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Desert Storm Air to air refuelling: KA-6D & A-7E


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#76 Finn

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Posted 12 June 2017 - 04:37 PM

I think in order to save weight they took two of the pylons off, one on either side and only the inboard and outboard pylons are plumbed for fuel so they kept one of the inboard pylons one in case they needed to add a fuel tank. Most likely the range to the target meant the number of bombs loaded so 8 seems to be the maximum number. The ones on 312 and 301 are Mk-83 1,000lb bombs with Mk43 fuzes for airburst. Some a/c had all 6 pylons left on so it is best to check which a/c # you are doing to see how the pylon situation was. For a listing of what the bomb loads were for VA-46 check here:

 

http://collections.n...tions/Query.php

 

in the pages in the link where it says fuel 12.2 indicates 1 external fuel tank and 10.2 means no ext fuel.

 

Jari


Edited by Finn, 12 June 2017 - 04:43 PM.

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#77 Finn

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Posted 13 June 2017 - 03:42 AM

Here are some details on the KA-6D, they carried chaff/flare dispensers, note the empty housings forward of the refueling housing in the first pic during a non combat mission. What load they had during the war is unknown, probably all chaff as they most likely they remained on the friendly side of the border. Also the red lights are on which probably indicates no fuel flowing since no hook up yet:
 
 
contact, green lights, fuel flowing:
 
 
Jari

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#78 red Dog

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Posted 13 June 2017 - 02:48 PM

Thank you Jari, very useful information.

Make sense about the wet pylons, i was wondering what kind of yaw trim such an asymetrical load would require?

regarding the intruder, very useful info as well, i noticed that there are red lights also on the rear outboard pylons

great details, thank you
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#79 red Dog

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Posted 15 June 2017 - 08:01 AM

the next challenge wasn't expected :)

before painting i need to close the canopy.
but it seems the zacto's canopy wasn't meant to be closed, it's too long and conflicts with the glareshield.

A6A7_063_A7_canopy.png

first scary moment, but that one is usual, was to separate the canopy from the support. My usual procedure for that is to use tape to mark where i need to cut and
using a brand new blade, i make mutliple light passes until the blade go through. patience and slow motion required.

A6A7_064_A7_canopy.png

the problem gets worse when the black box glareshield is positionned. I tried the kit's part as well, it's slighly better but not perfect.

A6A7_065_A7_canopy.png

A6A7_066_A7_canopy.png

placing the vacformed canopy illustrates how big the step actually is without pressure,

A6A7_067_A7_canopy.png

to try to make the fit better, I modified the windscreen structure by shortening it a bit and lowering it to leave enough thickness for the vacu formed part.
I also modified the Black box glareshield to allow the front windscreen structure to be lowered into it (sorry for the blurry picture)

A6A7_068_A7_canopy.png

A6A7_069_A7_canopy.png

The joint between the nose and the vac canopy is now better and the canopy should be flush with the nose.
I still have the side issue to solve where the glareshield push too far outward the windscreen structure. That probably lower the top of the windscreen, creating that step between the tilting canopy and forward windscreen.
I'll need to adjust the glareshied accordingly so it doesn't touch the windscreen structure.
I also thing that i'll lower the pilot just a bit more for more clearance. because if the helmet touches the canopy, that's also a reason why the forward windscreen won't be flush.

I guess it's not a problem that arise when zacto's part are used for an opened canopy as in most cases.
I may have screwed up somewhere too and i'm really concerned having to bond that canopy strongly. Usually dealing with vacu formed canopy, the more natural rest, the better. If you have to pressure glue them, it's not good.

More to come, thanks for looking
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#80 ClumsyDude

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Posted 15 June 2017 - 08:45 PM

Dude, awesome work ... looks great.

Jim

#81 Finn

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Posted 15 June 2017 - 09:00 PM

Good recovery with the canopy windscreen fit, this pic shows how it looks on a real one:

 

http://collections.n...a.php?irn=14626

 

and this one:

 

https://catalog.arch....gov/id/6467770

 

Jari


Edited by Finn, 15 June 2017 - 09:05 PM.





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