Author Topic: Heston Type 9 "Adder"  (Read 7169 times)

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Heston Type 9 "Adder"
« on: June 10, 2013, 04:04:43 AM »
Some background:

German forces were defeated in the Ardennes in 1940, and Nazi Germany was defeated by the end of 1941. The expansionism of the Soviet Union was seen as the next major threat and Western Europe united to put an end to it. That fight was not over so quickly....
Some more on that history in my "Erryplanes" thread

On 12 May 1944, the British Air Ministry requested proposals for single seat fighters powered with a single Rolls-Royce Derwent turbojet. To save time, Heston Aircraft based their new design on the successful Basilisk piston-engined fighter (itself developed from the Heston Dragon interceptor).

The piston engine was removed and the jet engine mounted underneath the forward fuselage so that its exhaust exited underneath the middle of the fuselage. To protect the fuselage, a steel heatshield was added to its bottom.
---

Below are the earlier Heston fighter designs, and my first lines for turning the Basilisk into an Adder.
« Last Edit: June 17, 2013, 09:48:26 PM by perttime »

Offline GTX_Admin

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Re: Heston Type 9 "Adder"
« Reply #1 on: June 10, 2013, 04:07:09 AM »
Interesting...
All hail the God of Frustration!!!

Offline father ennis

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Re: Heston Type 9 "Adder"
« Reply #2 on: June 10, 2013, 06:55:08 AM »
Very Kool ... !!!!!!
I may be old but I'm not dead ... yet anyway ... !!!    And NO I did not know Richard III !!!!!!

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #3 on: June 10, 2013, 07:09:46 PM »
With a bit of color and a cockpit...


Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #4 on: June 10, 2013, 08:42:34 PM »
A little more paint and a top view:

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder" - the 1945 prototype
« Reply #5 on: June 10, 2013, 10:59:49 PM »
On 12 May 1944, the British Air Ministry requested proposals for single seat fighters, powered with a single Rolls-Royce Derwent turbojet. To save time, Heston Aircraft's chief designer George Cornwall based his new design on the successful Basilisk piston-engined fighter (itself developed from the Heston Dragon interceptor).

The piston engine was removed and the jet engine mounted underneath the forward fuselage so that its exhaust exited underneath the middle of the fuselage. The aircraft's nose was recontoured to allow for the engine placement, the armament of four 20 mm guns, and an additional fuel tank. In the tail, the ducting for the radiator of the piston-engined Heston fighters was removed, allowing a slimmer tail cross section. No changes were made to the wings other than the elimination of the air intakes, and reshaping of the front spar to clear the engine. The vertical stabilizer was redesigned to keep its bottom end out of the blast of the engine, and its top part was correspondingly enlarged. To protect the fuselage, a steel heatshield was added to its bottom.

Taxi tests began in November 1944, but the heatshield proved to be too short and the heat from the engine exhaust scorched the surface of the rear fuselage as well as the rubber tire of the tailwheel. Modifications to rectify the problems took until January 1945. The first prototype was ready for flight testing on 11 February, followed by a second one in April.

The tests revealed a number of problems: the engine exhaust damaged the surface of the airfield, the cockpit sometimes filled with smoke from oil that had dripped onto the engine, and the aircraft was short-ranged. However, the aircraft now named "Adder" proved to be easy to fly, and with a top speed of 848 km/h - or 527 mph - it was significantly faster than any propeller driven aircraft. The reshaped nose of the "Adder" also gave the pilot an improved view forward, compared with single-engined propeller fighters.

In July 1945, the Air Ministry ordered 150 Heston Type 9 "Adder" Mk. I fighters which were to be used both operationally and for converting pilots to flying jet aircraft. Only 36 production aircraft were completed to Mk.1 standard, the subsequent ones being upgraded to Mk. II.


Offline GTX_Admin

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Re: Heston Type 9 "Adder"
« Reply #6 on: June 11, 2013, 02:25:48 AM »
Mmmmmm..... :-*
All hail the God of Frustration!!!

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #7 on: June 11, 2013, 04:13:45 AM »
Now I need to put together something that was flying in '46 and later. Mk.II - but it needs some minor modifications...

Offline Dr. YoKai

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Re: Heston Type 9 "Adder"
« Reply #8 on: June 11, 2013, 05:27:59 AM »
 Very attractive!   I also appreciate your going the extra mile and doing a
 top view.


Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #9 on: June 11, 2013, 02:33:15 PM »
I also appreciate your going the extra mile and doing a top view.

When I started making these drawings, I wanted to see at least the top view too. The front view is often the one that I find hard to do.

The top view of this one was pretty easy, as it is very much based on my earlier propeller fighters: http://beyondthesprues.com/Forum/index.php?topic=2970.15

Re: Heston Type 9 "Adder"
« Reply #10 on: June 11, 2013, 10:44:47 PM »
The Adder is absolutely gorgeous!!!  :-*

Offline Brian da Basher

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Re: Heston Type 9 "Adder"
« Reply #11 on: June 13, 2013, 03:40:55 AM »
The Norwegian one is especially spiffy!

Great stuff, perttime!

Brian da Basher

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #12 on: June 13, 2013, 02:48:29 PM »
Thanks for the compliments!
Myself, I'm really happy with the prop fighters that I put in the first post. They are my last year's stuff, though. So, in context of the GB they only serve as background material.

Adder Mk.II is in progress, and it will go into the 1946 - 1952 period.

Offline perttime

  • The man has produced a Finnish Napier Heston Fighter...need we say more?
Re: Heston Type 9 "Adder"
« Reply #13 on: June 14, 2013, 11:05:32 PM »
"Color" scheme for Adder Mk.II.

Somebody suggested wing tip tanks to improve the range.

Offline GTX_Admin

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Re: Heston Type 9 "Adder"
« Reply #14 on: June 15, 2013, 03:13:09 AM »
 :)
All hail the God of Frustration!!!