Basically, the B-25G was a developed after an experiment by Capt. 'Pappy' Gunn and North American tech representative Jack Fox to install a 20mm cannon in the nose of one of Gunn's B-25C strafers. The installation was a lash-up, but the results were quite promising. This encouraged NAA President 'Dutch' Kindelberger to do a production version with a 75mm cannon. This adaptation of the standard 9 1/2 foot M4 75mm field gun was first tried out on a B-18 'Bolo'. Upon successful completion of trials, it was put into a B-25C (41-13296), which became the first B-25G-NA. Eventually 306 B-25Gs were built, with B-25G-10-NA (42-65128) being the last one built.

Many B-25Gs were modified in various ways. Though designed for two .50 calibre machine guns in the nose, many had four mounted. Also not always used was the belly turret. In fact, other than the one used by at Eglin for trials (42-64758) and painted in the sea search scheme of white undersides, the author could not find a photo of another B-25G with the belly turret. Interestingly, the particular plane, which is one of the two decal options in the Accurate Miniatures conversion set, does not have the serial number of a B-25G, but of a B-25C-25 NA! Another option that was installed in some G models was an enclosed tail gun position with twin .50 cal machine guns.  Later G models also had modified beam gun installations as seen on the B-25J. A cannon nosed version of the B-25J, the B-25H, was also developed.

I'll direct you to Tom Cleaver's fine preview of the B-25B as that is what constitutes most of this kit.

It is weird to think that as much as I like Accurate Miniatures kits, this is actually only the third one I have built, the previous kits being the P-51 and the Yak-1b. Both were quite nice kits. Not Tamiya nice, but still quite nice. Somehow, I got more B-25Bs than I really wanted, and it was with much relief when I heard that AM was doing the G version as a conversion set. You can see the review of the conversion set to get an idea of what is in it.

Accurate Miniatures recommends slavishly following the directions when assembling this kit. AM kits have been known for their tight construction, and the Mitchell appears to fall into that vein. The first things that I did were to glue as many of the parts that were going to be the same color as I could onto the various interior subassemblies. Once this was done, I set them into the two fuselage halves and used them as masks. Then I spray painted the various large areas. Sure beats using tape to mask and it worked quite well as you can see from the image.

Next, I started attaching the various bits and pieces to the cockpit and bomb bay section, as directed by the instructions. AM provides instrument decals for placing on the rear of the clear instrument panel. A nice idea and one that works rather well. They also provide seat belt decals. It seems like these bombers must not have had shoulder harnesses; either that or they were not included as decals. There are also a plethora of items that need to be attached to the inside of the fuselage, including a chemical toilet! Since I was doing a G with twin 50s in the tail, I added the gun mount. There are no other pieces for the tail gun set-up and an e-mail to Accurate Miniatures about it brought the response that it was a mod done at local or depot levels and they had no information on what it looked like. Fair enough.

Once the interior bits and pieces were added, the fuselage and inserts were given a wash with oils. Then they were drybrushed with aluminum. Just a reminder at this point to make sure that the holes for the pilots armor plating are opened before the cockpit is installed. During all this, the upper turret was constructed. Photo information on the lower turret for the B-25G is inconclusive. If doing the 'sea search' scheme, put the turret in as there are photos of it being there. If doing the version that I am building, leave it out. From what I can tell, there was no lower turret in this aircraft. Regarding the upper turret, I was unable to cleanly get the guns to 'snap' into place. Instead, the bar between the two guns is what snapped and I had to glue the guns to the sides of the shell chute. Not a very pretty sight! The turret canopy must be glued to the turret when it is installed. The turret assembly cannot be inserted after the fuselage is glued together and it is the canopy that seems to hold it in place.

While all that washing and drybrushing was drying, I turned to the wings and tail. These assemblies were glued together with very little trauma. I then glued the engine nacelles together and fit them to the wings. The fit here is not perfect so you will need to use some filler on the join and the nacelles. I used some on the wings themselves as well, but not much. AM has taken to following R-M's practice of having their initials on the underside of the wing. They are easy to remove.

At this time, one should start putting in the fuselage transparencies. They all fit very well; the best I have seen . As a side note, the windows behind the cockpit should be flat. There are others that are bulged, but I have seen no photos of B-25Gs that have these bulged windows. Now I'm sure that I will be flooded by letters and images showing the bulged windows!

I then returned to the interior. It seems like I have all the bits ready to go and so I started gluing in assemblies. The instructions state that the bomb bay section must go in first to allow the cockpit to fit properly. I did so. Then the cockpit section was glued in place. It just didn't want to fit well. The 75mm gun kept getting in the way. It was to my embarrassment that I realized that I had installed the gun upside down. A bit of cursing and prying finally got the gun turned around and everything fit well. You will also have to glue the nose gear in at this time. There is just no way to install it after the fuselage halves are glued together. AM provides a paper painting mask for the nose gear which is quite thoughtful.

