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[Piotrek1]

Great topic, with a dose of humour and reliable information about aviation issues, and also a beautiful example of cooperation and yours friendship, I think you're guys on a good course, so keep it up!
It was nice to meet you "face to face" and learn how other users spend their free time and what their interests are, Thank you also for wanting to share your privacy with us .

Translated with www.DeepL.com/Translator

Best regards,
Piotrek

[SAS~Storebror]

Thanks Piotrek.
It's been a really great time.
South Africa is an absolutely cool country, definitely worth visiting, and Piet+Marli took very good care of me
We've done things that would be absolutely Verboten! anywhere in germany and probably across whole europe.
Cool stuff, all time.

Time for some engine porn again.
This was the first time for me to see a BMW 003 in real life.










Mike

[Flanker27]

its really amazing how modern that engine looks, if i didnt know what it was i would say it was from a business jet or something

[SAS~Storebror]

In fact the BMW 003 was technically ahead of the Jumo 004 in many ways, the only big issue was that the thrust of the initial series (A-2) was lower than the one of the Jumo, which is why the Jumo was the preferred fallback engine for the first german jets - apart from teething development problems, but the same applied to both engines, Jumo and BMW.


Mike

[SAS~CirX]

Here's a question for you experts.
Anyone know what this folded sheet attached to the wing's leading edge is good for?
It's there on both wings.




Mike

Sorry to interject, but I asked around a bit, and found the explanation of these strips. I quote:

Harry Foulds: Stall strip.
Stall strips are used to initiate flow separation at chosen locations on the wing during high-angle of attack flight, so as to improve the controllability of the aircraft when it enters stall. They are typically employed in pairs, symmetrically on both wings.

Pieter Delen: It is a pre warning of an approaching stall. It causes earlier airflow separation over the inboard part of the wings at high AOA, so this turbulent air flows over the tail and the pilot feels this turbulence through the stick as buffeting, while the outboard part of the wings still have good airflow and yhe ailerons stil function to keep the wings level. If you just push forward on the stick - AOA decreases, normal airflow resumes and the impending stall is averted.

armed with "stall strips" to google, I found them on another aircraft,

https://www.flightlineweekly.com/single-post/2018/01/15/de-Havilland-Canada-DHC-1-Chipmunk

Strakes were fitted to deter spin conditions and stall breaker strips along the inboard leading edges of the wing ensured that a stall would originate in this position as opposed to the outboard section.

[SAS~Storebror]

Fine, perfect match for what Plowshare and /me came up with.

Probably it's been used to induce kind of an "artificial stall" so that the wing would enter a controlled stall further inboard, far away from the ailerons, before the plane would actually enter an uncontrollable stall on the outboard wing section.
That at least would make sense.

Mike

[SAS~CirX]

Fine, perfect match for what Plowshare and /me came up with.

Probably it's been used to induce kind of an "artificial stall" so that the wing would enter a controlled stall further inboard, far away from the ailerons, before the plane would actually enter an uncontrollable stall on the outboard wing section.
That at least would make sense.

Mike

yup. you guys were right on the money!

[SAS~Storebror]

As always - you just forgot to say

[Flanker27]

makes sense the mirages and  Saab Viggen have a set up called dog teeth

[SAS~Storebror]

Saab Viggen is mean.
I hope they'll have one on the Danish Air Show this year.


Mike

[SAS~CirX]

As always - you just forgot to say

Danie Pretorius : l did the final assembly of the odd number Mk2 Impalas at Atlas. For the very first testflight we fitted these stall angles at a zero incedence on both wings with aluminium tape, very much like duck tape. The pilot do a approach configuration stall at 25,000 feet. If one wing stall before the other wing then the aircraft roll over. We will then move the stall angle down by 1 or 2 mm on the dropping wing or upwards 1 or 2 mm on the flying wing. We will keep on adjusting these stall angles up or down until the aircraft's wings stall simintainiously to provide a 'safe' stall. Only then we finally poprivited these stall angles permanently to the wing.

[Knochenlutscher]

My Cousin is infected by South Africa and Australia, he does yearly Trips to both. Everytime he forgets the Biltong I wished to
taste, bringing me Newspapers instead.  Anyway, found a way to produce a cheap copycat made out of Eastern German Beef and
some Spices my aunt brought me from South Africa. Rouladen Biltong a la Knoch, absolute emergency style, but tasty, my Cats and Familly didn't like it,
so it must be tasty.
Keep an eye on each other and have nice days

Best wishes
Tobias