Hi Chris
I am using a 6 oz plastic clunk
First flights needed 5 ounces
after some more flying this is
reducing by 1/2 oz or so
4 oz too small to start with
why not use full 6 oz on early
trimming flights and use less
as the motor breaks in fully?
See you

Vincent

I was talking with Windy about a month ago about what size tank to use.  I have a Large James Hemi, and the nose is a *little* cramped on a new plane underconstuction.  He told me the he used 5 1/2 oz. to 6 oz. in his planes when he was flying the BJM set ups at the NATS.  I will put a 6 oz. tank in mine to start with.   5% nitro all the way.............

Hi Guys,

I need a ball park capacity figure for a tank for an ST60.

I expect to be running it on 25% castor and 5% nitro or so, and I need it to run for around 7 mins (F2B).

I'm guessing 4 oz (120 cc or so), but I'd rather overrun on the first flight than quit in the overheads.

Chris

HI Chris

The majority of the ones I have seen and flown  used 6 ounces for a pattern. Unless you run them very very rich or use very high nitro , or  someone have reworked the baffle on top of the piston, 6 ounces will normally work fine

Randy