Echo...

[petermcleland]

Peter,
Just out of curiosity, how were you able to spot an imminent stall with the hydraulically powered/spring loaded controls? Was it just based on airspeed reading or attitude gauging, sound maybe, stick pusher?

Macs...with the Mark 1 Hunter, the answer was that you couldn't spot it at all...And since it started with a "Tip Stall" there was an immediate and vicous "Tuck In" which almost immediately caused a "Compressor Stall".

However, the "Saw Tooth" leading edge transformed all that and made the stall very similar to that of the Meteor...As you started to pull too tight a harsh rumbling started which got louder if you persisted. So you just eased off a bit till the rumbling noise stopped...Lovely gentle and forgiving approach to the stall. No stick pushers or warning horns...Just not needed

Compressor Stall was eliminated by the spring loaded letter boxes on top and bottom surfaces of the intakes...These auto-opened against their springs if the angle of attack got too steep and supplied extra air to overcome the masking effect :flying:

[DaveG]

Compressor Stall was eliminated by the spring loaded letter boxes on top and bottom surfaces of the intakes...These auto-opened against their springs if the angle of attack got too steep and supplied extra air to overcome the masking effect :flying:

Hi Peter

Do you know when these were introduced ? i.e. which mark Hunter?

[Macs]

Macs...with the Mark 1 Hunter, the answer was that you couldn't spot it at all...And since it started with a "Tip Stall" there was an immediate and vicous "Tuck In" which almost immediately caused a "Compressor Stall".

However, the "Saw Tooth" leading edge transformed all that and made the stall very similar to that of the Meteor...As you started to pull too tight a harsh rumbling started which got louder if you persisted. So you just eased off a bit till the rumbling noise stopped...Lovely gentle and forgiving approach to the stall. No stick pushers or warning horns...Just not needed

Compressor Stall was eliminated by the spring loaded letter boxes on top and bottom surfaces of the intakes...These auto-opened against their springs if the angle of attack got too steep and supplied extra air to overcome the masking effect :flying:

Peter,
Very interesting. As always, thanks for the info.
regards,
Macs

[petermcleland]

Compressor Stall was eliminated by the spring loaded letter boxes on top and bottom surfaces of the intakes...These auto-opened against their springs if the angle of attack got too steep and supplied extra air to overcome the masking effect :flying:

Hi Peter

Do you know when these were introduced ? i.e. which mark Hunter?

Dave,

The 6s and 9s had them but I'm not sure about others...I will look through my David Griffin CD and see if that reveals the answer

[petermcleland]

Dave,

The letterboxes are not specifically mentioned...However, I'm fairly confident that they were part of the "Mod 228 wing" and here is a bit of text that seems to indicate that they would be on all F6s and FGA9s and a handful of F4s:-

"The more powerful engine led to pitch-up problems, and the area of the outer wings was increased to compensate, resulting in
the introduction of a distinctive leading edge ‘dogtooth’. This had previously been trial fitted to the F.Mk.1 but not adopted
for that mark. The new wing, known as the ‘Mod 228’ wing, could be fitted with an outer ‘wet’ stores pylon on each wing to
allow it to carry four external tanks, increasing the fuel capacity even more. The early Hunter F.Mk.6 production used the
older F.Mk.4 wing pattern, but all were eventually retrofitted with the Mod 228 wing, as were a handful of F.Mk.4s."

[DaveG]

Thanks for looking that up Peter.
I'll remove them from the models with the earlier wing then

[airboatr]

good stuff.
looking forward to flying it in FSX Dave G.

[petermcleland]

Well, keep a backup Dave...I'm not infallible and I've never flown an F4

The F1 certainly had no letter boxes but I've no idea about the Saphire marks.

[garethfs]

Great work on this one - Dave and Peter! She's an absolute beauty.

Gareth