I just received my 90TS Flat Twin AAC, LL, it has single bright valve covers on each head and a single carbureter with one intake and one set of needle valves, however, the picture on the box and on the instruction manual shows individual valve covers on each rocker arm, and a dual carbureter with seperate needle valves for each cylinder and is also said to be a 90TS. Did I get the wrong book with my engine? It came from Chief A/C.

G'day What you have in the box is the latest Saito 90TS which was built to look like the engines in the original Piper Cubs and was designed particularly for mid size Cub scale models such as the Goldberg Anniversary Cub. The picture is of the earlier 90 and 100T engines.

The 90TS is a "boxer" even firing engine with a double throw crank and is a very smooth running engine. I have one in a Cub and it just purrs and does not drop cylinders.

The older 100T engine is still available and is slightly cheaper here in Australia. It is an uneven firing twin with a single throw crank but it too runs well though differently

The smaller 60T is the same style engine ast he 90TS.

The 60T will power a small Cub well and the 90TS was intended for Cubs on floats but I find it perfect in my land lubber Cub.

I flew it initially on the front of a Kadet Senior to make sure it was run in and reliable and it flew the Kadet really well too.

Enjoy. They are really nice engines.

Thanks for the info. Just got a 90 T and was thinking of running it on Kadet Senior.

Does the 90 T need a glow plug heater? How about the 100 T?

Tom

Flat opposed engines,,,,,drooooool.

They are glow engines, so yes they do need a glow plug lighter or some sort. You can simply use two ignitors or go fancy and install a dual plug onboard ignitor system.

I meant do they need an ignitor to run or just to start. Some twins can cut out 1 cylinder while running.

Tom

Just to start

G'day

I was running my 90TS today. It is in the Goldberg Anniversary Cub. I am hoping to fly it tomorrow at our club Fun Fly and I wanted to blow the cobwebs out. It ran fine as it usually does. I have flown it about 10 times now and it has never dropped a cylinder. I use two glow starters to start it then remove them. It does not need any glow assist when running. Today I only had one glow starter available, so I put it on one cylinder - started it on one cylinder then moved it to the second cylinder which immediately fired up.

I use 10% nitro, 5% castor oil, 15% Synthetic and 70% methanol and this seems to suit it well.

It is very easy to start, I usually prime it and flick it. I have set up a prime line to the prime fitting on the carby and I squirt a couple of ccs of fuel into it, turn it over a few times, apply power and flick and away it goes. I have found that it can be hard to prime it by blocking the exhaust and the direct prime to the carby works well.

It will fly your Kadet Senior well. I test flew mine in my ARF Kadet Senior. I did not fit the cowl round the engine as it was already cut for a single cylinder engine.

You will love the sound especially at idle.

Cheers

Mike in Oz

Thanks people.

Going to hang the 90 T on my Senior today. Will post pics.

Tom

Still waiting for mine to show. [&o]

Can't wait to fire it up! Mine'll be going in the nose of a Sig 1/5 Anniversary Cub [8D]