nnMIG 3 Swappable - design, build, and review log

[Jaxx]

Looks so good! I see you're building from the old plans, though. Make sure to double check your CG as I moved it forward in the latest plans.

I'll be building from the V1 plans. Had them printed when you first released them. Any major issues I need to look out for?

Posted this question in the nnA-10 thread a few days ago:

"Nic,

Any plans for a V2 of the nnA-10, with a hatch, build video and kits?"

 

[nerdnic]

I updated the wing so it builds different (easier) and moved CG. I'd say it's probably worth it to re print the wing plans at this point.

Are you asking about a v2 MiG or A-10?

 

[planebreaker2000]

I checked the plans again and I think I used 1.4 version. I added the former to hold up the turtledeck.

 

[nerdnic]

Ah okay. Yeah I dropped that former in the latest version so that was what caught my eye.

 

[Jaxx]

I updated the wing so it builds different (easier) and moved CG. I'd say it's probably worth it to re print the wing plans at this point.

Are you asking about a v2 MiG or A-10?

Okay, I will send the latest version of the Mig 3 plans to the print shop before I start the build. I was asking if there were plans for a V2 A-10 with a hatch, kits and build video.

 

[nerdnic]

There sure is!

 

[Hell2Go]

My son is once again resurrecting my nnMig3... this time he's putting my turnigy 4240-1300kv on it! prop test data says 2100gr of thrust with a 10x5 and a 4 cell... he wants to run a 8x8 with a 6 cell on it! that calculates to 218mph pitch speed! or 145mph on a 4s... has anyone tried this motor with a 6s?

 

[Hell2Go]

I think we need a real 6s, we series 2 3cell 1300s to make a 6cell and tested wit an 8x6 prop... wasn't any faster... I don't know, maybe we are just hitting the terminal velocity of the airframe, and just can't get it faster?

 

[nerdnic]

You flew it with a 8x6 on 1300kv and a 6s battery? It should definitely have been faster. What batteries did you use? Just to check the obvious, they were series and not parallel??

 

[jpot1]

Thinking of building this with the basic wing. I see the two tapered spars but how do these work when the dihedral is added? Is there a measurement for the height of the wingtips when the center section is flat on the table?

 

[jpot1]

Didn't find any reference for the standard wing build so I thought I'd share my build process.

1. Cut out both wings, making sure to flip the plans. Although the plans do not show it, you will need to remove the paper and melt some foam on the top of the wing so the wing will meet the tapered spars.



2. Join the bottom of the wings as per FT norms - tape on one side, bead of glue, wipe off excess. I then installed the spars and servos. I was concerned about the center where the spars meet so I added some popsicle stick reinforcement. Was undecided about landing gear so I went ahead and added pieces of paint stick. In retrospect probably should have continued it between the spars as well.



3. Fold over and glue like a normal FT wing - LE, spars, servo top, etc...



4. Made my own dihedral gauge with a 5 cm height.



5. Finished product!

 

[jpot1]

I got the nnMig 3 done at 115%.

View attachment 71469 View attachment 71470

It comes in at 31 oz with a 3300Mah 3s and a power 15 swinging a 11x8.

Haven't maidened yet. Too much wind, but taxi tests and hop ups look good.

I got my Nerdnic speed build kit ordered and I am anxiously awaiting its arrival.

Planebreaker, can you show how you mounted the landing gear?

 

[nerdnic]

Didn't find any reference for the standard wing build so I thought I'd share my build process.

1. Cut out both wings, making sure to flip the plans. Although the plans do not show it, you will need to remove the paper and melt some foam on the top of the wing so the wing will meet the tapered spars.

View attachment 76367

2. Join the bottom of the wings as per FT norms - tape on one side, bead of glue, wipe off excess. I then installed the spars and servos. I was concerned about the center where the spars meet so I added some popsicle stick reinforcement. Was undecided about landing gear so I went ahead and added pieces of paint stick. In retrospect probably should have continued it between the spars as well.

View attachment 76368

3. Fold over and glue like a normal FT wing - LE, spars, servo top, etc...

View attachment 76369

4. Made my own dihedral gauge with a 5 cm height.

View attachment 76370

5. Finished product!

View attachment 76371

Great job on the walk through! Have you finished your build yet?

 

[jpot1]

Almost done. Hope to maiden this weekend and if all goes well add the rest of the decals. I realized too late that the 1.4 versions don't include the extra wing cut out. This causes the scoop to not sit flush as the trailing edge of the wing gets in the way. Will belly land for the maiden anyway so I have left it off for now.

Great design and build - thank you!

 

[nerdnic]

Looks very clean! Can you elaborate on what's missing in 1.4?

 

[jpot1]

Looks very clean! Can you elaborate on what's missing in 1.4?

Turns out had more time than anticipated this afternoon, so this happened.



Regarding the 1.4 version of the plans. When I mounted the wing the trailing edge was not flush with the fuse. It certainly could have been something wrong that I did but prior versions of the plans seemed to have green lines indicating additional areas to cut out for the basic wing. Depth in the picture is not great so I'm basically raised up by 5mm.



As a result the scoop doesn't sit flush. I will either cut triangular pieces to fill the gaps or re-cut the scoop.

 

[planebreaker2000]

Jpot

I didn't see your question. I mounted the landing gear like the FT mustang. A 1.5" x 2" piece of whatever you got paint stick, bass wood, lite ply, goes in the wing right next to the spar for strength. I usually remember to do this before closing up the wing, but if I don't a flap can be cut open afterward and the piece of wood can be glued in and the glue the flap shut. I sometimes put a little triangle of foam to help keep the gear from being too wobbly. This is a different plane, but same idea.

 

[nerdnic]

Turns out had more time than anticipated this afternoon, so this happened.

View attachment 76441

Regarding the 1.4 version of the plans. When I mounted the wing the trailing edge was not flush with the fuse. It certainly could have been something wrong that I did but prior versions of the plans seemed to have green lines indicating additional areas to cut out for the basic wing. Depth in the picture is not great so I'm basically raised up by 5mm.

View attachment 76442

As a result the scoop doesn't sit flush. I will either cut triangular pieces to fill the gaps or re-cut the scoop.

View attachment 76443

Ah okay I see. The plane was originally designed for the speed wing and then I added the basic wing later. The cutout is off a but it seems. I'm planning a v2 and I'll get it cleaned up then.

The way your wing sits right now you might need some elevator down trim as your aoa is slightly positive. Should still fly fine, but just be aware

 

[jpot1]

Got it, thank you. If you need someone to try out v2, just let me know.
Jason

 

[jpot1]

Wow, wow, wow. No video but was able to maiden this morning. I am still new to flying so this was by far the fastest FT style plane I have flown. Flew beautifully and just felt different in particular in the turns, smoother somehow. Time to add some landing gear. Thanks nerdnic!

My hatch did come off at launch. For those that did a hatch mod, what are you using to hold it in?