Ok all on the "shelf" we have a ASP 91, TS 91 (tiger shark) and Super tiger 90. The ASP and TS have diesel heads by A J Coholic and the Super Tiger Davis head. All bench run, and they are ringed engines
I really do not have any planes big enough to take any. The ASP and TS are really well made and on inspection before running no junk inside, think we ran a 16x8 do not recall revs all on DDD fuel
r/c carbs all standard mufflers

If any interest in any- PM me martin

I did have an interesting event when running one of them my test mount was mounted on folding workstand, I was standing behind the stand and it lurched forward and almost went over, cut the throttle, put a 2 ft piece of of I beam to weight it down and it stayed put.
did not expect that much thrust, largest engines before up to 50 size and it stayed put martin

chicken stick used to flip no way a bare finger

Hah! I can relate to the folding test stand going for walkies.

Twice now I have had a PAW 40 drag my portable folding work stand across the polished concrete garage floor - normally wouldn't be an issue if I kept an eye on it but the first time it happened I turned my back on it for a few seconds only to have it 'chase' me.

When the same stand is placed on grass it does indeed want to flip over and resting my foot on the rear of it pins it nicely.

Cheers.

they seem to be bulldozers with props rather than tracks no thrust issues here ha ha martin

my chunk of I beam is about 35Lbs stand stays put I first used a large very heavy tool box
nearest thing I had but got covered with oil

I have a Supertigre .91 and a DDD head for it, but I haven't tried running it yet. That is my largest model diesel engine that I could run or use at this time.
I think the .40 and larger up in size diesel engines tend to get easier and easier to flip start. It is probably something to do with all the ether in the fuel.

I have pondered its more to do with the percentage volume compression loss compared to the percentage volume compression trapped - the cubic capacity rises at an exponential rate where as the circumference of piston (or any other potential leakage area) doesn't.

In other words a larger capacity engine has less leakage area when expressed as a percentage comparison.

Earl, I'm not sure what series mine is, it does not have a bolt on front housing.

You fellows have me out gunned by a whole bunch!

The largest diesels I've run to date were .09s, and I can't imagine a .90 stump puller on my bench! My PAW 2.5cc is still NIB, and that is the largest diesel I have ever owned.

Most powerful model engine I've ever run was an Enya .60 III al-chrome, and it drug my test bench easily. Wonder how that would have run as a diesel?

Bill