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Royal Ki-61 Build

Old 01-15-2020, 12:50 PM
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Mtthwacrss
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Default Royal Ki-61 Build

Okay I have started my build. This is going to be along build for me. I am a slow builder on a good day and this Kit is old and there will be a lot of looking and making sure I am doing it right before I glue stuff. first pic shows started and have R2 to R1 and have also glued V2 to V1. I have also spot glued the rudder to the fin so it is ready to sand to shape. I hate sanding and there will be a lot of that on this plane. Pic 2 shows the Horizontal Stab Laid out for glue. More to come on the build
I have also attached accouple of possible color options. Feel free to chime in and let me know what you all think and if you have any tips or suggestions.








Old 01-15-2020, 01:35 PM
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Matt which color scheme are you going to use captured US or the original Japanese livery?
Old 01-16-2020, 06:44 AM
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I haven't decided on the color scheme yet. These are two of the ones I am thinking about. I have several others I am considering also. I will post some more from time to time. If anyone has one they like feel free to post for me to check out. here are accouple more.



Old 01-16-2020, 07:56 AM
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That first one would be a good candidate to try out AeroFoil or FliteMetal. The Ki-61 sure had a lot of panel lines though.
Old 01-16-2020, 08:43 AM
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I always liked the home defense squadron color schemes if you are looking to something colorful.
Old 01-21-2020, 01:29 PM
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Stabilizers are together and ready for my least favorite part sanding.





Old 01-29-2020, 08:38 AM
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I hope you don't mind but in the Warbird Quiz thread I used your airplane as a subject and I have mentioned you build to see if some of the guys would like to follow along.

Last edited by FlyerInOKC; 01-29-2020 at 08:42 AM.
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Old 01-29-2020, 09:52 AM
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That is fine the more the better. someone out there might have some good input.
Old 02-05-2020, 11:20 AM
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Trying to make sure I get the wing right. it says to put a center line on rib 2, 7, and 11. here Is how I have them marked so far. I just want to get it right. any help will be appreciated. Not much in the instruction or the plans.



Old 02-05-2020, 11:45 PM
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Thatís how I would interpret it but from the photo it seems your line on W11 is slightly off center at the TE.
Iíd suggest you carefully sand the aft ends of the ribs to a fine point (they have a slight square edge currently due to the cutting process probably) and then ensure the line is very accurate. Itís all in order to avoid building in a twist in the wing.
Old 02-06-2020, 07:55 AM
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Here is my problem are the trailing edge all suppose to line up? if I put a leading edge under them to keep the line level then all ribs will be a different distance from the building surface. If that is right then I should be good. If I put the leading edge under the trailing edge then they are all at the same height but they are not level. I don't want to glue this until I have it right. The kit has a 68" wing span for those who have asked. I have the plans in PDF. if any one wants a copy.




Attached Files
File Type: pdf
Royal Ki-61.pdf (1.09 MB, 7 views)

Last edited by Mtthwacrss; 02-06-2020 at 07:57 AM.
Old 02-06-2020, 08:12 AM
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You must think in three dimensions both the cord and the wing thickness is tapered. Your support should be following the angle of the wing taper (parallel with the training edge line) and NOT parallel with the main wing spar. If the support is in the correct spot the center line of each rib will line up in one straight parallel line. Each rib is a difference thickness and therefore for the centerline to be at the same height from the building surface the support must be angled to hit the correct point.
Old 02-06-2020, 08:22 AM
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For a wing that tapers in thickness and in planform, yet uses a constant thickness jig spar, youíll usually find it is not parallel to the main spar nor to the TE.

What Iíd suggest is that you determine the position that gives a level root rib, then determine the position that gives a level tip rib, and fix the jig spar to the building board so that it goes through these two points.

All ribs in between root and tip will now be correctly aligned.
Just make sure you have the exact mirror setup for the other wing panel.
Old 02-06-2020, 08:29 AM
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So I should be right then as long as the lines are right on the ribs and they are level. I will be following EF's advice on the trailing edge of the ribs and sending them to follow the rib shape to a point. If anyone has something else let me know. Thanks for all the help. hard to believe I have been building as long as I have. this is just a very old kit with very little in the way of direction, and I don't want to ruin it as it is one of my favorite planes. My uncle build this kit back in the 70's but I didn't get to watch that build much and have forgotten to much.
Old 02-06-2020, 08:37 AM
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Just sand lightly, only to get a nice continuity, not alter the shape of the ribs.