About this time I read a number of articles and comments from newsgroups concerning the kit. Amongst the more lengthy lists of what was wrong with it (it seems some people will complain about every little detail), it seems that there were rather vociferous damning of the engine cowlings. Frankly, they look a bit small to me as well. Apparently AM got the opening diameter wrong and they should be larger. Rather than spend the money on an expensive resin replacement, I just got a nice piece of 180 sand paper, rolled it up, stuck it in the cowling and twisted it around a few times. In no time at all, larger cowling openings! Really couldn't be simpler and a much preferable option than spending more money on what is already a rather expensive undertaking. Just to add to all this, it seems that the G model had armor plating around the seats as well as in the back. You will need to add that yourself if you so desire.

Returning back to the fuselage, the nose compartment was painted as were the various bits. One interesting note is that a lot of photos of the B-25G show that there are four 50 cal machine guns. Yet there are others that show only two as is given in the kit. I would imagine that one of these options is a field modification of some sort. 

Anyway, construction had gone far enough to start to dry fit the bits and pieces into the fuselage and then see how things fit. Another modification for the G is to install a rack for the 75mm shells. The gun itself is hand loaded so there needs to be a place to fit the shells. This goes on the left side of the fuselage. When fitting the fuselage halves with the various interior assemblies in it, I found they wouldn't fit. The problem is the shell rack. It juts out into a space already taken up by some other 'stuff' in the interior that is mounted on the bomb bay assembly. The instructions don't seem to mention this. There are two possibilities. One that I have the rack mounted in the wrong place, but it doesn't seem to want to fit anywhere else. Two is that I have to remove a piece and that isn't mentioned in the instructions. What I ended up doing was removing a small section from the bomb bay assembly in order to have it clear the shell rack. Took about a minute. Hope it wasn't anything too important!

Test fitting continued and it looks as if all will fit just ok, though it may require some additional fiddling and probably some filler. One thing that I don't see is where to put the nose weight. AM went through great lengths to provide nice brass weights for the B model, but those fit in the B nose and there isn't room in the G for them. 

Once the interior is complete, there is nothing left but to say goodbye to most of the interior detailing as you won't see it again, and to glue the fuselage halves together. The fit of the fuselage halves wasn't the best and I needed some filler on the fuselage seam. There are also a few sink marks near the alignment pins.

I tried to put in the upper turret before gluing the halves together, but had problems with the turret. I just couldn't get the clear part to fit properly and the guns kept breaking loose from their mount (remember, they broke during installation and so had to be glued). I ended up leaving the turret off and will deal with it later in the final construction steps.

Once the fuselage was glued together and puttied fairly well, I attached the horizontal stabilizer. This fit very well. Then it was on to the nose. Here I had problems. First of all, the brass weights are for the longer nose and so most of them are unusable for the G model. I was able to use the ones behind the instrument panel without any trouble so that was helpful.

Then it was time to fit the new nose. Bad news here, folks as it just wasn't a good fit. In fact, I ended up aligning everything to the left fuselage side so I wouldn't have to do any filler work around the add on armor plating. This left a lot of stuff sticking out on the top and right side that will have to be filed smooth and then filled. Story of my life, I guess. There was also the problem of nose weight. Since it was obvious that I wouldn't be able to have the upper gun bay open, I removed the nose guns and filled that space with lead weight. Then the upper nose section was glued on. As you can see from the image, I have my work cut out for me on this one.

Biting the bullet on this one, I grabbed my files and filler and went to it. It took several coats of filler to finally get things smoothed out. Of course, in the process, I wiped out most of the nice detail in that area. This was looking more and more like, 'one of those kits', where I have tons of trouble, end up with a nice looking model and then put it in with the collection where it never sees the light of day!

While all that stuff was drying on the nose, I went to the other end of the kit. The lack of info on the rear gunners position had me stymied. One thing was certain, I had to do something about the rear transparency. Even with the back of it painted, one would easily be able to see the bare, naked glue attachment join for the horizontal stabilizer. Something had to be done. What was done was that I made a small bulkhead out of plastic card and glued it just where the windows stop. This will effectively hide that nasty mess back there! Took about five minutes.

Next, the wings were attached. These fit very well indeed with no hassles at all. I did them one at a time and gave them plenty of time to dry. Once the wings were dry and the nose smoothed out, I paid attention to the engines. These were painted black and given a silver dry brushing. The block and gear housing was painted a dark grey and the wiring harness painted according to the kit instructions.

