Moderator: Mike Everman
Eric wrote:Well youve managed to add an extra 17" of welding, and numerous hours cursing and forming cone sections to one of the most simple engine designs in the world :P
I think it would make a very nice looking contraption if it could be machined from a solid piece of round stock or spun from tube, but in practice I think lining up all those conical sections, and then welding them, would probably make it look like the FWE's ugly cousin.
Beauty aside, it looks good.
Larry Cottrill wrote:Anyway, this is a lot of cones to put into an FWE planform, but I hope the performance will be worth it.
milisavljevic wrote:Hello Larry --
This is just my evil idea, but why not ask Mike to kazoo the main body of your 'Lady Anne' and ship it out to you?
He can place it in the same box as your Dynajet. Think of this service as rent for keeping the Dynajet for so long!
Mike Everman wrote:I expect Larry is doing UFLOW on it.
I'd like to suggest a move of the second pinch to a new place for comparison to what you've got. To whit:
the 42mm diameter moving left to 45% of the acoustic length, and the 32mm pinch after it to 55%. Otherwise, I think you guys nailed the throat location.
I'd have put the center of the intake ellipse at 15%, but I'd like to try that on a test duct to be sure...
The attached pic traces out the peaks and troughs that arise from harmonic sums in a closed end duct. The intake location can be input, and I'm not considering that at the moment, other than setting it to Larry's favorite spot!
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