Last edited by EF; 02-06-2020 at 08:39 AM.
Old 02-06-2020, 09:00 AM
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Originally Posted by Mtthwacrss View Post
So I should be right then as long as the lines are right on the ribs and they are level. I will be following EF's advice on the trailing edge of the ribs and sending them to follow the rib shape to a point. If anyone has something else let me know. Thanks for all the help. hard to believe I have been building as long as I have. this is just a very old kit with very little in the way of direction, and I don't want to ruin it as it is one of my favorite planes. My uncle build this kit back in the 70's but I didn't get to watch that build much and have forgotten to much.
What you are seeing was the norm for the 70s most kits were documented in this way. I have seen a bunch with just one or two type written instruction sheets.The assumed you were already capable at building a certain level with specific skills and then they filled in a few blanks specific to the model. It was like that with the single page plans in magazines with a short companion build article. You are expected to be able to figure it out on your own. We are spoiled now with the way Top Flite, SIG, Great Planes, and others started documenting with lots of photos and step by step instructions. I got back into RC back in 2004 with a SIG Kadet kit and the detail level on the instructions totally blew my mind away.
Old 02-07-2020, 01:05 PM
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I know how they looked in the 70's as I helped my uncle back then. just have some trouble making sure I am understanding the instructions that were translated from Japanese to German then to English. I will say most of my recent builds have been 80's or 90's kits and I am a little rusty. I started out building in the late 60's with my Dad and uncle.
Old 02-07-2020, 04:47 PM
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Same here but on my own. I was the only modeler in the family.
Old 02-10-2020, 12:19 PM
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Default Ribs are in.

Got my ribs laid down and leveled. Bottom and top spar are glued in. Will start the trailing edge sheeting tonight. Thanks for all the help and suggestions, sometimes you just have to hear things in different word to make them make sense. I just couldnít make myself see it in 3D. When I read the instructions I kept thinking they wanted the leading edge laid down at the end of the ribs which didnít sound right of course it wasnít, had to have it at an angle to keep them all level.

Old 02-10-2020, 12:58 PM
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The important thing is you figured it out. I have a habit of collecting kit manuals in electronic form I find when I get stuck I will start by reading a couple of them and review a built or two online. The different points of view give you a better understanding even when its not the same airplane.
Old 02-11-2020, 09:05 AM
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Default slow progress

OKC I do that to but didnít think of that this time.

Got the trailing edge glued in last night so making progress, but very slow. Hope to get the other trailing edge on tonight.



Old 02-11-2020, 09:17 AM
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Hey Matt that is starting to look like a wing!
Old 02-11-2020, 09:25 AM
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I like the Ki-61 it reminds a bit of the M6A1-K Nanzan (Land based trainer version of the M6A1 Seiran). One of these days I am going to pull the Mike Hawkins' plans and maybe enlarge them a bit and build the Nanzan. Mike designed it to take .19 but it couldn't overcome the drag and take off with floats.
Old 02-11-2020, 09:34 AM
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Good advice from FlyerInOKC. Matt, you probably don't need to hear it, but in the spirit of other people following build threads, I feel lit it should be said. When one starts of the second half of the wing, especially where the builder is defining the center line of the rib, it is super important to keep things symmetrical. Looking down onto the plans most people will catch the obvious symmetry of left to right and front to back but not necessarily that of the depth of the wing. I've been bitten by that one. It's not hard for a little wash in or wash out to creep into the second wing half.
Old 02-11-2020, 09:45 AM
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I remember building an old SIG Rascal C kit. It had very clear specific instructions on how to build in the washout. Matt is right it is very easy to end up with a little wash in or out when building a wing. The easiest way to fix it is to take all necessary precautions not to build it that way in the first place. I can say from personal experience that is a lot harder to do then to say!

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