dear friends
just bought a lot of used engines and along came this Thor 29 that looks new
i started modelling in 86 so i have no clue on how to run this baby
no idea on instalation, batteries, if runs on gas or what....
and if needs some other thing besides the engine to work properly (ignition maybe?)

nobody around have knowleadge here to tell me more about
advice will be much appreciated!

Hey Fred:

They're ultra-cheap engines, with the piston running in the aluminum cylinder, no sleeve.  Few got them working back in the day -- the joke was that they got broken in and worn out on the same flight.

I've always had a dream, on my long list of model aviation dreams (and my short list is too long for my remaining lifespan, BTW), to get one and rebuild it to decent quality standards -- basically machine it to decent tolerances and put in a sleeve -- then go fly.

They, and the ones like them, were known as slag engines back in the day.

It looks complete, though.

Had a couple of AHC/Winton Bros slag contributions to the modelling world. The wiper points were useless and about 6 volts would get you a sputtering run. we used to replace the spark plug and use a 50/50 mix of gas and oil. With a glow plug permanently fired with 2 -1.5 V pen cell batteries in parallel it would run on a good day about 5,500 to 6,100  wide open after a really laborious break in and that was probably better than it could do with spark ignition but like the others say it isn't long for the world.
 

I have a Rodgers 29, BTW, bought off eBay in a moment of weakness.  It's run out a port-prime in my hands, with a glow plug, and that's about it.

thanks a lot for the reply and all valuable information
so sad that this one is such a poor performance engine....
i was dreaming of a vintage model for it, bit if itīs so hard to work properly and wears so fast, i see no better use then someoneīs display
all the best from Brazil!

OTOH, if someone starts complaining about all the cheap stuff sold today and says the key words "they don't make 'em like they used to" you can pull it out and give them a tour of it's main features.

That small Merco looks interesting. It looks like a small version of the Merco Rustler/40 that came out in 2002. Same needle valve and muffler system as the .40
Ed

I have the 51 and it looks much the same.

It doesn't look like a .60 in that picture. More like a .19 The shape of the head fooled me.
Ed