nnKi-61

[nerdnic]

Very cool! I'm glad you are enjoying this build so much If you haven't already, check out my other designs that feature speedwings also.

I have updated the first post with photos, specs, plans, faq etc. Enjoy!

 

[Blackline]

Hello nerdnic,

Great planes you make
Do you still support this channel? I have a question about the elevator, those two are separated from each other


Did you make a Y link to 1 servo ?

 

[BridgeInspector]

Two push rods connected to the same servo with one rod to each elevator half.
Few Options:
Use adjacent holes on servo arm and put one rod for each elevator
or enlarge one hole to fit both rods
or use one rod bent in middle through servo arm and ends go to elevators

 

[Blackline]

Thanks for the reply,

I still do not understand what you mean, sorry. i need to see it, do you have a photo or something.
2 elevator rods to 1 servo arm

 

[jpot1]

Checkout nerdnic’s chipmunk video as he shows the setup in the video. Here’s a quick picture to illustrate.

 

[Blackline]

a picture are a thousand words, thanks man. Did not know that was possible.

 

[Headbang]

Files ready for the CNC. 750W Turnigy motor, 80Amp HK ESC, Savox 14g MG servos, 2 4S 55C 2200mAh batteries, and 6ft of aluminium in hand. Will start cutting over the next day or 2. This is my Christmas build!

 

[nerdnic]

Can’t wait to see it!

 

[JakeTheSloth]

Here's my mini version of hien. Downsized plans to 65% and used stuff laying around my room. 2x3,7g servos for ailerons and 9g servo for elevator, 12A ESC, 2204 motor, 6x4,5 prop and 900mAh 3s lipo. I modified wing to "ft style" and it came out better than I expected. I used some new techniques with this build, eg. double bevel for fuse instead of b folds and molding wings. I put two thin CF spars in wings, but they are not attached to each other and I'm concerned about it, we'll see how will it fly (if it will)

 

[JakeTheSloth]

Oh boy it flies. It's super fast, it's one of fastest models I made so far, but well, I made few mistakes. First launch didn't go well because I used too much power and torque turned it to side and I flew in tall grass, second launch was succesful and smooth. But... I expected some problems with wings, and I wasn't wrong. When I made immelman turns or just went out of a dive, wings tried to hug each other hahah, but the cause of crash wasn't it. I crashed because wing tip broke and I couldn't keep plane airborne.
Here are my solutions - single aluminium or basswood spar in correct shape and shortening wing underchamber or at least reinforcing it from underneath ( I doubt that it will be necessary for DTFB, I'm using quite different material that is very fragile if not covered with packing tape, and I was too lazy to cover tips)
P.S. I'm gonna make mighty mini nn spitfire next )) I love how scale those models are, simply a work of art

 

[Mile Hy warbirdz]

Nice work Jake! I built a 70% Ki-61with my son but I still used the speed wing template and did a few spar mods and crease line mods they fly great just like their big brothers. I love Nic's plans due to their simplicity. I use popsicle sticks for strength in near the servo and wing tips. Also adding a little right thrust when you build your powerpod helps with the torque roll.

 

[JakeTheSloth]

I rebuilt my hien already and opened wings to put a spar in it. I'm searching around my room and workshop, hopefully I find somethting. I'm going to add short CF sticks to strenghten wing tips

 

[JakeTheSloth]

Okay I'd want to comment mini hien. This plane is sooo smooth. It flies flawlessy. I wanted to crash it to have parts for mini spitfire, but this plane just flies too good. It has great handling both when you fly fast and slow. Very little torque problems, even besides I made no right thrust, inverted requires almost none elevator correction. Conversion of wing to FT style went really easy and better than I expected (remember that I'm using 6mm XPS), but still I didn't put spar inside because I don't know how to resize it. I simply glued wing empty inside, molded it to required shape and then put alu spar inside. Dihedral is completely random. Few aspects still need correction, split elevator isn't working too good, it tends to roll plane when you punch it. It'd be a good idea to add markings on turtldeck formers for easy montage, and well, that's it. Really good plane overall, in my feeling better than SS P-39 and MM P-51.

 

[Robyle3]

I know this is a year out, but can anyone tell me how the split flaps work? When imagining gluing everything together, I just can't see how the inner part of the wings is flush with the flap that I'm not supposed to glue.

 

[nerdnic]

I know this is a year out, but can anyone tell me how the split flaps work? When imagining gluing everything together, I just can't see how the inner part of the wings is flush with the flap that I'm not supposed to glue.

Here is a photo to help. You don't glue on the trailing edge. Glue goes at the contact point just after the flap hinge.

 

[Robyle3]

So, when I'm folding everything over, should I tape the flap open?

 

[nerdnic]

Yes. Also, add your glue to the bottom wing that way you can control where it goes.

 

[Robyle3]

Thank you for the help, now can you tell me where my glue gun went XD?
I have searched high and low, but I think I'm going to have to get a new one. It was old and getting unsafe to hold anyway, oh well.