性能：3.7hp @ 8500rpm
After receiving the engine I put it on the test stand right away. Ignition unit started misfiring on one cilinder after about 45 minutes of break-in.
Filed an RMA on the 7/22/2015. Hobbyking promptly requested a video of the malfunction, so I made a youtube video, in which you can clearly hear the engine dropping out and picking up again on one cilinder. We are now october 8 2015, and I am still waiting on "initial evaluation". I guess this means hobbyking will just ignore me and will not warranty a defective product.I received my 30cc twin in todays UPS delivery, and mounted the engine on my test stand for it's first start. I found (like any new, tight engine) it wanted more gas than I expected, and wound up with a low needle of 1 and 3/4 out with a high needle close to 3 turns out (nice and rich mixture). The one thing I did experience was on the second tank I lost a cylinder. After some diagnosis I found that the old nickle metal 6 volt pack had fell below 5 volts. I charged the pack and got both cylinders back right away. It appears that this ignition module because of firing two plugs draws a bit of current from the battery pack. I have since replaced the pack with one of my 2500MAH two cell A123 Life batts. I have not flown the engine yet (in my 1/4 scale Flair Fokker Dr1), but I like the engine just fine.did not get it yet... waiting in hurry... I hope I am not in a mistake...I am going to use in a 1/4 piper cub