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Northrop Gamma

Old 10-31-2010, 02:21 AM
  #1  
Kmot
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Default Northrop Gamma

Hi folks,

I am about to start another electric model airplane. This time it is the Northrop Gamma by Green Models aka Maxford USA.

This is a place holder, and later I will have more photos and build information to post.
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Old 11-01-2010, 06:21 AM
  #2  
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First impressions of this model kit are "Wow!"

This kit is very, very nice. I have been buying and building ARF's since the mid-70's and have seen lots of them but this has to be the finest engineered and built ARF I have ever bought. I'm suitably impressed.

Okay, so it comes packed very well. Every part is in a plastic bag. And every bag is taped down so it cannot move at all. You must cut the tape to remove a bag from the box. You then need to cut the tape sealing the bag shut.

The wood structure is laser cut ply and balsa. The glue is CA and epoxy. No hot glue in this baby!

The cowling, wheel spats, and center wing structure are light fiberglass and very well made. The lower part of the spats is made from ABS. Super magnets are used liberally throughout to hold the spats, the battery hatch, and the cowl.

The only portion of the model that had any wrinkles was the battery hatch. Everything else looks pretty good on initial inspection.

The empennage fits very preceisely. And so the wing as well. I dry fit all the parts and nothing was wobbly. It is scalpel precise!

The canopy comes trimmed and painted. It is the two seat version. However to build the single seat version the rear portion of the canopy can simply be cut away.

It comes with two complete sets of decal stickers to make both a 2A and a 2B version.
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Old 11-01-2010, 06:51 AM
  #3  
CHELLIE
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Wow That looks like a very nice plane can I be the first one to maiden it LOL, Take care and have fun, Chellie
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Old 11-01-2010, 01:17 PM
  #4  
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Does it have the push-pull rudder design which also connects to the tailwheel?

If so, take your time with the assembly and be sure it is 100%!
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Old 11-01-2010, 05:14 PM
  #5  
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Hi Chellie! It would be an honor. But ya gotta come up to the 'Basin.

spad: No push-pull, just a direct control rod.
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Old 11-01-2010, 05:37 PM
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Nice looking plane!

I see some items in those pics that make this look as if it comes out of the same factory as the pilot one planes that Hobby Lobby sells.

The cowl securing method and the tail wheel are identical to the ones on the Waco YKS-6.
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Old 11-01-2010, 06:14 PM
  #7  
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That's interesting Bill. You are probably right.

I was just looking around at some photos of other ARF's that are recently available and actually, they all look pretty darned good with the laser cut parts, etc. I suppose the industry in China is just that much more advanced now, and we as modelers are the beneficiaries of it.
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Old 11-01-2010, 07:10 PM
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You are right there, we all benefit for sure.

Look at the pics of my cowl, nose, and tail wheel on this Waco. Exact same setup.

http://www.wattflyer.com/forums/show...42&postcount=1
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Old 11-01-2010, 10:51 PM
  #9  
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Originally Posted by Kmot View Post
Hi Chellie! It would be an honor. But ya gotta come up to the 'Basin.

spad: No push-pull, just a direct control rod.
I might just do that one of these days and make a day of flying out of it Take care and have fun, Chellie
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Old 11-02-2010, 02:06 AM
  #10  
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Bill, same for sure.
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Old 11-02-2010, 02:26 AM
  #11  
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Okay, so yesterday evening I did the majority of the assembly. Everything went smooth. I did have an issue with the aileron servos and the servo horn slots. Purely a function of my choice in servos, I am sure. But the slot was too low and so I had to file it open slightly.

The manual calls for the ubiquitous epoxy glue for the tail feathers. However, because of the tight, precise fit of the parts I knew that any epoxy glue I applied would just be shaved off and squeezed out and make a mess. So instead I fit the parts and then wicked in some thin CA. Worked great.

This model is so precise, that even the small hole for the tailwheel rod lined up perfectly with all the places it had to go through to exit outside the fuselage.

The motor I bought has an X mount but it would not fit inside the motor box. However, the motor box was drilled so that it could have the motor attached directly to it and screws run through from behind. I used some flat head screws and countersunk washers I had on hand. I later realized that included in the hardware pack with the model airplane were the washer head motor screws.

The wings get attached, and then secured with tape. The tape is provided and is silver to match the covering.

Then the wheel spats are put into place on the wing, and the bottom spats are then put on. They self align themselves to the landing gear, at which time some screws are put in to secure it all. Very clever!

