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Jan 27, 2010, 01:53 PM
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Build Log

Mig-7 ( CNC foam cutt )

Hello to all.

I wanted to present my favorite Mig-7 model witch i take every time to the field because it flights very well. it's easy to flight, stable and it could fly very slow witch is amazing effect. . This plane was cut on my CNC foam cutter.

Wingspan: 110 cm
Length: 76 cm
Weight ready to fly: ~ 240 - 280 grams (depending on li-pol used)
Drive: Engine Tower PRo 2406
Propeller: 9 * 6, 9 * 4.7
Battery : 7.4 V 1200mAh 20c, 11 V 1100 12 C, 11 V 1000 mah 10 C

Plane is cut from Austrotherm similar to BASF (styrodur) and wing is form regular polystyrene.

Wings was covered with thin white paper glue that was used is simple VICOL glue mixed with water in about 1:1 proportion but it can have more water so plane will be much more light. Paper gives very strong surface and it's easy to paint.
Last edited by kilop; Jan 27, 2010 at 03:27 PM.
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Jan 27, 2010, 01:55 PM
Build it again, Sam!
Harpye's Avatar
HI Kilop!

really nice result ... but lots of cutaways.... ( you also could do this by depron bending... without programming in half the time... but it is very nice!!!
Jan 27, 2010, 02:49 PM
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no lots of cut ways it has only 3 sectors of fuselage so easy to cut only nose cut long , if it is cut from Austrotherm it is much more stronger than 3mm depron bended.
Jan 27, 2010, 05:35 PM
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Nice work kilop, this model is very nice! I would not have guessed that the magnets could hold the wings on in flight. The paint and finish work is nicely done as well. Do you intend to release plans?
Jan 27, 2010, 05:57 PM
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neodymium magnets are strong enough i got older prototype made without CNC and i used the same magnets ( 7mm x 3 mm x 10 mm ) , you must make some similar connection and try to open it you will see that 4 magnets have good and strong connection . If some one prefer regular screw can use regular screw .

Last plane i used in 2,5 season and I never had any problem with this neodymium magnets connection i prefer this than regular screw.

Plane is made for GMFC software and for now it isn't free-ware
Last edited by kilop; Jan 27, 2010 at 06:29 PM.
Jan 28, 2010, 04:35 PM
My plans are in my blog
Rusty-Gunn's Avatar
Kilpo... this is a nice build. I like the camo, too. you do nice work.
Do you have pics of the CNC machine cutting your foam? What sort of cost does one like yours go for? Thanks.
Jan 29, 2010, 03:23 AM
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I will make some pictures of my machine later. Now SE5a is on table and I must finish painting it .

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