Jump to content

XF-89 Scorpion Prototype


Recommended Posts

I am having a go at making the XF-89 prototype of the Scorpion - using the Hobbycraft F-89B.

The 'committee' have discussed this here.

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 - so wish me luck :woot.gif:/>

Ken

Link to post
Share on other sites

Let the butchery commence........

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.

All this butchery is quite therapeutic - it's all a question of cut and fill by eye so far.

Ken

Link to post
Share on other sites

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

Ken

Link to post
Share on other sites

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 curved shape...

Scorpion_021.jpg

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

Scorpion_022.jpg

The 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..... :bandhead2:

Ken

Link to post
Share on other sites
  • 2 weeks later...

My computer got hacked - so I've been 'off air' for a week.....

While it was being sanitised, I did some more bodging.....

The jetpipe is fitted - note the difference in the lower fuselage shape...

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....

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

Link to post
Share on other sites

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

I have even had the foresight to fit an aluminium tube to take the nose probe later - not like me at all :woot.gif:/>

More anon....

Ken

Edited by Flankerman
Link to post
Share on other sites

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

Link to post
Share on other sites

Thanks for all the encouragement guys - it really helps :thumbsup:/>

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

Link to post
Share on other sites

Stark raving wonderful!!

But, as TT said, where do the red stars go?? :lol:/>/>

Hmmmmmmm.....

According to a photo caption in Detail & Scale....

"The black XF-89 was the first Scorpion to fly, and ironically it played the part of a Soviet fighter in Howard Hughes' movie Jet Pilot starring John Wayne and Janet Leigh"

So, if anyone has a photo........ :whistle:/>

Ken

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...