She won't Slow Down & Flap-Down/Nose-Up

[Igor4U]

The below Post noted how aerodynamically clean the Sabre is. I also noted that the F-86 doesn't want to slow down (on final) to land. Even with Speedbrake deployed and Gear & Flaps down (with Throttles at Idle), she just doesn't like giving up her Knots. Now I know this is 2nd generation Jet Engine Technology, but I would have thought with everything hanging and Idle Thrust, the aircraft would start sinking like a rock or bleeding off airspeed like a banshee (or both).

 

The danger with early jet turbine engines was spool up time. A pilot could get caught with throttle aft trying to bleed off airspeed, mis-judge his need for adding power to catch his target approach speed, and end up dangerously slow while the engine slowly spools back up. I'm very impressed with this F-86's throttle response. It's much more responsive than I would have guessed. Again - be nice to hear from some real F-86 veterans to authenticate the performance,

 

But again - seems the Sabre is very Slick (low-drag) through out it's flight envelope. A little slippery on Final.

 

realistic drag? Or gaining too much lift?

http://forums.eagle.ru/showthread.php?t=127538

 

"I am experiencing the F-86 having sort of almost none drag at upper speeds. If you cut off throttle down to idle you can glide enormous distances."

 

"The F-86 is a clean plane with a relatively high aspect ratio wing (compared to modern fighters). It shouldn't be all that draggy."

 

As noted in the below Thread, Flap deployment does result in Pitch Up and possible change in the relationship between center of lift and center of gravity. It does take forward stick pressure to lower the nose and the Nose-Down Trim to stabilize the Aircraft.

 

Maybe I should delay lowering the flaps until I am well under 200KIAS and closer to final approach speeds (I've been using 140 KIAS for Final) to lessen the aerodynamic forces involved. Also - maybe with an empty Gun, the CG shifts aft enough to exagerate the flap down pitch up. Need some forward Ballast ?

 

Sabre flaps

http://forums.eagle.ru/showthread.php?t=127873

 

"DCS Sabre becoming tail heavy after lower flaps..."

 

"I've also noticed that the Sabre is extremely tail heavy with flaps down."

[effte]

I think the limitations section of the flight manual would provide an enlightening read. ;)

 

Edit: You do not want to miss this post.

Edited September 9, 2014 by effte

[Igor4U]

effte - Thanx for the helpful Links !

 

I'll study Up !

[Soulres]

Ide just crab it all the way down to the end of the runway,takes practice but works on everything.

[johnv2pt0]

Make sure you slow down before you go down. It's very easy to start a descent while slowing down and this will keep you from killing that airspeed. Most airplanes I've flown do not like to slow down while going down. You really don't want to try slipping the airplane as it's not a straight wing design. Plan ahead for your slowdown / descent or use S turns to bleed off energy.

 

It is a speedy little airplane!

[Igor4U]

Good Stuff !

 

Great Links from effte

 

Great Advice from johnv2pt0

 

 

Side-note: I've heard it said that the F-16 owes its existence to the F-86. The Generals who championed the concept of the (single seat - single engine) F-16 were the Lieutenants and Captains who cut their teeth on the F-86. That sports-car mentality continued the lineage of the sleek little (single seat single engine) fighter. The F-16 reversed the trend of bigger heavier more complex multi-engine multi-crew fighters. Thank you SabreJet !

[will-]

I would post a track.

 

I made the simple mistake of thinking I was deploying my air brakes but not 100% deploying them. You have to hold "B" to fully deploy them. Or what key you have mapped, if changed.

[Soulres]

I would post a track.

 

I made the simple mistake of thinking I was deploying my air brakes but not 100% deploying them. You have to hold "B" to fully deploy them. Or what key you have mapped, if changed.

I found that While for me *mapped to joystick buttons* the Airbrakes were Toggleable, BUT i had to hold the button for afew seconds for them to start opening as if they were charging. idk if that has to do with hydraulics or what

[Zabuzard]

The airbrakes are operated by a 3-way switch on the throttle: Extend - Hold - Retract. They do the told action as long as the switch stays there. Manual states you should keep the switch in Hold position if not in usage or problems with utility hydraulic could occure. In DCS atm you can only operate Extend and Retract position but the problems are not modelled.

 

The switch operates the same way the Flaps handle and the Canopy switch does (dont leave that two in Retract or Extend too!) so yeah you must hold down airbrake keys until fully retracted or extended.

 

The Airbrakes need about 1-3 seconds until fully extended or retracted depending on airspeed, altitude, g-load etc.

Edited September 12, 2014 by Zabuza

[Oesau]

And you should also follow the pattern entry with the overhead break to bleed energy when entering downwind - but yeah, air brakes need to be fully deployed (and anticipate the nose up with the brakes, flaps, and gear)

[CoBlue]

So what about the need for very little engine thrust, when landing, with full flaps & gear down?

The traffic pattern is supposed to be flown at or above 63% rpm?