No not the one due back soon from its lengthy restoration to be put on show at Newark, but the one in Denmark! I photographed OY-DAZ this month.
Once G-AEYF, ST-25 it was built in 1937 and used as an air ambulance, so sports a starboard side door which allows a stretcher to be accommodated. The machine is immaculate and now hangs from the roof of the museum at Helsingor just north of Copenhagen. It has moved around somewhat since preservation and seen stints at a Billund site (now closed) and more recently was at Egeskov Castle.
Since the demise by fire in New Zealand twenty years back of the (then) airworthy ST-25 ZK-AFF, this has become the sole survivor of this version and the only other GA Monospar around is VH-UTH is a single-finned ST-12, with NAM in the UK. I was so bowled over by OY-DAZ that I took a few different views! How nicely it would fit in at Old Warden if airworthy!
Tim
By: Consul - 28th July 2007 at 23:39
Thanks for searching that out Andy – is it a page from a volume of “Aeroplane Maintenance and Operation” published by Newnes?
Tim
By: Lindy's Lad - 28th July 2007 at 22:33
Bonkers with a hint of genius…..
Thanks for the info. I am now better informed! 😀
By: AndyG - 28th July 2007 at 22:14
I’ve located this pictorial description, but I also have a full wing assembly sequence somewhere too. It’ll take a while to locate, however you may get the general idea from this in the mean time.
[ATTACH]155842[/ATTACH]
By: Lindy's Lad - 28th July 2007 at 20:23
OK, thanks. It still seems a little eccentric though… perhaps thats why it never caught on. (plus you can’t fit fuel tanks, etc, into the wing…)
Were any other types (OTHER THAN G.A.L) designed with this concept? Just how popular was it?
questions, questions….;)
By: AndyG - 28th July 2007 at 19:52
Nice…
Anyone got a simple schematic of the wing – I’d be very interested to see how they designed it with only one spar! Common design rules dictate that the wing would flex around its lateral axis (Unless of course I misunderstand the concept….)
I have a few old aviation books which cover the assembly of a monospar. I’ll scan an image or two of the arrangment when I get a mo.
As I recall (TBC) it has a lot of wire rigging. Bracing takes the form of single struts projecting perpendicular from the fore and aft of the spar web, along the middle of the spar from root to tip. Each single strut forms the apex of a pyramid with four bracing wires projecting back to the top and bottom spar webs. These pyramids of wires sit side by side and work together as well as with the similar arrangment forwards of the spar. It makes a lof more sense when you see it, but it is very tortionally rigid as a result, thus negating a functional rear spar member.
By: Lindy's Lad - 28th July 2007 at 19:19
Nice…
Anyone got a simple schematic of the wing – I’d be very interested to see how they designed it with only one spar! Common design rules dictate that the wing would flex around its lateral axis (Unless of course I misunderstand the concept….)
Sign In
July 28, 2007 at 7:15 pm