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With the photographic detail completed we turned back towards the
north and climbed up to 7,000ft in order for me to try my hand at
aerobatting the Firefly. In my opinion you cant beat either
a good session of circuit bashing or a few loops, rolls and spins,
as a means of assessing exactly how well an aircraft handles. With
the circuit full at Cranwell and low visibility procedures already
in force at Barkston Heath, it appeared that a few touch-and-goes
were out of the question, so the next best thing was clearly going
to be a session of aerobatics.
As it had been a while since Id flown aerobatics in a piston-powered
aircraft, Robert suggested that he demonstrate each manoeuvre first,
and then I would do my best to replicate it. After a clearing turn
and a double-check on our harnesses, a couple of loops were the
first thing on the agenda, which I found were relatively straightforward
to perform. Entry speed was around 130 knots, and the Fireflys
excellent handling and good visibility made the manoeuvre practically
effortless.
Some aileron and barrel rolls were next, and after a couple of very
precise demonstrations from Robert, I tried my hand at a couple
of rolls. The mistake I always seem to make when I roll a new type
of aircraft for the first time is that I dont get the nose
far enough above the horizon before starting the roll. True to form,
I did exactly the same thing during my first roll in the Firefly,
with the inevitable result that I dished out of the bottom of the
roll. On my second attempt I made a conscious effort to raise the
nose another 10 degrees, and that worked out rather nicely, if I
say so myself. A couple of stall turns were very easy, although
my initial attempts at reproducing Roberts very smooth Cuban
Eights left much to be desired.
Robert is an excellent instructor, and he succinctly explained what
I was doing wrong, and what I needed to do to get it right, with
the result that my next attempt at a Cuban Eight was much, much
better. Robert then took control and demonstrated a flick out of
a barrel roll, before slowing down to show me the Fireflys
spin characteristics. As we approached the stall the stall-warner
activated at around 65 knots, and at 55 knots pre-stall buffet could
be clearly felt through the airframe. Entry to the spin was quite
vigorous, although the Firefly soon settled down into a perfectly
normal erect spin. As soon as anti-spin control inputs were applied,
the Firefly recovered promptly.
All too soon it was time for us to return to Barkston Heath, but
unfortunately, as visibility in the circuit was still rather restricted,
it was not possible for Robert to give me the landing. Speeds used
in the circuit were 90 knots downwind, reducing to 80 as Robert
swept the Firefly round in a curving constant aspect
approach. As Robert rolled the wings level and settled the Firefly
on final, the speed bled back to 75, with a threshold speed of 70.
A nice smooth flare and the Firefly settled gently onto the runway.
In conclusion, I thought the Firefly was an excellent primary trainer,
and it clearly suits the requirements of the Joint Elementary Flying
Training Schools well. Although not the fastest 260hp aeroplane
around, its excellent climb rate and crisp handling make it ideal
for the training role. It is also a lot of fun to fly!
History
Although the military had traditionally undertaken all flight training
in house, the Joint Elementary Flying School (JEFTS)
was set up in 1993, after it had been decided to sub-contract the
work out to civilian firms. Hunting Aircraft Ltd (now Hunting Contract
Services) took up the contract, and began flying training at Topcliffe
in 1993 with 17 T67M Mk.IIs.
Initially, the concept of JEFTS met with considerable resistance
and scepticism from the military establishment, who doubted that
a civilian flying training organisation would be able to train pilots
to match the very high standards expected by the Royal Air Force,
Army and Royal Navy. Events swiftly proved these doubts to be entirely
without foundation pilots graduating from JEFTS had been
trained to exactly the same high levels as their predecessors.
For a civilian flight training school, JEFTS is a huge organisation.
Hunting currently operates 45 Slingsby Fireflies from four military
bases and the company graduates around 500 students every year,
flying around 16,000 hours in the process. As well as providing
basic flight training for the RAF, RN and Army, the school also
trains considerable numbers of foreign students and also civilian
instructors. JEFTS operates two different variants of the Firefly
in the training role the relatively low-powered 160hp T67M-MkII
and the top-of-the-range T67M-260.
Towards the end
of 1970, renowned French designer Rene Fournier began work on the
RF6. This was to be a side-by-side training aircraft of wooden construction.
A slightly smaller version, the RF6B Club first flew on March 12,
1974. This aircraft was powered by a 90hp Rolls-Royce Continental
engine, although production aircraft were powered by a 100hp engine.
Between 1974 and 1980 Fourniers company, Avions Fournier,
built 45 100hp RF6B-100s and one RF6B-120 this aircraft being
powered by a 118hp Lycoming engine.
Slingsby Engineering Ltd (subsequently renamed Slingsby Aviation)
obtained a manufacturing and marketing licence from Avions Fournier
and flew its first RF6 (now designated T67) in May 1981. The T67A
was powered by a 160hp Lycoming and, like its predecessors, was
constructed primarily from wood. With the T67B and all subsequent
variants, Slingsby switched to constructing the airframe primarily
from GRP.
The aircraft has sold steadily over the last ten years, and Slingsby
has delivered more than 250 aircraft to both civil and military
operators in 12 different countries. The biggest purchaser of the
type was the USAF, which bought 113 T67M-260s as the T-3A Firefly.
Unfortunately, the T-3As service with the USAF was rather
inauspicious, as the type suffered a number of fatal accidents,
culminating in a 1997 grounding order.
The T-3As rather poor service record with the USAF was amplified
by the fact that the aircraft it replaced, the Cessna T-41 Mescalero,
had suffered no fatal accidents in 30 years of service.
In fairness though, it should be pointed out that the T-41 was a
far less capable aircraft than the T-3A that replaced it, and was
incapable of performing aerobatics. It should also be pointed out
that Hunting, and indeed every other operator of the Firefly, are
extremely happy with the aircraft. Indeed, a Hunting pilot, Alan
Wade, has won a number of aerobatic competitions in the Firefly.
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| Statistics and Contacts |
DIMENSIONS |
| Length |
24ft
10in |
7.5m |
| Height |
7ft
9in |
2.3m |
| Wingspan |
34ft
9in |
10.6m
|
| Wing
Area |
136
sq ft |
12.36
m2 |
| Aspect ratio |
8.9:1 |
Weights and Loadings
|
| Empty
weight |
1,750
lb |
794
kg |
| Max
AUW |
2,550
lb |
1,157
kg |
| Useful
load |
800
lb |
363
kg |
| Wing
loading |
18.75
lb/ft2 |
91.6
kg/m2 |
| Power
loading |
9.8lb/hp |
5.96kg/kW |
| Fuel
capacity |
35.5
Imp gal |
162
lit |
| Baggage capacity |
66lb |
30kg |
Performance |
| Vne |
195kts |
361km/h |
| Cruise |
140kts |
259km/h |
| Stall
|
54kts |
100km/h |
| Climb
rate |
1,380
ft/min |
8m/s |
| Service
ceiling |
19,000ft |
5,790m |
Engines
Textron-Lycoming AEIO-540-D4A5 air-cooled flat-six,
producing 260hp (194kW) at 2,700rpm
Propellers
Hoffmann three-blade variable pitch.
Manufacturer
Slingsby Aviation Ltd, Kirkbymoorside, Yorkshire, UK.
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This article appeared in the April
2001 issue of Today's Pilot.
The April issue is now out of
print, if you would like to order a copy of this article
please contact our mail order department.
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