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XF-89 Scorpion Prototype in 1/72 scale


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Having just got into Scorpions - the Norhrop F-89 variety - I thought I'd have a go at making the XF-89 prototype using the Hobbycraft F-89B.

The first area of difference concerns the fuselage above and below the jetpipe - the XF-89 did not have the fairings to divert the hot exhaust gases - so the fuselage needs to be modified.

The hatched area show what needs to be removed....

Scorpion_014.jpg

I have filled the insides with Milliput - in case I break through the plastic when rubbing down.....

Scorpion_015.jpg

This is all being worked out as I go along - using a scaled-up drawing from the Aerofax book - bodging and filling.

The area of the 'wake fairing' is quite substantial - both above and below the wing root at the rear - and as I started to rub down, the Milliput came off.

So I have added a plastic card 'keel' to establish the lower contours and a couple of bulkheads to give the shape...

Scorpion_016.jpg

Scorpion_017.jpg

I now need to source a jetpipe fairing - it is quite curved on the XF-89.

Ken

Edited by Flankerman
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I have started to add thin strips of plastic card to fill in the rear hole - rather like a clinker-built boat.....

Scorpion_018.jpg

I have also filled in the front intake aperture - the intakes on the XF-89 are different....

Scorpion_019.jpg

Trying to get things filled in when the under tray is not fixed in place yet is difficult - but I'm getting there.

I realised that I also need to cut off the rear of the engine nacelles to fit narrower, more conical, exhausts.

The rear of the engine nacelle is totally different to the kit - so I have had to remove the last inch or so and fit bulkheads...

Scorpion_020.jpg

.... all a bit 'slash and burn' as I go along - and all done by eye - no subtlety here.

I found a plastic knitting needle of approx the right diameter - so cut off the end and sanded it to a more curved shape...

Scorpion_021.jpg

.... a trial fit shows it to be reasonably correct....

Scorpion_022.jpg

The kits lower fuselage insert has to be cut down accordingly....

Scorpion_023.jpg

All I need to do now is glue everything in place - and fill in the holes with plastic card..

The exhausts have been reamed out and a suitable piece of brass tube fitted to improve the look...

Scorpion_024.jpg

A bit more sanding required to get a smoother curve - but its coming along...

Then I have to do the other side, then the intakes, then the nose, then the bullet fairing, then the cockpit, then the canopy..... BANGHEAD2.jpg

Ken

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The jetpipe is fitted - note the difference in the lower fuselage shape between the port and starboard fuselage halves...

Scorpion_025.jpg

Making a start on the starboard fuselage - compared to the original at top...

Scorpion_026.jpg

For the new, shorter nose, I cut side and plan profiles from thick plastic card - to establish the shape.... I left a slot ti fit a tube to take the long nose probe later

Scorpion_027.jpg

... test fitted in place....

Scorpion_028.jpg

It's all rough and ready - but it works for me.....

Scorpion_029.jpg

Meanwhile, back at the rear fuselage.... some more sanding and filling....

Scorpion_030.jpg

I think the shape is almost correct - and the gloss black finish will hide a lot of sins.....

Scorpion_031.jpg

Scorpion_032.jpg

Ken

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After adding a couple more bulkheads and filling the nose with lead shot, I roughly filled it with Milliput.....

Scorpion_033.jpg

A few sessions of filling and sanding - and the basic shape is established....

Scorpion_034.jpg

.... more filling and sanding needed yet - but its getting there...

Scorpion_035.jpg

After casting around for a suitable diameter tube to make the intakes, I resorted to butchering a 1/700 scale submarine.....

Scorpion_036.jpg

Suitable sanded to shape at the front end, they will do nicely....

Scorpion_037.jpg

.... once blended in with filler...

Scorpion_038.jpg

The nose shape needs a bit more fettling - but its coming together....

Ken

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I want my XF-89 to look as different from a production model as possible - so I'm doing it from a photo that shows the rear cockpit faired over and fitted with some sort of instrumentation (it also had a bullet fairing at the fin/tailplane junction).

With that in mind I have covered the rear cockpit with plastic card - I'll add the 'gubbins' later....

Scorpion_039.jpg

All I have to do now is to carve and crash-mould a new canopy !!!

I'm also leaving off the tip tanks - so the wingtips have been faired over with plastic card....

Scorpion_040.jpg

Ken

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I love the things you find to make the profiles you need. It's good to see some real modelling and a real breath of fresh air after hearing about people complaining about all the new unbuildable kits.

Keep up the good work, this is brilliant modelling at its best.

The cat

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Thanks for all the compliments(?) chaps......

Some more progress........

Circular section sprue to make the fin/tailplane bullet fairing.....

Scorpion_041.jpg

Main parts assembled......

Scorpion_042.jpg

Scorpion_043.jpg

I still need to add some more 'instruments' behind the pilot's seat - only a couple of photos to work from, so its mostly just made up :rolleyes:

Underside view....

Scorpion_044.jpg

I have altered the pilot's bang seat to make it look a bit like the one fitted to the XF-89.....

Scorpion_045.jpg

Finally, the new canopy is carved - ready for crash/plug/plunge moulding....

Scorpion_046.jpg

Ken

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And THATS how the big dogs run. VERY impressive. If you need me I'll be sliding my hands through a band saw...one finger at a time. Outstanding work...great googly moogly!

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The Aerofax book on the F-89 shows that the XF-89 (and early models) did not have nosewheel steering, so I removed the mechanism and added a landing light.....

Scorpion_048.jpg

Early Scorpions also only had 3 brake discs - so one was removed from the kit moulding....

Scorpion_049.jpg

Another small detail - a lot of F-89's had a spoked nosewheel - and as I couldn't find a suitable replacement in my spares box, I had to modify the kit item....

Scorpion_050.jpg

The model now has its final coat of primer.....

Scorpion_051.jpg

The instruments behind the pilots seat - all scratched from a couple of indistinct photos and lots of artistic licence....

Scorpion_052.jpg

The homemade canopy tempoarily in place - I'm quite chuffed with it....

Scorpion_053.jpg

Ken

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