The next type of microlight to be registered in New Zealand was the Mitchell Wing.
The Mitchell Wing is the brainchild of Don Mitchell, an aeronautical engineer who worked for Northrop during WW 2 and participated in the design of the Northrop Flying Wings. In the 1974 a hang gliding enthusiast, Dr Howard Long, approached Don Mitchell to design a foot launched hang glider wing which became the highest performance hang glider of the time. An engine was added to become the model B 10F (for foot launched) and then Don Michell fitted a tricycle undercarriage with a steerable nosewheel, and the B 10 Mitchell Wing was born. By 1980 over 500 sets of plans or kits had been sold which gives an idea of the success of the ultralight/microlight.
The structure of the wing was of a thick plywood spar with foam D ribs covered in 1 mm ply and built up wooden ribs. The wing was covered with Ceconite which made it more like a homebuilt aircraft of the time. At the ends of the wings were rudders that could also act as air brakes, and in the absence of a tail, roll and pitch were controlled by stabilators which operated differentially like ailerons but could also move up or down together like elevators. 3 axis control was by a control stick.
The length of the B 10 Mitchell wing was only 6 feet (1.83 metres) and the wingspan was 34 feet (10.36 metres). The wing area was 136 square feet. Empty weight was 185 pounds (84 kg) and MAUW was 525 pounds (238 Kg). And with a two stroke 23 HP Zenoah G25GB-1 engine the cruise speed was around 45 mph and the stall speed was around 25 mph.
We have had five B 10 Mitchell wings registered in New Zealand plus one U-2 model (this was also called the Mitchell Super Wing and had a 9 foot long fully enclosed fuselage while retaining the same wing).
ZK-FEJ (c/n MAANZ/109). Mitchell Wing B 10 Registered 2 Dec 1982 to Bruce J. Lambess & G. N. Johnstone, Whangarei, then 12 Jan 1984 G. N. Johnstone & J. D. McKay, Whangarei, then 26 Aug 1987 B. J. Lambess & G. N. Johnstone, Feilding (later Warkworth). Cancelled 25 Nov 1998 as withdrawn from use. (I did see this machine at Feilding when I was a member of the Manawatu chapter of the AACA (as was Bruce Lambess) and it was stored without the covering).
ZK-FFT (c/n MAANZ/204) Mitchell Wing B 10. Registered 20 Jun 1983 to R. G. Johnston, Foxton. then 21 Apr 1986 Andrew A. Jasper, Westport. Cancelled 26 May 1995 as withdrawn from use.
ZK-FKY (c/n MAANZ/330) Records show that this was a Mitchell Wing B 10 but it doesn't look like one to me. The answer is found in the accident report:
"The redesigned aircraft was very different from the original Mitchell Wing B10. It comprised an enclosed, streamlined fuselage with a rear mounted engine and propeller. Tricycle undercarriage was fitted, with a retractable nosewheel. Tail booms on either side of a shoulder mounted stub wing supported the tailplane, elevator and twin fins and rudders. Detachable outer wing panels allowed easy trailerage on the ground. The structure was mostly wood, with plastic foam ribs and stiffeners under plywood skins. A light alloy frame structure supported the engine and wings." Also of interest in the accident report was that the aircraft was fitted with a ballistic recovery parachute (but it wasn't deployed before the impact. I did not realise that ballistic parachutes were available this early.
ZK-FKY was registered on 30 Apr 1985 to A. M. Fairburn, Pukekohe. Engine failed in 1986 and withdrawn from use.
Then in Jan 1990 the airframe was returned to airworthiness and the aileron droop system was removed in attempt to make elevators more responsive. Following several abrupt pitches up and down one wing came off and
the machine fell into the Waikato river, 4km NE of Port Waikato
(owner-pilot killed) 25 Jan 1994. Cancelled 1 Sep 1994 as destroyed.
ZK-FVC (c/n P1416 and MAANZ/432) Mitchell Wing B 10
Constructed in Canada as C-IFOQ
1984 Registered 17 Aug 1987 to Chris J. Easton, Toronto, Ontario. Cancelled from the Canadian register 22 Sep 1989 and exported to New Zealand.
Registered ZK-FVC 2 Nov 1989 to Chris J. Easton, Maraetai, then 19 Sep 1998 Daniel G. Sutherland, Whakatane. Cancelled 11 Apr 2006 as registration revoked
Cancelled 22 Sep 1989.
ZK-LYN (c/n AACA/324) Mitchell Wing B 10. Lyn was Geoff Tubby's wife.
Registered 7 Dec 1982 to Geoff A. Tubby, New Plymouth. Cancelled 2 Oct 1996 as withdrawn from use.
And our only U2 Mitchell Super Wing was also built by Geoff Tubby after his earlier B 10 model:
ZK-LGT (c/n AACA/324/2) U2 Mitchell Super Wing. Registered 20 Nov 1987 to Geoff A. Tubby, New Plymouth. Cancelled 2 Oct 1996 withdrawn from use.
I have tried quite hard to see if I could find a photo of ZK-LGT but to no avail - does anyone out there have a photo of it?.(if so I would love to see it). So below is a photo of a U2 Mitchell Super Wing from Air Britain so you can see what the type looked like: