Lysander Performance.
Thread Starter
Lysander Performance.
For those unaware, the above mentioned a/c was for STOL operations during WW2. It had the engine to drag it through the air at a good speed and the wings and flaps to fly slow.
I believe this a/c was able to cruise up to 4 times it's stalling speed. This was according to a chap that operated the type then. Giving it some thought that is quite impressive even for modern a/c.
Is anyone able to name any other subsonic a/c able to achieve this wide range in speed variation??
I believe this a/c was able to cruise up to 4 times it's stalling speed. This was according to a chap that operated the type then. Giving it some thought that is quite impressive even for modern a/c.
Is anyone able to name any other subsonic a/c able to achieve this wide range in speed variation??
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The last two military jets that I flew could, or do you mean only pistons.
The quoted stalling speed of the Lysander was 65 mph, and I doubt therefore whether it could achieve 260.
The quoted stalling speed of the Lysander was 65 mph, and I doubt therefore whether it could achieve 260.
Gnome de PPRuNe
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212mph was its max speed says Wiki, certainly Shuttleworth's example performs in quite a spritely manner.
SA Pioneer stall speed 36 mph; cruise 141mph; max 162mph.....
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As an ex-employee of the great Shorts company in the 1960s it was always said that the 1950s Seamew had the biggest speed range of anything going, with a stall speed in the 30s and some silly speed achievable in a terminal dive. I don't have pilots' notes or an ODM to verify numbers, but will check in due course.
But if cruise speed is the reference point isn't this just a function of the engine size, wouldn't Vs/Vd be more relevant?
The Seamew had a big barn door of a wing for 'loitering' until it was discovered that helicopters could do it better, but it was an attack aircraft so launching weapons in a dive was also part of its remit.
Feroxeng
But if cruise speed is the reference point isn't this just a function of the engine size, wouldn't Vs/Vd be more relevant?
The Seamew had a big barn door of a wing for 'loitering' until it was discovered that helicopters could do it better, but it was an attack aircraft so launching weapons in a dive was also part of its remit.
Feroxeng
The Shark UL:
Max. cruising speed 300 km/h
Optimum cruising speed 250-270 km/h
Stall speed, clean 80 km/h
Stall speed, full flaps 64 km/h
https://www.shark.aero/images/shark_ul/shark_ul_01.jpg
https://www.shark.aero/shark-ul
Max. cruising speed 300 km/h
Optimum cruising speed 250-270 km/h
Stall speed, clean 80 km/h
Stall speed, full flaps 64 km/h
https://www.shark.aero/images/shark_ul/shark_ul_01.jpg
https://www.shark.aero/shark-ul
The JMB VL-3:
Stall speed with flaps - 53 km/h
Max cruise - 305 km/h
https://www.jmbaircraft.com/aircraft
Stall speed with flaps - 53 km/h
Max cruise - 305 km/h
https://www.jmbaircraft.com/aircraft
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Feroxeng: On one of my Ulster tours I managed to visit Shorts to enquire whether they had any Pilots Notes for the Seamew. A kindly soul took me on a lengthy trek of the factory but it transpired that the company had recently had a clear out of the paperwork of all un-supported types. I asked the appropriate department specifically about the Seamew but nobody could remember if there were company notes for it or not. One person did say that he thought everything had been put on micro fiche before the originals were burned but said the company responsible for the micro fiche had yet to supply them. Naturally I pleaded to be notified if and when they were available but sadly never heard.
The Pioneer PN ( 1st edition November 1953) gives the following speeds all in knots.
Maximum for
Diving 160 (not shown as VNE for some reason)
Flaps lowered 60
T/O must have been a joy. 'At 20 kts the aircraft becomes airborne and can be climbed steeply at 35 kts'.
The Pioneer PN ( 1st edition November 1953) gives the following speeds all in knots.
Maximum for
Diving 160 (not shown as VNE for some reason)
Flaps lowered 60
T/O must have been a joy. 'At 20 kts the aircraft becomes airborne and can be climbed steeply at 35 kts'.
Fieseler Storch not far off - 175 km/h (94 kt), stall 46 km/h (25 kt), about 3.8 to 1.
The Fieseler Fi 97 was even better - 245 km/h, 58 km/h, 4.2 to 1
Auster V just makes it, 113 kt, 28 kt, 4.04:1
The Fieseler Fi 97 was even better - 245 km/h, 58 km/h, 4.2 to 1
Auster V just makes it, 113 kt, 28 kt, 4.04:1
Last edited by topgas; 27th Jun 2019 at 21:58.