Hawker 800XP Stick Shaker test in Flight
 

Hi everyone,
I am interested on knowing if anyone has ever done a flight test on the Hawker 800 series after a 48 Months maintenance inspection which includes a stick shaker test in flight. Has anyone ever encounter any adverse flight conditions while doing the same Stick Shaker test on any other Jet?
Thanks.

You are talking about the test anytime the leading edges are removed?
I've done quite a few on both 800's and 700's and 1A's.
Follow the maintenance manual to the letter. Do NOT do like Ratheon and lead up to this test with A/P on and check that it pops off when stick shaker activates.
The successfull parameters of this test are fairly vague, If you end up right side up it seems they consider it OK.
Make sure there is no ice on the leading edge (avoid clouds, day,VFR) allow no one in the back, and it wouldn't hurt to make sure the toilet is empty.
After all these cautions, MOST of these were pretty benign.
We only had one 700 that would roll 90 degrees + to the right every time,
got your full attention the first time, then you knew what to expect.
Dave

Now, by no means do I have any jet experience (CRJ simulator course is all I've done), but are hawker's THAT bad? Considering that going to the shaker isn't the full stall, the 90 degree wing drop sounds like you guys take it farther than the shaker. So, for clarification, once you get to the shaker on a hawker, there's a dramatic wing drop? If that's the case, shouldn't the shaker be set to activate a few knots faster, so you have warning before the wing stalls? Thanks for the info.

What they are actually looking for is a stall. They want to see if having the leading edge off changes that margin between shaker and stall. Lear 25 in the hangar next to us hit a bird and needed a new leading edge. Lear brought their own pilots in to test fly, they said that one was real exciting.
Dave

Performed these tests last summer, really a non-event if your properly prepared. There's a graph in the AFM that will chart when the stall warning and identification are suppose to activate. Also there are procedures. Just review the material and follow the book. It's actually kinda hard to stall this aircraft, but it can be done.

Very interesting. So you fly (and stall) the plane with the leading edge removed? Anyone have any pics?

NO,NO,NO. After the leading edge has been off and has been put back on.
I hope you're kidding.:)

Pretty much all swept wing a/c have nasty stall habits.....hence the stick shakers, pushers, etc.

Makes much more sense... Unfortunately I wasn't kidding, but I did have a few drinks and was ready to believe anything! :cool:

Still interesting that the stall changes much with the same leading edge design. Learn something new everyday, I tell ya!

When you take the leading edge off a plane and later re-install it, just a few hundredths of an inch difference in alignment could make an aerodynamic stall go from predictably benign to a complete roller-coaster ride.