mounting it from the front spar is fine, but mounting it from the rear spar has the added benefit of pitching the nose down a little to give you better visibility.
>>>>> Mounting the speed brake further fwd has advantages: = more space for a longer brake. = wee bit more height on a tail dragger = thicker wing to work with. If these are of any value, move it to the big spar. As regards changing the pitch angle - this is obviously a highly desirable effect, but it is not an aerodynamic reaction to the speed brake or where the speed brake is located. The lower nose is a consequence of increased drag - no matter where the drag source is located(flap /brake /spoiler /parachute)- even on top of the wing for that matter. A windmilling propeller has exactly the same effect (steeper glide) - we have seen a turbo Porter with the propeller in B range - now that is getting the speed brake really far forward - it comes down like an elevator. The attitude (pitch) that the aircraft asumes in the glide (or mapproach) is a function of maintaining the speed you require under a particular power /drag configuration. If you add drag (and do not add power to compensate) the bird will slow up unless you add something else to keep it moving at the required speed - i.e. lower the nose for a steeper down hill ride. I am very aware of this (on appraoch) when deciding when to push the propellers through to full fine - the VSI shows the extra drag immediately and the nose needs to be lowered to stay north of the blue line. The propellers are well fwd of the front spar. ___________________________________________________________ALL-NEW Yahoo! Messenger - sooooo many all-new ways to express yourself http://uk.messenger.yahoo.com
