RCU Forums - HANGAR 9 meridian 10cc

Hi all.

i have acquired a hangar 9 meridian , complete with 10cc evolution petrol motor. Both appear in good condition , with the motor having roughly 15 flights of 10 mins or so on it.

this is my first petrol motor , as I wanted to stear away from methanol , as I have been having quite a few dead sticks , and lost a very nice plane due to a low down dead stick , and poor judgement. I see all these guys at the field with reliable petrol engines , so sold all my methanol motors and have been heading towards petrol. Hence buying this.

The first problem I am having is tuning. This little motor seams to be more hard work to keep running properly than any of my methanol motors ever where.

I got got the engine running sweet on the ground , perfect transition , perfect top end holds the top RPM with no sag , or cutting out.....great idle.

First take off get up off the ground and boom , dead stick. So I landed her , luckily not to break anything and away I go to fiddle with it.

long story short , it would appear that I have to have the engine quite noticeably rich on the ground , to ensure it doesn't dead stick on take off , and sometimes I am getting also dead sticks when bringing back to idle on landing.....it to me....seams quite unreliable......although runs pretty good in the air.

i am also running all the proper gear fuel tubing etc etc supplied by evolution....and the correct clunk.

even when in the air , this model seams very underpowered. This motor has the same power output of a OS46AX , and I am running it with a 12x7 prop , it just doesn't seam to have much power.....I'm flying at full throttle most of the time. It will pull vertical but it needs a bit of a run up so to speak.

it just seams to be really tempremental.......I was hoping to have a "set n forget" motor , like I see with other guys larger petrol engines........so far it's been giving me more grief that nitro , so much so I feel like every time I take off , it could result in a possible dead stick.

i am new to tuning of motors I must admit , so any help or advice how to do it properly ( I got a small tacho ordered ) would be appreciated , as my attempt at what I thorght was perfect tune , is obversly wrong.

also , would it effect it if the motor is undersized for this model? It just seams sluggish and flying so much of the time " on the motor " , and does this mean I will have to run her a lot richer on the ground? The aircraft and the motor have been matched by manufacturer as being a good match , yet I can't help but think the 15cc one would have been a better match with power there as spare.

any help would be appreciated, I'm also running 91 octane fuel with a 20:1 2 stroke mineral oil as base......lots of black soot coming from the exhaust!

cheers guys
Craig.