Author Topic: Northrop N-9MA  (Read 19870 times)

Offline LemonJello

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Northrop N-9MA
« on: December 01, 2014, 12:46:24 AM »
Alongside my HMX-1 VV-22, I've started another little project.  This is Sword's 1/48 N-9MA but I'm making it an operational aircraft - I'm planning to add a pair of 20mm cannon and 4 to 6 .50cal machine guns.  Most importantly (to me), this is going to be my first attempt with Alcad paints to give it a NMF finish (I have Dark Aluminum, White Aluminum and Duraluminum in the paint rack, waiting).  Unusual for me, this one will have a pilot in the office since I am also using a set of Alliance Modelworks Dynamic Propellers to simulate running engines/turning props.

Not a lot to show right now, but I've gotten the 20mm cannon barrels made from brass tube and I'm adding shell ejectors and gun gas vents to the underside of the fuselage.  The .50's will go further outboard in the wings.  I've been debating adding drop tanks as well, but don't have any suitable ones in the spares box (I was thinking P-51 tanks would be about right). 

Anyway, here's a starter pic.  Updates as the project progresses.





Updated 11/30/14
Today's progress report:

Shell ports and gun vents close up-


Boxing in main wheel wells-


Our intrepid aviator in his office-
« Last Edit: December 01, 2014, 05:37:42 AM by LemonJello »

Offline raafif

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Re: Northrop N-9MA
« Reply #1 on: December 01, 2014, 11:08:21 AM »
looking nice - I was going to finish mine in an operational scheme too.

Make sure you test fit the cockpit assembly to fuselage, wing halves & wing-to-fuselage joins often :)

Offline Brian da Basher

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Re: Northrop N-9MA
« Reply #2 on: December 02, 2014, 04:05:02 AM »
Oh yes, Mr Jello this will be quite a stunner! I'll be watching with great interest! Given your super-human talent with AFVs, I think we're all in for a treat!

Brian da Basher

Offline kerick

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Re: Northrop N-9MA
« Reply #3 on: December 02, 2014, 10:07:02 AM »
I trying to think of how to add a couple of Merlins or radials.

Offline jcf

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Re: Northrop N-9MA
« Reply #4 on: December 03, 2014, 01:13:14 AM »
I trying to think of how to add a couple of Merlins or radials.
You'd need to scaleorama, there simply isn't the room, the N9M isn't very big.

"Evil our grandsires were, our fathers worse;
And we, till now unmatched in ill,
Must leave successors more corrupted still."
Horace, 65BC - 8BC. Marsh translation.

Offline kerick

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Re: Northrop N-9MA
« Reply #5 on: December 03, 2014, 03:23:02 AM »
I was thinking about using 1/72 engines and cockpit on the 1/48 kit. Then add rockets and 20 mm

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Re: Northrop N-9MA
« Reply #6 on: December 03, 2014, 03:56:38 AM »
I trying to think of how to add a couple of Merlins or radials.

Not sure about a couple of engines, but for something different you could give it one engine (say in a beefed up central area) and have the props driven remotely.

Even a single Merlin (or perhaps Griffon) would be a boost.  After all the real world N-9 only had 2 × Menasco C6S-4 "Buccaneer" 6-cyl. inverted air-cooled in-line piston engines of 275 hp (205 kW) each or, in the case of the N-9MB, 2x Franklin XO-540-7, of 300 hp (224 kW) each.  Therefore, say a Packard Merlin 61, of between 1,290 hp (962 kW) and 1,580 hp (1,178 kW) depending upon situation will still far out-power the combined 450hp - 600hp of the real world aircraft.  Even factoring in for some transmission losses.
All hail the God of Frustration!!!

Offline kerick

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Re: Northrop N-9MA
« Reply #7 on: December 03, 2014, 05:40:38 AM »
Maybe a little more of a fuselage, P-39 style with a pusher prop or props. Enough thread jacking. Here's to seeing more of the N-9M!

Offline LemonJello

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Re: Northrop N-9MA
« Reply #8 on: December 03, 2014, 05:47:43 AM »
I'm enjoying the discussion immensely, so no worries about thread jacking here.

I had started to wonder how to make some mods to suggest larger engines before I started this one, and I'm still pondering options.  At first, I was looking for cheap P-51 kits (1/48) to chop the Merlin noses off and graft them onto the N-9.  Now, I'm looking more at just beefing up the areas around the prop shafts to represent larger engines installed.  We'll see how it all pans out, I don't want this to devolve into a "stash queen" that never gets finished.

Also, I have a second kit that I'm going to modify/convert to a kerosene burner, because I can. (Well, at least I can give it a shot.)

Offline kerick

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Re: Northrop N-9MA
« Reply #9 on: December 03, 2014, 06:04:21 AM »
Oh boy! That's sounds good to me!!!

Offline finsrin

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Re: Northrop N-9MA
« Reply #10 on: December 03, 2014, 06:52:31 AM »
You'd need to scaleorama, there simply isn't the room, the N9M isn't very big.
Yup, zactly what to do.  1/48 N-9MA is good kit for us 1/72 builders.
Can be flying wing of more substance.

Offline Acree

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Re: Northrop N-9MA
« Reply #11 on: December 03, 2014, 08:18:58 AM »
You might try the HobbyBoss Easy Assembly P-51s - they're pretty inexpensive and pretty well detailed.  I've chopped up a couple myself.

Chuck

Offline elmayerle

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Re: Northrop N-9MA
« Reply #12 on: December 03, 2014, 10:40:03 AM »
For the kerosene-burner, I believe Sharkit does a conversion, but I don't remember if it's 1/72 or 1/48.

Offline jcf

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Re: Northrop N-9MA
« Reply #13 on: December 03, 2014, 02:59:03 PM »
The N-9M-B was powered by two 300hp supercharged Franklin XO-540 horizontally opposed 8-cylinder engines.

So if you want to increase the power think along the lines of continuing with a pancake engine, that
way the bulk of the engine stays within the wing envelope, perhaps with two-stage supercharging or
turbo-charging to increase power also bearing in mind that if you go water-cooled you'll have to figure
out radiators etc.






"Evil our grandsires were, our fathers worse;
And we, till now unmatched in ill,
Must leave successors more corrupted still."
Horace, 65BC - 8BC. Marsh translation.

Offline LemonJello

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Re: Northrop N-9MA
« Reply #14 on: December 03, 2014, 09:01:57 PM »
For the kerosene-burner, I believe Sharkit does a conversion, but I don't remember if it's 1/72 or 1/48.

Evan, I just checked their site.  It's a 1/72 conversion, but it does give me some ideas as a starting point! 

Jon, thanks for the suggestions, looks like I'll be doing some additional work on the upper wing along the existing engine/drive shaft.