Today I tried out a new Cermark Bobcat I had NIB for a while. My first inverted engine. I have read that it might be easier to start it with the plane inverted. So, I flip it and start to fill the tank. Doh! Fuel floods out of the muffler all over my flight box and panels. Engine full of fuel. Pull glow plug and drain engine, flip and spray fuel out of carb like a whale. Turn plane over, fill tank. Flip plane. Try to start. Engine hydro-locks in a second. Repeat engine draining, spraying fiasco about 4 times. Burn huge ugly ring out of fuel slippery spinner, curse under breath and remove (I'm at an Elementary school playground and lots of kids are real interested.) Say forget it and start engine with plane upright. No hassle at all, except reaching between a nose wheel and a prop for the glow starter is not a comfortable idea.
Broke in engine, flew plane, and find the little TT 42 has an amazing amount of guts. A soccer field is really small for a glow plane. Really, really small. It did make the plane seem ungodly fast, though.
Note to self: Vert. stab goes up- who cares which way engine points.
Oh, and a kid said you could hear the plane way up in the front of the neighborhood as it flew, (he said, "...especially when you looped and stuff!") I thought it was quiet, but it drew kids and families like a Pied Piper. I expected the cops, and decided one flight was enough. Of course, if people allow those gosh-awful leaf blowers how on earth could this tiny little noise bother them??

I'm sure I am preaching to the choir, but it sounds like your fuel tank is considerably higher than the carb spraybar. I had the reverse problem in a Mustang, and could only start it upside down. BTW, how does that Bobcat fly? I am considering one for a second airplane for my kid.

put a great planes easy fueler valve on it and it wont flood untill you unplug the fuel line. so just get it ready to start and remove then start,(fast) or you can get a regulator and solve the problem of flooding altogether.or you can lower your fuel tank, whichever is easyier!

I only flew it once in an awful tight area, I'll let you know after this weekend when I fly it a decent amount. It seemed easy to fly, nicely responsive and aerobatic. It did seem pretty fast, but - again-I was flying in a pretty small area. I'll wring it out this weekend, weather (and wife) permitting.
I will check on the fuel tank, (it was all pre-installed and RTF).

If you don't mind me chiming in here, I'd say the Bobcat is a very nice flying airplane (been flying mine for a couple of years now ) I originally flew it w/ the inverted TT.42GP and it handled well. It reminds me of a 60's era pattern ship. Once you learn the peculiarities of starting inverted engines, it doesn't really make much difference which way they're mounted, aye?
I now have an Evo .46 in mine, and we radared it at just over a hundred m.p.h. I'd estimate w/ the TT .42 she's good for around 75-80 maybe? I found an APC 10x6 made a noticeable difference in perf. over the supplied MAS prop.
The constant chord wing is very forgiving and it has a nice, mild stall characteristic. All in all, I think it's a good value...

Thanks Proptop.
How well did your cowl stand up? It seems kinda flimsy. I was thinking of putting ca soaked masking tape inside over the mounting holes or maybe using some kind of rubber standoffs for the cowl screws. Have you had any trouble with yours?
I guess because my model was hit in shipping, the cowl and the cockpit liner were both slightly cracked. I glued them with ca, they seem fine, but they are pretty thin. The only other cowl I've had was fiberglass on a Tequila Sunrise.

I run inverted engines all the time but you must lower the tanks. We have a guy who has had that bobcat for 5 years. It originally started out with the engine inverted but after countless deadsticks and trouble starting, he turn the engine up right and has been fine ever since.

The cowl is pretty thin...it looks like a clear plastic sprayed black? I scuffed the inside w/ 100 grit and layed in some patches of 2 oz. glass cloth in the stress prone areas. I also pinned the firewall, and glassed the wing center section, 'cuz I know how I fly! (I like to pull G's )
Mine was damaged in transit too, but just the balsa (cracked a little ) in the cockpit area.

I haven't had any issues with the tank location though, just had to do a little more adjusting of the carbs low end. The engines I've had in it have required a finer tuning (more delicate adjustment ) of the low end to get a good idle and transition than they typically needed in an upright installation.

Well, I flew the Bobcat again today, several times. I had put the battery under the fuel tank to get it as far forward as possible, and that raised the tank enough to be fine with the plane inverted (to start it). Unfortunately, it was too high to sit upright without fuel dripping from the carb at idle. I moved the battery to over the tank, that works fine. I just start it with the plane upright. The plane flies very nice. It is like an old pattern plane, easy to fly real smooth and does nice aerobatics. Does a pretty wicked snap-roll. Glides real nice (I deadsticked several times while working out the fuel problem.) Lands easier than a trainer. Smooth and doesn't try to balloon on you with every gust.
Nice. Looks real good in the air and on the ground, too. Makes you look good, too- the way it is so smooth. Knife edge was pretty, inverted took zero stick. Darn TT 42 is so quiet I couldn't hear it over the other planes, even on low passes. Quietest glow I've flown. Quieter than my trainer was with a MDS 40. It would be a great second plane. I had an Easy Sport as my second, (also nice- especially now that they are monocoat), but this is a lot smoother.