Throwing some light on rates of turn

Originally Posted by gimpy117

well it is curious that those flaps on the spit do that. You are right, they are pretty inefficient flaps, non adjustable, and they drop to a super low angle which in reality should cause a heap of drag

The Spit flaps at least optically seem correct. They were only landing flaps and there was no way to put them on an intermediate level (which was wrongly modelled in IL2 1946 ). AFAIK, for the seafires, they placed a sort of stopper to fix the flap temporarly to an intermediate level for take off from carriers. As soon as the flaps were retracted the stoppers fell off and gone the possibility to have the flaps on an intermediate level.

[Robo.]

Originally Posted by 41Sqn_Stormcrow

The Spit flaps at least optically seem correct. They were only landing flaps and there was no way to put them on an intermediate level (which was wrongly modelled in IL2 1946 ). AFAIK, for the seafires, they placed a sort of stopper to fix the flap temporarly to an intermediate level for take off from carriers. As soon as the flaps were retracted the stoppers fell off and gone the possibility to have the flaps on an intermediate level.

You are right, the issue has been reported already: http://www.il2bugtracker.com/issues/91

Just for the record, the flaps have been sorted in 1946 already in one of the later DT patches.

The spitfires using wooden wedge were normal mk.Vs starting from a carrier. Destination: Malta.

[IvanK]

An excerpt from AVIA 6/2422 "Notes on the turning performance of the Spitfire as affected by Altitude and Flaps"

The only comment I would make is that the full doc discusses the fact that only "Flap 85" (Down) is selectable so the intermediate settings and any values discussed are by estimate/calculation. The values in the table are Sustained turn performance ... without Height loss.

[Kurfürst]

Excellent! Does the report mention the turn time/radii at SL perhaps..?

[IvanK]

Unfortunately no its all 12,000ft and up.

[Kurfürst]

Ahw. :/ I wonder if its possible to convert the figures to different altitudes..?

[Robo.]

Good stuff IvanK, only thing that confuses me is the 'Merlin XX', i guess that's a typo of some sort, or was that some Mk.III testing?

Good information regarding Spitfire flaps down behaviour at page 11 of this document:

http://ntrs.nasa.gov/archive/nasa/ca...1993092582.pdf

[IvanK]

There is a Pencil Note on the first page next to the title "MKIII". This I presume is an annotation to indicate that the document is based on the spitfire MKIII which would also match the XX Merlin. A weird choice of variant to do tests with !

Got the NACA report.

[Crumpp]

An excerpt from AVIA 6/2422 "Notes on the turning performance of the Spitfire as affected by Altitude and Flaps"

You have the entire report?

I am sure it does not say lower 85 degrees of flap and fly around in small circles.

[IvanK]

Yes