Installing the servos in the fuselage is a tight squeeze for someone like me with stubs for fingers, but thankfully the laser cut precision of everything means it all pretty much drops into place.

The hardware included in the kit is all good quality stuff. I used it all. None of that soft, thread stripping stuff like I have seen in the past.

The plane is almost complete. I need to paint up the pilots, attach the canopy, and then apply the decals. Then she will be ready for flight.
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Old 11-02-2010, 02:33 AM
  #12  
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More....
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Old 11-02-2010, 02:35 AM
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Looking good keep up the nice work, Chellie
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Old 11-02-2010, 02:38 AM
  #14  
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And yet more...
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Old 11-02-2010, 02:38 AM
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Thanks Chellie.
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Old 11-02-2010, 02:45 AM
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OK, OK Just Kidding LOL
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Old 11-02-2010, 05:52 AM
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mmm, skewered kitty....
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Old 11-02-2010, 08:49 AM
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Originally Posted by Kmot View Post
mmm, skewered kitty....

Poor Kitties
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Old 11-04-2010, 01:20 AM
  #19  
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Couldn't get any work done for a few days because my inlaws were here. Now that I have my dining table,....er.... building table back I did something today.

This post is mostly about my prowess applying stickers.

I decided to make it a 2A version because I liked the colorful Texaco livery better than the plain vanilla Polar Star livery.

I like to trim the stickers close to the graphics edge so that there is less of the clear sheet showing up on the model. Most of the time I can cut the graphic out completely and eliminate all the clear. But with letters and numbers it is not possible. Still, I trim a lot of the clear sheet away. For example, the registration number. The ones seen the most, IE when the plane is just sitting on a bench or the ground, are the upper surface stickers. So I trim them pretty severely. But one must be extremely careful when removing the backing and sticking it onto a surface because they can tear. The number sticker on the underside of the wing I trim, but not as aggressively.

So, the stickers are done.

I attached a propeller today, and when I tested for amp draw the ESC would instantly go into LVC mode. My battery is not good enough, so I have ordered a pair of new batt's.

That's all for now.
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Old 11-04-2010, 01:45 AM
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Kmot as usual great job this will be a nice addition to your hanger. I keep finding myself looking at this plane when ever the Maxford banner comes up. It is one slick looking bird and the landing gear shroud is unique.
Nice work with the stickers, and I am looking forward to your maiden when the new batteries come in.
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Old 11-04-2010, 03:28 AM
  #21  
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Thanks Gramps!

You know, today is the first time I took it out in the sunlight. The photo is waaaay toned down, but in the sun the silver sparkles like crazy! It looks soooooo good!
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Old 11-04-2010, 01:36 PM
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You can trust your car to the man who wears the star....
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Old 11-05-2010, 06:11 AM
  #23  
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"The big, bright Texaco star!"

Heh-Heh

I got my Williams Bros 1/12 scale pilot figure painted today. I painted the inside of the cockpit area a charcoal color to darken it up. I had to glue some blocks to the underside of the pilot figurine to raise it above the control rod tube.

You only get one shot to trim the canopy. This always make me nervous. If you screw up, yer screwed!

I trimmed it close and then finished it off with a Perma Grit flat sander.

I glued the pilot in position, and then attached the canopy with some Formula 560 canopy glue and taped it down while it cures.

Just waiting on batteries and then it's time to fly.
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Old 11-05-2010, 01:34 PM
  #24  
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Default Wow! Nice!

Hey Kmot,

Looking forward to see your Maiden Flight results and good luck!

Great looking model!

Carlos
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Old 11-05-2010, 09:59 PM
  #25  
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Thanks Carlos.

Well, the model is now pretty much completed.

About the hardware, there was one part of it that didn't make sense to me. The nylon control rod keepers. I have used these in the past and they always have a split body so that you can snap it over the control rod. These did not. Perhaps they were supposed to be slid over the control rod before a 90 bend was made, I dunno. But even if so, I do not like that method.

I was going to go to my LHS and buy some Dubro micro keepers but I figured I could just modify these to work. So I did. I used a thin kerf saw and slit the body. Mission accomplished.

I'm not too sure about my prop either. On hand I have a wood Turnigy 10x6E and a plastic APC 8x8E. I will probably have to go buy a couple of different sizes to try out.

Anyways, I took some beauty shots this morning in my usual spot.
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