2nd test flight Gee Bee with Seidel radial ST 770

[Macsgrafs]

is this glow fuel or petrol?

[HansThunderbolt]

@Macsgrafs

This engine runs on glow fuel (5,5% oil + 94,5% methanol)

[30inventionman]

@Macsgrafs petrol

[jamesjohnoneill]

Hi Hans,

did you need to run a pump, or at least tank pressure, on your engine? Mine will not sustain a nose-up run without tank pressure and even then only just. I'm thinking that I may need to go down a pump, or maybe a pressurised tank and a cline regulator, to get it to run ok.

thanks,

James

[HansThunderbolt]

@jamesjohnoneill

I do not need a pump or pressurised tank. Engine keeps running steady in vertical climbs. But I did use the recommended fuel line diameter (big!) and distance tank to carburator (+/- 7 cm / 3 ").

Normally there is absolutely no need for a pressurised tank with this engine (from what I hear from other users)

[jamesjohnoneill]

Excellent!

What size fuel tank are you using, and how long does it last (with typical flying)?

thanks,

James

[HansThunderbolt]

@jamesjohnoneill ; I'm using a 750 ml fuel tank. A 10 minutes flight will take about 350 to 450 ml

[jamesjohnoneill]

hi,

is this running with the rear mounted collector ring?

sounds great!

[HansThunderbolt]

@jamesjohnoneill

yes this is with the rear mounted collector. See my other video's for an engine run on the test bench also with this collector. I think the sound is much better then without the collector (more "deep" / more realistic) but I lost about 500 rpm from max rpm!