Fritag

Very nice interior PC; I’d be chuffed with that woz I you.

Enjoy

Remarkable.

Lovely (small) canopy G. Very neat.

I think that's right John. As I recall, with combat slats in automatic the slats deployed as the AOA increased. I've checked and think the slats came out (to 9 degrees compared with 23 degrees for full slats) when the AOA increased above 5 alpha and retracted when below 4 alpha, subject to being automatically retracted at higher indicated speeds (580 kts plus, but it depends on the Mod state). I don't remember ever operating the combat slats in anything but the automatic mode. In particular I don't remember ever manually selecting combat slats in or out - but I'm not sure now whether that reflects the SOPs/Mod state in the late 80's/early 90's or if it's a failure of memory.......indeed I can't really remember ever worrying (or even thinking) about the position of the slats at all....... Steve

I missed the build Ced. As my old school reports said - ‘must concentrate more in class...’ But I can at least add my approbation of the result

Beautiful. Your finishing skills and results just get better and better Johnny. Work of art.

Ditto. I almost feel an existential crisis coming over me How much shape/dimensional accuracy is reasonable/necessary/practicable? and how much of it survives the trauma of construction/finishing? I’m gonna go and lay down in a darkened room and contemplate new benchmarks being set........

Navy Bird and a CMR resin kit. Feels like we’re putting the band back together. All is well.

Nice to have a reason to dredge the memory banks and see how much space is still clogged up with such stuff....... As John says, the slats are fully out for take off. Nominally 23 degrees FWIW. But I’ve no idea how that is measured and it was interesting to hear that the engineers adjusted the flaps by reference to a linear measurement rather than an angle. Makers sense. I wonder if I knew that once? The slats were automatically fully out when any flap was deployed, and from the pilots perspective one simply selected the flaps down and the slats did their own thing.

Further thought has reminded me that I should also have added that it could also be the Auto Stab system working without pilot input. As @stringbag says; that configuration would be for a roll to the left. If your want to depict an aircraft starting a turn to the right, then you want the right spoiler slightly raised (max was c.45 degrees) and the right tailplane leading edge lower than the left tailplane leading edge. But don’t over do it. The tailplane leading edge moves only a max of 6 degrees (had to look that up - I don’t have that sort of memory!) above or below the neutral position at max deflection. Photo’s will be your friends as to how much deflection to show on the spoiler/tail plane but it won’t be anywhere near full deflection. Just for interest; roll control by differential tailplane was gradually phased out at increasing air speed and at low level cruise speed of 450kts roll control was by spoiler only.

And PC can go back to peaceful sleep......I reckon that’s a 2 a.m. Chicago time reply you forced from him then Ced.....

I’m only 5 years (and 2 days) behind. But I’m glad I belatedly spotted it; I’ve caught up now Ambitious and impressive project, not to mention instructive. Should I make a note in the diary for next year - or hope for earlier

That’s Ok Alan; I’ll keep the flame alive ‘till your past the loathing. It can lodge ‘till then on my fav. list. I shall miss this thread. It’s been a reliable provider of much enjoyment; not least from the hendie grumbling about perceived non-perfection (which I have come to believe is a purely subjective condition not readily apparent to the objective observer ). It’s also been jolly informative. And if I had any retentive brain cells left I’d be hanging onto new (to me) concepts such as SACRUs and BIMs. P’raps we ought to have a test in a year’s time......

That’s the port wing spoiler that is somewhat raised Massimo. Roll control in the Jag is a mixture of differential tailplane and asymmetric wing spoiler (spoiler deploys only on the down-going wing) the extent of spoiler deployment (and tailplane movement) is proportionate to the degree of control column displacement. That looks like an air show take off in a clean Jag; could be that the aircraft is just starting to roll to the left. I can’t see any differential tailplane - so I guess the spoiler deploys before the tailplane begins to move (I can’t remember - I only drove them........). Interestingly - If you look closely at the other take off photo you posted - a Jag with a combat load, you can see that the starboard spoiler is very slightly raised. It’s unlikely the pilot is intending to roll to the right during this take off; so he’s probably just flicked the control column momentarily very slightly to the right, maybe to make a slight correction/keep the aircraft level, and/or maybe without really noticing he’s done it (some pilots are notorious stick 'stirrers'). There’s no visible differential tailplane. If you’re depicting a take off, Massimo it would be correct to leave the spoilers flush with the wing - unless you want to deliberately model an aircraft starting a turn - but then you’ll need to think about the tailplane too. If you wanted to you could model one of the spoilers very slightly displaced as in the above photo. But then you’ll end up having to explain why........(But at least now you know ) IIRC take off flap is 20 degrees. That’s 20 degrees for the inboard flap sections. The outboard flap sections (as you can see in the photos) are always at less of an angle - but I don’t know what angle the outboard flaps are at when the inboard ones are at 20 degrees (we only used to think in terms of one (the inboard) flap angle - too difficult for muppet pilots to do otherwise....) . I know that the inboard flap travel was 0 to 42 degrees and the outboard was 0 to 25 degrees so it may well be that on take off the outboard ones were at about 12.5 degrees. But that’s (logical) speculation.