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nnChipmunk - 800mm

nerdnic

nerdnic.com
Mentor
#1
DETAILS
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Hi Friends.

Even before releasing my own designs I focused on 800mm size planes. The FT Spitfire, and especially my 800mm version were my all time favorite planes to fly. That is until I created the nnChipmunk.

For those who have followed my previous builds it will come to no surprise that the nnChipmunk became my new love after just the first flight. It's stable, quick, forgiving, responsive, and a joy to fly. It only makes sense that it would be my first 800mm conversion. I have been planning this one for a while now and I'm very excited to finally have the plans ready to share.

Outside of the normal changes needed to reduce down the plans I also made the following changes:

Increased side of wingtip area near the ailerons
-On my full size these thin 'tabs' were some of the first areas to show wear. They are just a tad thin and on a reduced size plane it would be even more fragile.

Increased side tabs of h-stab
-Same issue as with the wing. These tabs were just too thin for DTFB.

Firewall top plate moved back .5 inch
-As you scale the plans down some parts don't work right. The size of your motor only changes a little, if at all on a 800 size bird, so this helps prevent the entire can from sticking out.

I will be going through my build and review over the next week or so. What do you guys think? Will the 800mm nnChipmunk fly as good as its full size brother?

If you like this design then perhaps you’ll like some of my others as well.




SPECS
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WINGSPAN

33.5

FUSE

24.2

CHANNELS

3

WEIGHT

700g

ELECTRONICS

BEEF Equivalent
MOTOR - Turnigy D3530/14 1100kv 73g 315w 22a
PROP - 9x6 APC
ESC - HobbyKing Blue 30a
BATTERY - 1000mah 3S to 2200mah 3S
SERVOS - 3x 9g

PROJECT Speed
MOTOR - NTM 35-36 1800kv
PROP - 7x7 APC
ESC - 80a Dynam
BATTERY - 2200mah 40c 4S
SERVOS - 3x 12g Emax ES08MA II metal gear

BUILD DIFFICULTY

Beginner – You’ve never flown a plane before, let alone done a scratch build
Novice – You’ve flown a plane but have no experience with scratch building
Intermediate – You’ve flown and built a few FT style planes before
Advanced – You’ve mastered the standard FT build style and are looking for a new challenge
Expert – You’ve mastered all build techniques and aren’t afraid to improvise or tackle tedious builds

MATERIALS

2 sheets DTFB
4 BBQ skewer
1 sheet poster board
1 landscape flag
1 2 liter bottle
1 flat aluminum 1/16" x 1/2" x 3'




PLANS
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nnChipmunk - 800mm

Version 1.2
January 19th 2015

Change log
--Added 800mm pod
--Added pod holes to fuse
--Added cooling notch to fuse top plate
--Added exhaust vent on belly plate

Version 1.1
January 13th 2015

Change log
--Added Super Chipmunk options

Version 1
November 22nd 2014
Plans no longer available

Change log
NA




FAQ
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Will this plane work with the standard FT powerpod and electronics?
No. While the Beef package/park 425 or greater will work just fine, the standard FT powerpod is too large to fit in the nnChipmunk 800mm. You can use the same electronics but you'll need to build a new powerpod for my 800 size planes. A Blue Wonder type motor would also work just fine.

So if I want to build an 800mm nnChipmunk I don't have to fly it really fast, right?
That's correct. You can even use the same power setup from the smaller swappables like the FT Flyer and it will still fly great.

How did you color your plane, it's amazing!
I used carton sealing tape from TapeBrothers.com It is very easy to work with and the results are very impressive.

You list flat aluminum as a needed material for this build, what's that for?
If you're planning to build a fast 800 nnChip then you need a wing spar. Please see this FT Forum post for more info on how to make an aluminum spar.


PICS
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VIDEO
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Speed run with radar


REVIEW
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The review is broken down into major characteristic groups that capture what most pilots will look to learn when researching a plane. I have also included details about how the slower BEEF Equivalent (BE) and faster PROJET Speed (PS) stacks up.

STALLS
BE: No tip stalls even at slow speeds. The wing tip under camber really helps here.
PS: Will tip stall if you’re not careful. She’s much heavier in this set up and you’ll want to keep your speed.

WIND
BE: Wind performance is great. Side winds are no problem and in a light breeze the 800mm nnChipmunk will hover in place.
PS: Handles wind with no issues but you won’t get a solid hover out of this set up.

