Guys,
I'm working on a new ship that will have twin booms and want to have all the push rods enclosed. To do this I was thinking about running the push rods up the inside boom. I read that the bellcrank position is not important and it is the location of the leadouts that count. To that end I was thinking about mounting the bellcrank in the inboard wing in line with the inside boom. The leadouts would be in the normal position. Anyone have any experience with this type of bellcrank installation?
Best, DennisT
Dennis, in a twin boom design like a P38 Lightening you will always have a centre section on the trailing edge, and an inboard and an outboard thus having three discreet trailing 'edges.'
Now, in your design do all three trailing edges need control supplied to them?
For example, if you only need control supplied to the centre edge then supplying the drive from either boom will make no difference if the centre flap is really stiff - and this should be very easily accomplished as this is the thickest part of the wing and should support a very thick flap.
Of course if the control is needed equally for in and outboard edges then the above is sage advice.
But when viewed horizontally the lead-outs 'within' any wing should point directly from the lines that enter the wing in order to avoid wear and drag on the guides.
When viewed vertically it seems that you only need an attachment point of mechanical strength and an outboard boom in my opinion would be a stronger place than an inboard one, and of course a better place to place the weight.
Cheers.