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02/15/25 A look at the Underwing Flap details on Great Wall Hobby 1/32 P40

Great Wall Hobby P40 1/32 scale wing details

When I first received this kit when I started to read through the instructions, I was immediately drawn to to the main wing flaps. I noticed that all of the structure of the flaps was photo etch and each piece seemed that it involved some very hard bending. The Photo etch on that comes with the Great Wall Hobby P-40 (GWH) is very thin and thus you get maybe two attempts at a bend and after than the piece will separate. Their instructions show little arrows along each piece which is how you are supposed to bend the parts but I found that the arrows and directions were less than stellar. You also have one long piece of plastic that is to help support the lower flap when opened. I assume it’s an actuator arm. For each side of the wing, you have 8 different parts that have to be added. There are a few issues, the main one being that it’s very hard to hold the parts once they have been bent since due to the folds you cannot get your tweezers around them without resending the folds back over. You can take a look at a few of these parts in the image below.

Flap parts individual
Individual main wing flap supports

Once you have all the various piece folded you can line them up along the wing to attach them. Here I ran into yet an another issue in the alignment. Make sure you allow for the large single piece of photo etch that sits on top of 3 of the supports. If you don’t have the correct alignment, this piece will not look correctly placed. In the gallery below you can see many different viewing angles of the parts in place on the wing. Click on any image to start a Lightbox gallery for better viewing. Also if you are viewing this article on an iPad or iPhone you can pinch to zoom into the images for more details.

I had planned to use Ultra glue to attach these parts to the plastic. Ultra glue is made by “Ammo by Mig” and is an excellent glue for photo etch. However the pieces need to be able to fit flush with no resistance as the glue does not have an instant bond. Instead I had to use Cyanoacrylate (super glue) to get the parts to stick in place. This was a bit tricky since you have to make sure you have the correct alignment before you stick the part. If your alignment is off, it’s best to use the cyanoacrylate debonding agent, pull the part off and start again. My finished effort is not perfect, but I am overall pleased with the final look.

Great Wall Hobby P-40 1/32 Underwing Flap details

I have moved on with the GWH P-40 by finishing out the flaps on the wings. The kit has only Photo etch for the details and this is by far the trickiest part of working with the model. Click on any of the images below to start a Lightbox gallery for better viewing.

The Photo Etch from Great Wall Hobby is very thin to start with. The sheet that all of the photo etch comes on is slightly curved so all the pieces depending on size will need to be flattened. The individual parts for the main wing flap support required by far the most complicated bending. NOTE, due to the very thin nature of this photo etch, you can get by with one re-bend but after that the part will separate. Each of the upper wing supports for the main flaps are lined up over the flap actuating rods. You can see these in the pictures in the gallery.

I first tried to use Ultra Glue to hold each part down since I knew that if I used CA I would only get one try to locate these parts. However the ultra glue did not hold well since it has a longer drying time and the flap actuating rods pushed up on the photo etched parts. I also started locating the individual supports in the wrong orientation. This become critical when you attempt to place the single large photo etch covers over them. NOTE, I believe that Great Wall Hobby made a mistake with these covers in that they made them exactly the same and they should be mirror images of each other. When you attempt to mount the part on the right side, you will find that it will not fit unless you turn it upside down, but then you lose all of the extra details in the photo etch. In the image below you can see where I had to drill a hole into the part to get it to fit. This part and the part on the left are identical, not mirrors of each other.

Close up of upper right wing support showing error in design

The individual part themselves are very tricky to work with as you are bending the top, bottom and side. Also once you have bent all of the top, there is nowhere to hold the part as you are placing it. I ended having to straighten the back top where it bends down to hold the parts.

The actual flaps also have photo etched pieces that need very careful bending, however they are much easier to place on the plastic since they are less complex in nature.

Individual main wing flap supports

One last photo to show the individual supports. Here you can see a bit more of the complex amount of bending that is required. Also note, I feel that the instructions are not very clear on how these parts are to be bent. The drawings are a bit vague so when you get to this stage of your build slow down and really look at the image of the final part on the instructions.

Great Wall Hobby 1/32 P-40 Wing Details

I am slowing working forward on this kit. I wanted to show some of the finer details of the wings. The actual rivet details are about the best I have seen on any 1/32 kit. They are recessed but very fine and I would assume very close to scale in size. In reality, these rivets would be raised ever so slightly but when working on a model it’s very easy to sand down raised rivets while assembling the parts. You really can’t replace a raised rivet, it is possible with tools to re-draw recessed rivets if you happen to fill them by accident. In the galley below you can see various views of this kit’s wings. Click on any image to enlarge and start the Lightbox to view all of them.

On issue I had was with the ammo bay covers. You have the option to show these open or closed. I choose to leave them closed, however you still have to place both covers over the opening. The photo etch is very thin and slightly curved when it comes off the main photo etch sheet, so placing them in the exact location was not easy.

Used Ultra glue by “Ammo by Mig” to place these pieces. I knew that if I tried to use CA glue I would have problems since that type of glue would bond the photo etch to the plastic immediately. So if I happened to position the pieces incorrectly removing them would have been a problem. I placed the inner doors first, let them dry overnight, then placed the top door. Getting the inner door placed was the biggest problem as you don’t have much of an inner lip to put the part.

Ammo bay door for Great Wall Hobby P-40
Close up of ammo bay cover

Not the best picture, you can see the very fine recessed rivet detail on this wing and the ammo bay door in place. The opening above the ammo bay door is for the 50 caliber machine gun.