A-7 Delta

[Scotaidh]

This, a delta-winged A-7 Corsair II, was on my 2018 Planned Build List - #8, actually.  I called it a "Viggen-ized" A-7.


A-7 Delta 000
Basic concept - move main wing aft to tail position as shown; move horizontal stabilizer forward to become canards.I also changed the wings' shape, with a small fillet on each side.


A-7 Delta 001
Here's the donor kit - I can't remember its origin.  I've had this kit in the SSR for longer than I care to remember.  It's made of very thick, hard plastic molded in "olive drab". 


A-7 Delta 002
The kit wing (dark green) with the flap cut off. This kit has a separate lower wing panel (with guide-holes for the pylons). A filler piece was required to fill the gap, so a template was made. I used thick plastic for the template - I was going to completely replace the lower inboard wing panel, but my thickest plastic wasn't quite thick enough. So, I used a piece of much thinner plastic and sandwiched it between the upper and lower wing panels, to serve as a locator for the two thicker panels that would fill the hole.


A-7 Delta 005
Wings together and mounted in new location, about 3/4 the original width aft of the original mounting - that patch of putty just forward of the wing root. The wings roots have been drilled and two pins (made from paperclips) superglued into place. The pins were then used to scratch their locations onto the fuselage, and a pin drill made it official.


A-7 Delta 006
This shows the triangular filler pieces in place and puttied on each wing.  There's another identical piece under each wing.  I forgot to reinforce the inside of the fuselage before I closed it up - I was worried that the wing pins might not have enough material to hold them, but it seems I worried for naught. 

[PR19_Kit]

Now that's different, and very interesting. 

Perhaps a SAAB built A-7? 

[kerick]

Now this is an awesome idea! I had never thought of a delta wing A-7. It may be too late in your build but there is as the fuselage stretch that was trialed in the A-7F prototype. About 1.5 feet before and after the wing to allow for an F100 engine. I haven't looked into this in years so my recollection may be off. Just my 2 cents worth. This will be cool either way.

[chrisonord]

Is that the kit I sent to you?

[Ed S]

Looks like a great idea and the conversion is progressing nicely.

[Rick Lowe]

So that's what the wing alteration pic you posted last year (seems strange to be writing that already...) was all about!

Have you decreased the span any? Or do the flaps you cut off still have enough length to fill the gap, even with a bit cut off for the right-angled end?

Cheers.

[Old Wombat]

So that's what the wing alteration pic you posted last year (seems strange to be writing that already...) was all about!

Have you decreased the span any? Or do the flaps you cut off still have enough length to fill the gap, even with a bit cut off for the right-angled end?

Cheers.

It looks like Scotaidh has swapped the flaps from left-to-right & right-to-left & cut a wedge out of each so that the deeper old "inner" section fits the narrower spot as the new "outer" section. The old outer ends appear to have been cut to conform to the fuselage. Doing it this way means he re-uses the old flaps without any loss of length.

I, personally, love the old SLUF too much to do something like this to her but I'm watching with interest to see how this goes.

[Scotaidh]

Is that the kit I sent to you?

Could well be, Chris.    My short-term memory for things like this is poor - my dad calls it "Early Onset GBR (Galloping Brain Rot)"

[Scotaidh]

So that's what the wing alteration pic you posted last year (seems strange to be writing that already...) was all about!

Have you decreased the span any? Or do the flaps you cut off still have enough length to fill the gap, even with a bit cut off for the right-angled end?

Cheers.

I cut out both flaps.  In the process of test fitting what went best where I may have swapped sides or simply flipped them down-side up.  Whichever it was, those are the same flaps and they're the original length.  I did have to trim off a small triangular piece at the outboard ends of each flap, but other than that, they're original.  The wings are still the original length.  I had to keep them at the shoulder to allow for under-wing stores.  I'll probably end up moving the Sidewinder rails in favour of the canards.

[Scotaidh]

Now that's different, and very interesting. 

Perhaps a SAAB built A-7? 

Well, Kit - I did once butcher a Draaken to put the wings onto a Lighting



and the sad remains of the Draaken cut me to the quick.  Even worse, it wasn't usable for anything else, and I had to scrap it.  I don't want to do that again ...   

[PR19_Kit]

Well, Kit - I did once butcher a Draaken to put the wings onto a Lighting

Oh yes, I DO like that! 

[zenrat]

Now this is an awesome idea! I had never thought of a delta wing A-7. It may be too late in your build but there is as the fuselage stretch that was trialed in the A-7F prototype. About 1.5 feet before and after the wing to allow for an F100 engine. I haven't looked into this in years so my recollection may be off. Just my 2 cents worth. This will be cool either way.

Wouldn't a stretched SLUF be a Crusader?

[major]

Well, Kit - I did once butcher a Draaken to put the wings onto a Lighting

Oh yes, I DO like that! 

Seconded! 

[63cpe]

Your Viggenized A-7 is an interesting concept! Can't wait to see it finished!

Also like the Drakenized Lightning!

What's next a J 21-ized Airacobra?

Let's Swedenize more! whatever it is!

David aka 63cpe

[Rick Lowe]

I cut out both flaps.  In the process of test fitting what went best where I may have swapped sides or simply flipped them down-side up.  Whichever it was, those are the same flaps and they're the original length.  I did have to trim off a small triangular piece at the outboard ends of each flap, but other than that, they're original.  The wings are still the original length.  I had to keep them at the shoulder to allow for under-wing stores.  I'll probably end up moving the Sidewinder rails in favour of the canards.

Thanks, that clears things up.

And the Draken Lightning looks so right.