No Ailerons??? Beech Jet 400...???

M

MusketeerMan

Well-Known Member
This is new to me! I didn't know some jets (Beech Jet 400 and others) do not have ailerons. Apparently they use the slats to decrease lift on one wing...and are suppose to use rudder to turn at low speeds...just doesn't seem right.

Any other companies use this design??
 
I'm thinking you mean spoilerons (not to be confused with flaperons, like the F16 has). The MU2 might be the classic example of this sort of aircraft control.
 
MU-2
A300
F-14
B-52

All use spoilers for their main roll controll.



Most every airliner uses spoilers for extra roll controll beyond what their ailerons can provide durring slow flight.
 
I'm not that familiar with the flight controls of the Beechjet, but I know that it's grand-uncle (The MU-2) doesn't have any ailerons. Spoilers, instead, are used for roll.
 
yep its true. I flew the T1 (same as Beech400) and it uses spoilers for roll. The USAF liked how handled like much larger, heavier a/c that students would be flying later. At low speeds the spoilers are still responsive enough to "pickup" a wing however using rudder deflection also greatly aides handling. To tell you the truth, besides the plane feeling a little bit heavy, it wasnt a bad handling aircraft.
 
I swear there are small ailerons on the Beechjet. At least thats what all 50 or so looked like that I saw this summer.
 
what you are referring to are the roll trim tabs. Its easy to mistake them for ailerons..they look just like them.
 
Not just the 400...nothing in the Beechjet line - from the Diamond 1 to the "Hawker" 400XP - none of them have ailerons. What you saw were the trim tabs as stated above.
 
Jason said:
Yes that is correct.

Jason

PS - I think you need to measure again - they're not 2 feet long.
Click to expand...

Eh it was just a rough guess for being at home and only seeing them as I was pulling bags or fueling. They are definitely more than a foot. I always though they looked too small to be ailerons but didn't think much of it. Ya learn something new every day.

They do however seem really big to be trim tabs. But then again I'm not an engineer.....yet.
 
BobDDuck said:
I'm thinking you mean spoilerons (not to be confused with flaperons, like the F16 has). The MU2 might be the classic example of this sort of aircraft control.
Click to expand...

ya sure flaperons are used on the F16? I believe flaperons are used on F18
 
USMCmech said:
MU-2
A300
F-14
B-52

All use spoilers for their main roll controll.
Click to expand...

The P-61 Black Widow night fighter in WWII had full span spoilers for roll. Interestingly enough, it was the fastest rolling fighter as tested and certified by Wright-Pat of any WWII fighter Allied or Axis.

Want an eyeopener? From level flight in a 737 or DC-9 extend your speedbrakes about halfway. Then roll the airplane to 45 degrees AOB. The down wing spoilers drop and the top wing spoilers extend. You get a surprisingly quick roll rate from a big airplane.

Don't try it with passengers aboard.
 
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