Space Walker II Sig Kit. With a few minor modes to the cowling, it fit pretty nice and having both the cylinders sticking outside the width of the cowling, gave my Space Walker a much more scale appearance. Once I got fuel pumped up to the carb, I gave her a couple flips, and she started up. I didn't check the factory needle settings, and I wished I would have as they were set about 1/4 turn on the lean side for a fresh engine break-in. I caught it, and fattened up the settings after a few minutes of idle break-in. No harm, no foul, but worth looking at instead of assuming they where correct out of the box. After burning a full tank of gas, (20oz), by the book at 2500rpm, she ran like a top and idled KILLER! I had the engine still set on the fat side for continued break-in, and took her to the field for a maiden. She ran flawless, sounds awesome, and gave me a worry free maiden flight. I was getting cylinder head temps in the 165-170 degrees range, so I know she was fat on the needles. I used a VVRC Laminated XOAR 18x8 prop for the maiden, which was a perfect match. The engine noise level is a bit on the high side for our field so I have to be careful about full throttle passes, even though I don't plan on flying with that kind of gusto. It's in a SPACE WALKER! I am VERY pleased with the install and the way this little twin sounds, runs, and transitions. A++ as far as I'm concerned, I have plans for a few more of these. There's really nothing like the sound of the twin. I did note that engine torque is definitely noticeable on my particular aircraft, which is something that a twin will generate slightly more of than a single holer.
Just an update....I've had the engine for a year now, and got it flying in a Hanger 9 Beaver this spring. After a dozen flights, I am still delighted with this engine. It will take off and fly at just over 1/2 throttle, so there is lots of reserve power if the need arises. It has been totaly reliable. .....and sounds fantastic. There have been a few issues starting it at the beginning of the day, but I believe that is due to the way I had to run the fuel lines. The use of an electric starter fixed that for now...I will re-do the fuel lines over the winter.
several guys have this engine in our club. very impressive
I am saving up to buy one in the near future for a cub.
It is 9.0" from plug cap tp plug cap, so it will fit many 30cc cowls. This one is going in a Hanger 9 Beaver. Overall quality looked very impressive.....except the carb was loose. The attatched bolts were too long and bottomed out before the carb was firmly seated. ( we have found this on brand name engines as well) . Some quick dremel work, and that was fixed up. After checking all the needle settings, it started by hand. This is a happy little engine at idle--which is surprising low. Even on the first run, throttle response seemed pretty snappy, although it was not close to being properly tuned yet. It seems to be quieter than a single cylinder engine the same size. I stopped it, and did a hot re-start with no problems.... I am really impressed so far!