Thanks for the info Mart and your confirmation of it too Tug - (Ah! would I be right in thinking you're a 'Wilson' too!)
I have enough of the SP113 to finish the hydro but will look into getting this 206 for the next (???
Now Mart have patience here as it's 'back on the engine bit' -
Following on from float chambers I'm afraid I don't have room for a float chamber - definitely don't - (unless I kick the radio out that is which means too much pulling about at this stage. Of course if there isn't enough capacity for a reasonable run that may have to happen at a later date!) I have bought a couple off ebay so now have a good idea what they look like and how they function but there's ''no room at the inn' on this build at present.
that, unlike the float chamber, it will mean the fuel is under pressure 'at the venturi' but it should act as a kind of 'compensator' and keep the head of fuel fairly consistent. I'm thinking that by venting it when filling then closing the vent it will continue to fill as the fuel is drawn off. The slight vacuum in the head of the tank may
help keep the head of fuel above the level of the fill pipe and if it works as I think
it might then when the engine is throttled back and the pressure reduced then it may act with a semi uniflow action. Another suck it and see event - any opinions?
Forgive the sketch - done in best pre CAD fashion I'm afraid!
Feed in from the tank on the left, fuel pick up in centre, vent on the right. The cup is the sump (to be glued in with JB Weld).
Ready to fit
I have also made a similar but much small chamber to act as a back pressure overflow from the exhaust to fit 'tween exhaust pressure outlet and vent on first tank.
Couple of pics of the wing and fins.
The whole unit is held on with 4mm nylon bolts in aid of 'breakoffability' (bet Windows hasn't got that one!). The wing pivots on them too - just need to work out a method of adjusting the wing incidence that will hold it rigidly but can break apart as well. The struts are made from 2.5 ally welding rod, the ends squashed in a vice and drilled. I don't expect these to survive a tumble but they are man enough to keep the whole thing rigid.
That's all for now, glad you are inspired Baz, break out that ply - it would be really great to hear of another one being built.
Things are looking like it's a few days back on the Huntsman again, but in the meantime let me know what you think on the fuel set up.
Regards - Ramon