If my comment a couple minutes ago looks like a repost, an earlier post today said that it didn't go through.
MLS On Wed, May 17, 2023, 8:53 PM Michael Stockhill <sto...@gmail.com> wrote: > I had difficulty with the spoilers about 18 years ago. My recollection is > that I identified the interference points and dressed the trailing edge of > the spoilers with a file after trying some paraffin.They were binding and > it took a hard yank to pop them open. Both are apparently warped or > distorted. The trailing edge of both is now flush with the wing skin > outboard and a few mm below grade at the inboard ends. I wonder if air > loads--positive flex or deflection of the wings in flight--might contribute > to the binding. > > > Michael Stockhill > Polson, MT > > On Wed, May 17, 2023, 8:25 PM Kristin Nowell <kristinnow...@gmail.com> > wrote: > >> thanks ian, that is quite generous. I'll keep trying, let you know where >> I end up. >> I hear you Rob, and because you shared the fear. I check airbrake >> function as per your instructions after every assembly, and do a slightly >> less complete check ( Kristin at controls, I hold brake shut, call and >> respond. Kristin then pulls full brake, I feel around the perimeter, then >> grab the brake and hold tight while Kristin moves lever and calls >> "resistance". I release, she closes, and I verify full closure) before each >> flight. >> I went to fuel up one frosty morning and the airbrakes had frozen shut - >> very disturbing sensation to pull the handle and get no movement at all !!! >> Any opinion Nigel ? Thickness of airbrake ? Adjust turnbuckle for more >> closure tension on cable ? If I recall correctly, the adjustment turnbuckle >> is right there behind the keel inspection panel at the copilot left hip. >> Any specs for the airbrake/box closure spring ? >> >> Cheers >> >> On Sun, May 14, 2023 at 6:17 PM Rob Thompson <amessageto...@gmail.com> >> wrote: >> >>> *Question:* When you push the raised section down, does it go correctly >>> into position? I once fixed a similar problem but it was caused by an >>> improper fit underneath the spoiler stopping it going all the way down. >>> >>> *WARNING!!! *The spoilers can jam *VERY* easily after an adjustment and >>> you will only find out about it when the air is flowing over them, most >>> likely when you are on finals which happened to me and I got some >>> sideslipping practice. >>> To test them, get one, preferably two people to spread their fingertips >>> along the top of each spoiler and use friction to push the spoiler >>> backwards and lightly downwards. Effectively simulating the airflow. If the >>> fit is incorrect they will jam! The reason for this is that in the very >>> first bit of normal movement of the spoiler is backwards not just upwards. >>> It is a good idea to check this at least at every annual inspection. >>> >>> Rob >>> >>> Rob Thompson >>> 0429 493 828 >>> >>> >>> >>> On Mon, May 15, 2023 at 3:33 AM Tom Preisser <t...@ecoflight.com> wrote: >>> >>>> I have a slightly warped airbrake which sits properly throughout 85% of >>>> its span, but then proud of the surface for the outboard 15%. >>>> Only five mm high at the very end, but it bothers me. Three fixes come >>>> to mind - >>>> I could grind it thinner, bringing it down to the surface of the wing. >>>> I could mount another closure spring at that end. Even a little closure >>>> force is sufficient. >>>> I could weight it into form as it sits in the hot sun this summer, >>>> maybe even paint a black topcoat, and see what it gets (?). >>>> >>>> Two questions; >>>> Does anyone have a better idea ? >>>> Has anyone replaced their closure springs ? I did on both wings, and it >>>> isn't perfect - the common springs from the hardware store are close to >>>> yield when airbrake is fully open, and don't provide much closure force >>>> when airbrake is shut, i.e. if I flip a wing upper surface down the >>>> airbrake will hang open just a little. Perhaps >>>> the much more powerful airbrake closure spring isn't adjusted properly >>>> to compensate for wear at the junction of the ball and pin drive on the >>>> wings and the torque drive tube slots in the airbrake drive tube in the >>>> wing root. >>>> Any and all thoughts would be much appreciated. >>>> >>>> >>>> >>>>
