Adam

[Woodstock]

hmm, doesn't answer my question..

[Andy_B]

So putting nice fairings and covers on servos and linkages is just a waste of time then ...just point it down hill a bit more .....simples

[Gonesoaring2003]

Gonesoaring2003 said:

I'll have to look what size they are tomorrow, the span is 2.6m and the brakes were already fitted as part of the kit – unusual for Multiplex to get it wrong?I'm sure the brakes are fully extending – the actuating arms are reaching vertical.

Ok, Having flown the Pike this morning at the same place and having no problems landing with Crow brakes, i am convinced the airbrakes on the Pilatus are on the small side, I measured them – 240mm long and extend out the wing by 25mm. I will mix in some down ele comp and see if that helps then may put aileron spoilers on a different switch, and try Simon's sideslipping method. Thanks for all the help!Alex PS I think in their own way both Chris and Phil are right,  airbrakes cause drag which allow you to steepen the approach without increasing speed.

[Gonesoaring2003]

And apologies for the massive thread drift!!!

[Phil.Taylor]

Woodstock said:

hmm, doesn't answer my question..

LOL – so you havent done the maths yet then? FWIW – full size glider "airbrakes" were originally designed as "speed limiting airbrakes" (1930s) – so that even in a steep dive you couldnt exceed the max design speed & hence destroy the plane – without the brakes, it can go faster, until something breaks. Does that answer your question?Andy – yep – till the ground comes up & grabs itAlex – if you are landing on the front of "Watership" – thats a tight space! – have you tried walking back up & landing behind the gallops? (where my mate used to land his big Ash26) Re. thread drift – dont think Adam has noticed yet – and I'm sure Bobbyr will be along soon with the setup for your Speedo Phil.

[Gonesoaring2003]

Phil.Taylor said:

Alex – if you are landing on the front of "Watership" – thats a tight space! – have you tried going back up & landing behind the gallops? (where my mate used to land his big Ash26) Re. thread drift – dont think Adam has noticed yet – and I'm sure Bobbyr will be along soon with the setup for your Speedo

Phil.Yep, had thought about going behind the gallops just didn't fancy climbing over fences or through gates whilst flying.Speedo is all set up – have now removed all reference to anything that makes both ailerons move down!

 Alex

[isoaritfirst]

My Pilatus only has pop up air brakes as well and it takes some stopping. I tend to hold as much up in as i can without stalling and let it settle down.  rephrase that -- "settle" just does seem the right word.Too much up and it becomes very unsettled, and could easily get rolled over,not enough and it fails to settle  when it touches down. Whoops wrong word again, "touches" hardley fits the bill.. But it is big and it is heavy, what it needs is a nice flat bowling green grass to grease along on.

[slope_dragon_x]

Maybe we should rename this the "B4" thread, or should that be after?I think that part of the problem of landing the B4 on spoilers is due to the lack of dihedral, as well as the need for elevator compensation. In combination these seem to reduce lateral stability.  My Mibo and Rosenthal Swifts are also a little "wobbly" landing with spoilers, whereas my old Discus 2, which had more dihedral seemed ever so stable.I've cheated on my latest B4 by having flaps fitted.  They are non-scale, but not many would notice and they transform the versatility.  I drop the flaps slightly (not as much as crow) at the same time as raising the spoilers and everything seems to happen tickity boo with very little elevator compensation being required.  The same arrangement on my Lunak also seems to work well.

[Bobbyr]

Speedo Brakes, are                50% of travel up on both Ailerons, and use 30% compensasion on the Elevator , you will be able to come in so slow it will shock you , and it will come in still very responsive,    Oh and your Elevator compensasion is down not up , so as to make the nose come down , Try it at height, But it should be close .           Bob

[Woodstock]

That's the way to do eeeet! Flaps down and spoilers up needs zero compensation on the Inteco.

[Bobbyr]

If you try it on the Speedo , the Spoilers cause a very tight loop , So you do need compensation , but i would imagine there is a point where the Spoilers dont work if they are not disturbing the Air enough .    I just know that i can come through a nightmare Rotor and still control a crash/arrival              Bob

[Gonesoaring2003]

Bobbyr said:

Speedo Brakes, are                50% of travel up on both Ailerons, and use 30% compensasion on the Elevator , you will be able to come in so slow it will shock you , and it will come in still very responsive,    Oh and your Elevator compensasion is down not up , so as to make the nose come down , Try it at height, But it should be close .           Bob

Thanks Bob,Will check my settings are somewhere near yours.

[Adam Richardson]

intrresting. I set my speedo with full up ailerons for spoilers (around 50degree) and a little UP elevator comp.

[Gonesoaring2003]

Adam Richardson said:

intrresting. I set my speedo with full up ailerons for spoilers (around 50degree) and a little UP elevator comp.

Thats pretty much what I'd done as thats what I do on my Banana, will play around and see what works best - as ever its prob personal preference