LAUNCHING/LANDING
You’ll need to give her a good toss on launch and come in a tad hot.

ACROBATICS
Rolls, loops, and inverted are solid. You’ll need a decent amount of up elevator when inverted but the 800mm nnChipmunk is very stable upside down.

GLIDE SLOPE
BE: Does very well.
PS: Wants to drop pretty quickly.

LOOK AND FEEL
The Chipmunk is a unique looking plane with its tail ridge and cockpit. The final product really captures the look of the Chipmunk.

As far as feel goes, like the full size nnChipmunk the 800mm version is a real treat to fly. Finding a truly fun plane to fly can be tricky but the 800mm nnChipmunk is a solid bet. It has a huge speed envelope and appeals to a wide range of skill levels.


FINAL COMMENTS
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If you’re looking to try a 800mm size plane then do yourself a favor and start with the nnChipmunk. I know you won’t regret it! Also, please share any photos, stories, or questions you might have. I love hearing from everyone and I hope you enjoy my planes.

Thank you for checking out the 800mm nnChipmunk! If you built a 800mm nnChipmunk and enjoyed it please consider donating a few bucks so I can buy more supplies to make more great planes.

 
Last edited:

jayz 84

Posted a thousand or more times
#2
Ah ok nic how about a build race. You got me build testing the mig3 and you got the chipmunk. Just kidding but i cant wait to get these little monsters going. Nothing but love for the 800mm,s
 

jayz 84

Posted a thousand or more times
#4
Heh I think you'll win. You're a build machine lately.
Heh ya when i have time. I was mostly focused on the mxs-r build. But now it and the clip spit are 95% done. I just got the plans traced out on the board for the 800mm mig3
 

jayz 84

Posted a thousand or more times
#10
Yeah, I think a few changes but no problems :)
Ok thats good. As for the 800mm mig3 i have no problems so far i have the fuse, belly intake, tail stabs, all built just waiting to be glued in there places, and i have the wings all beveled a creased, servo slots cut out and skewers in place. So far everythings great
 

nerdnic

nerdnic.com
Mentor
#12
Ok thats good. As for the 800mm mig3 i have no problems so far i have the fuse, belly intake, tail stabs, all built just waiting to be glued in there places, and i have the wings all beveled a creased, servo slots cut out and skewers in place. So far everythings great
Awesome! Are you gonna use your ef1 motor?
 

jayz 84

Posted a thousand or more times
#13
Awesome! Are you gonna use your ef1 motor?
No i have the ef1 setup for the bigger planes. Cause if i remember right the bell of that motor is to tight of a fit for the nose on a 800mm. So the 35-36-1800 will be the one until i can free up some funds to get the big foot ten motor
 

nerdnic

nerdnic.com
Mentor
#15
Thanks. I took my time with the tape, it's super clean.

Yeah I gotta build both for my review. The undercamber version won't be as fast but it should be a really fun bird still. I plan on keeping this one around for a bit.
 

jayz 84

Posted a thousand or more times
#16
Thanks. I took my time with the tape, it's super clean.

Yeah I gotta build both for my review. The undercamber version won't be as fast but it should be a really fun bird still. I plan on keeping this one around for a bit.
I figured that was what you were doing. And im sure itll still be fast, but not sure how much faster with the race wing, guess ill be finding out soon. And im going to try to keep my birds around as long as i can to, by not being so daring with my flights, just enjoy it, And ha bad news i ran outta foam lastnight. I used my last two on the mig. Have to wait on box to show up some time
 
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nerdnic

nerdnic.com
Mentor
#18
I figured that was what you were doing. And im sure itll still be fast, but not sure how much faster with the race wing, guess ill be finding out soon. And im going to try to keep my birds around as long as i can to, by not being so daring with my flights, just enjoy it, And ha bad news i ran outta foam lastnight. I used my last two on the mig. Have to wait on box to show up some time
Yeah same here. Usually my planes deteriorate slowly after an initial bad unexpected landing because Im too daring haha.
 

jayz 84

Posted a thousand or more times
#20
Thanks man! That was all done after building too. Next time I'll do it when the board is still flat.

What color do you think I should make the bottom of the fuse?
I would go half and half on the fuse with the same colors. Do some design going down the center on the side and use the yellow like a pin strip to separate the two colors