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TSR2

Well, you have to, dont you....

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Wolfie01/02/2011 10:56:12
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129 forum posts
218 photos
When I sold up from modelling in the mid 70s I still had a short-list of 3 models that I still wanted to try.
 
Lockheed Starliner
Twin Comanche
and the TSR2

When I was very young I had made a large number of catapault models, the majority of which were F-100s or TSR2s. Time had come for another one, this time slightly bigger.
Documentation and 3views are not the easiest to find for this aircraft but some very good drawings and the ICDF plan from Reg Smith became the starting point.
 
To be realistic I took on board the comments from several ETPS pilots as well as rationalising the design based on strategic role changes.

So the Reg Smith plans were slightly enlarged, corrected in several areas and then re-drawn for EDF power with a pair of 90mm fans.
 
This project started in 2006, first flew in 2010 and is still 'work in progress' as will become clear.
Wolfie01/02/2011 11:03:54
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129 forum posts
218 photos
All the fuselage formers were recalculated for the twin ducting. The fans would be slightly further back than the ICDF version but there would be real ducting and no cheater holes.
This was possible as the intakes worked out as 109% of FSA.



The formers are all 3mm sheet and reinforced with 1,5mm ply in load bearing areas


Construction was in 2 halves (same as for the Twin Comanche model).
Ducting is rolled 1,5mm sheet and the stringers are 4mm sq.
 

Wolfie01/02/2011 11:09:10
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129 forum posts
218 photos

The duct intakes are planked construction. The former at the intake position is in 2 parts the centre of the intake will be completely cut away once the planking is completed.
 




Intake former opened up and the duct planking is glassed and the outer planking is added.
 

Rear ducting in position but not glued yet.
Wolfie01/02/2011 11:15:59
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129 forum posts
218 photos

Control will be tailerons, rudder and flaps. Here the rear taileron servo mounts are placed. Control links will all be very short.
 

Nose formers added and extra stringers and cockpit floor.
 

Planking from the lower edge of the cockpit until there is enough support to be able to remove this half from the building board.
 

The basic framework for the first half, accompanied by the that sharp intake of breath when you suddenly realise just how big it is going to be!
Wolfie01/02/2011 11:19:31
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129 forum posts
218 photos

The first half is jigged in a hardwood frame and the second half formers are added.
 

The flat areas of sheeting (2mm) are glued on.
 

Second intake ducting is planked and glassed.
 

Rear half-formers glued on.
Wolfie01/02/2011 11:22:38
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129 forum posts
218 photos

Outer skin of the intake is planked in 2mm.
 

Second rear ducting is rolled but not glued in position yet.
 

Centre sheeting and servo mount in place.
 

Planking the other side of the nose below the cockpit.
Danny Fenton01/02/2011 11:28:45
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9799 forum posts
4563 photos
Looks good. How do you stop the hardwood frame from sagging in the middle Wolfie?
 
Cheers
Danny
Wolfie01/02/2011 11:43:20
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129 forum posts
218 photos
The frame is approx 3 inch by 3/4 so its very stiff. In any case there isnt much force being applied vertically. I was checking it with a metal straight edge every so often to start but it never moved so I stopped worrying.
Danny Fenton01/02/2011 11:52:43
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9799 forum posts
4563 photos
Okay thanks, there is one shot where you are weighting down some flat side sheeting and that was the bit that worried me
 
Look forward to seeing some more of this one
 
Cheers
Danny
 
Wolfie01/02/2011 11:55:13
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129 forum posts
218 photos

The second half is completed to the same extent as the first and then removed from the jig.
 

Each tail is made up from tapered 4mm spars that are sheeted with 1,5mm. The tongues fit into slots on the rear formers.
 

4° anhedral of the tail.
 

That piece of wood on the left is 40mm sq and over 2,10 metres long.
 
 
Wolfie01/02/2011 12:00:11
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129 forum posts
218 photos

Top planking from front wing spar position to rear of cockpit
 
Wolfie01/02/2011 12:10:54
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129 forum posts
218 photos

Airfoil section is totally different from that of the Reg Smith version. This is much thinner and semi-symetrical.
 

With this much sweep and aspect ratio there would be little point in making a rib sandwich. So only the root and tip sections are cut out. The intermediate ribs are just flat sheet.
 

Front spar is 6mm sq spruce with webbing
 

Basic wing frame is place on fuse to mark up the main spar position.
Wolfie01/02/2011 12:16:49
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129 forum posts
218 photos

Intermediate ribs are shaped by using a metal spirit level wrapped in sandpaper. Slowly working spanwise the centre ribs are brought to the correct shape. Also, doing it this way results in all the correct chamfered edges.
 

Top surface is sheeted with 1,5mm
 

Centre spar and rear spar are added as well as the shear webbing.
 

Second wing goes togther much quicker and its starting to look like I may need a bigger workshop.
Wolfie01/02/2011 12:21:35
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129 forum posts
218 photos

Rudder control is included although I'm not sure its needed.
 

Fin construction is exactly the same as the horizontal tail surfaces.
 

Upper rear fuse is planked and fin and rudder added.

Wolfie01/02/2011 12:33:35
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129 forum posts
218 photos

Between the centre formers 8mm sq reinforcement is added
 

Underside rear of fuse is planked
 

A bit fiddly planking the concave section but it sanded out ok
Tim Mackey01/02/2011 12:35:43
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20920 forum posts
304 photos
15 articles
This is great stuff wolfie
Wolfie01/02/2011 12:38:46
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129 forum posts
218 photos

The anhedral wingtips proved a good test of geometrical construction!
 

 

A set of sub formers give the outline for the cockpit area
 

Underside wing skins are added
 

Skinning the winglets was an excercise in patience.
 

Second wing skin added
Wolfie01/02/2011 12:42:50
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129 forum posts
218 photos
Thanks Tim,
 
But as the song goes, 'you aint seen nothing yet'..... the full extent of my masochism will become clear



Nose is a multilayer of 10mm sheet circles sanded into a cone.
Cockpit area up to the first sub former is planked
 

Marking out the cockpit glazed areas
 

And cutting them out
Wolfie01/02/2011 12:47:32
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129 forum posts
218 photos

As mentioned, the rear ducts are not glued in place. They are designed to be able to be slid back to enable fitting the fans.
 

Duct is slid back to flush with the former. The fan and motor can be placed into the space and the duct slid back in position.
 

Flaps are made up from 2mm sheet and triangular riblets
 


All linked up and there is 30° of operation
Wolfie01/02/2011 12:56:03
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129 forum posts
218 photos
Now then I did say masochist didn't I?
 
Right then, retracts it is (although I may live to regret this......)


Former is cut out to fit the retract unit
 

This will need to be ply doubled for reinforcement before the 10mm sq spruce bearers are added.
 

Main double bogies are made out of 10 and 12mm dural tubing. The axle points are sleeved with brass tube same the bogie pivot point in the centre
 

Retract units are mounted offset at this angle in the fuse. Bogie pivot pin is bent to the same angle so that the wheels are vertical
 

As the bogie pivot pin is fixed at the bogie the wheels retract whilst staying vertical
 

Now standing on her own.

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