Meanwhile, back at the rest of the kit, the engine intakes and cowl flaps (which are what the engines are glued onto) were attached to the nacelles. The fit was fair, but needed filler with the intake bits not fitting as well as I would have hoped. At this time, the decision was made to have the fore and aft access ladders in the up position. This was mainly because of the ejector pin marks that would be impossible to remove and because it looked a bit cleaner. The turret blanking plate was also installed at this time. Fit is not bad. If you are going to install the turret plate and the hatches in the closed position, it needs to be done before the area is totally sealed off. I had to insert the hatches from the inside in order to get them to fit properly. I also needed to hold them in place with a paint brush handle while I glued them in. 

Once all the hatches were secured, it was time to do some work on the front of the plane. This was involving the engines and cowlings. The engine cylinders were glued onto the mounting points minus the crankcases. Then the individual exhaust stacks were cut from the sprues and glued onto the engine cowlings. This really was a no brainer and pretty easy to do. The result looks quite good. Then the cowlings were tacked on using white glue. 

Things were coming together well and the final major airframe bits to be added were the tails and tail plane. Fit here was very good. The next step was to do a bunch of masking. The kit includes some precut masks but they are really too large. Since I was going to have to trim the masks anyway, I resorted to Tamiya tape to do most of the masking. A bit of a note on the cockpit canopy. You need to use the one that includes the armor plating on the pilot's windscreen. This means that you don't use the one for the B-25B. Take a look at the canopies on the sprues and you'll see which one I mean. It is part #108.

Once the clear bits were masked, the bomb bay and other holes were stuffed with tissue. This included the engine cowlings. By leaving off the crankcase part, it is much easier to fill with tissue. It was now time to head to the paint shop for the first coat of paint.

Well, painting was a rather non-event. The first thing done was to paint the underside in Neutral Grey. This was done using Aeromaster enamels. When dry, the upper surfaces were painted with Olive Drab, also an Aeromaster enamel. Next the demarkation lines between the two colors were masked and given a hard edge. Once dry, I used the Neutral Grey and lightly went over the hard demarcation lines to give it a more freehanded look. This may sound like an odd way of doing it, and why not just freehand it in the first place. Well, for me, it was much easier to have a guide and the results are pleasing. Then the wing and tail blotches were done in Medium Green, again using Aeromaster enamels.

The cowlings were glued back in place and the props were pushed onto the shafts. Only some fiddly bits to add now. Turning to the back of the plane, I glued in the tail guns. A 'canvas' cover was made from tissue soaked in thinned white glue and painted OD when dry. Looks convincing enough. Then the DF loop was installed. The nose guns were cut off of the gun/box assembly and glued into the slots in the nose (if you recall, I needed to fill the nose with weight to keep the kit from tailsitting so glued the nose shut). The pitot tube was glued onto the wing. Looking at the photo at the top of the page, I needed two more antennas installed. The addendum page in the conversion set says nothing about these. The holes were drilled and the antennas installed. Final thing were the covers to the landing lights and these were glued in after the last touchup with paint and the matte clear coat sprayed on.

Now to the final bits. First, all the masking was removed from the various clear parts. The kit supplied bits I used were the most difficult to remove, but also fit the tightest. I had a bit of bleed through on the upper eyebrow parts. That was removed with a sharpened toothpick. I also used Micromask to fill in the missing window in the back as there was no way I could get the darn thing back in.

The exhaust stains were added by using pastels. When done, those were fixed in place with a quick spray of clear matte. Then the wingtip, tail, and formation lights were painted using various colors of clear and white. That was it! Another B-25 to add to the collection!

Final note: I found a lot of problems with the instructions for the B-25G conversion. These instructions are geared to those who have the B-25C/D kit. Like many of you, I used the B-25B as a basis for the conversion. Hence the instructions left out a lot of things that need to be changed. Why the instructions didn't assume that there would be those of us using the B model is a mystery.  Maybe it is just me, but I found the kit a bit more trouble than I would have supposed. True, there are a LOT more pieces than in the other AM kits I have built and it is one that does require precise construction. Perhaps this increased precision worked against me. I will definitely build several more AM Mitchells over the next few years, but not for a while, yet!

 In the three months that it has taken me to build this kit, Accurate Miniatures has published a fix for the instructions and posted it on their website. I heartily encourage all who are using the B-25B as a basis for this conversion to go to http://www.accurateminiatures.com and copy that page. It will save you a lot of frustration. 

Deadly Duo: the B-25 and B-26 in World War II by Charles A. Mendenhall, Specialty Press, 1981
Aero Pictorials 2: U.S. Army Air Forces in the Pacific by Rene J. Francillon, Aero Publishers, 1969. 

January, 2001

Review kit and conversion courtesy of me and my wallet!

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