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-   -   Cargo plane - Twin engine project (https://www.wattflyer.com/forums/showthread.php?t=79866)

solentlife 02-27-2019 10:07 AM

Cargo plane - Twin engine project
 
This winter is creating a build frenzy ....

I've built the Mosquito ... then the Vulcan ...and now I want a cargo twin to do candy / poppy drops. A C130 / A400 style would be fine - but they are 4 engine jobs ... I have a couple of small 930kv motors that I reckon a 1m span Hercules style could do.

Sketch out plans :

http://i6.photobucket.com/albums/y24...psxrtbnghh.jpg

http://i6.photobucket.com/albums/y24...ps8jmssaf1.jpg

Cut the parts

http://i6.photobucket.com/albums/y24...psnpshhroq.jpg

Lite Ply source for strengthening formers

http://i6.photobucket.com/albums/y24...psxfc4rsfm.jpg

Sides and formers ready

http://i6.photobucket.com/albums/y24...psimzt0l1g.jpg

Gluing up

http://i6.photobucket.com/albums/y24...pstziogmc3.jpg

http://i6.photobucket.com/albums/y24...psmzsdqrdg.jpg

3D print some motor cowls

http://i6.photobucket.com/albums/y24...psxyogf5ae.jpg

fuselage continues

http://i6.photobucket.com/albums/y24...ps7q2zco6n.jpg

Basic wing cut and checked ... will be flat bottom wing with curved top sheet added

http://i6.photobucket.com/albums/y24...psaz2g0mtd.jpg

Testng ideas for wing spars ..

http://i6.photobucket.com/albums/y24...psvtfrohgz.jpg

She will have servo operated cargo door at rear .... flaps ... and the usual 4 other ch's ...and I will add a Stabiliser Gyro to give me slow capability for the 'show drops' its intended for.
U/C will be like the C130 ... twin outer wheels on fuselage and a front steerable. All fixed ...

Initially it was just an idea ... but once I started - the bug has bit deep !

solentlife 03-11-2019 12:58 PM

Been interesting road .... but now she is ready for cosmetics ...

http://i6.photobucket.com/albums/y24...ps9seugwen.jpg

7x 3.5 3 bladers on 3S gives 8A at WOT ..... now to test 8x4.5 3 bladers.

solentlife 03-11-2019 03:43 PM

http://i6.photobucket.com/albums/y24...psl4hvebzh.jpg

2s 3000 AUW to fly : 980gr

3S 1800 AUW to fly :960gr

I targeted 1000gr ..... so very happy.

http://i6.photobucket.com/albums/y24...psmzcd7jqp.jpg

http://i6.photobucket.com/albums/y24...psuozcp6so.jpg

Don Sims 03-12-2019 12:35 AM

Looking forward to seeing this one fly Nigel.

solentlife 03-12-2019 01:21 PM

Just sorting out how to mount SS3 tag for video recording.And wait weather of course.

The 8x4.5 props ..... 3S 1800 = 18.5A ...... WOW !! Pulls vertical ... on 2S 3000 = 11A and decent pull and of course nice long flight time.

solentlife 03-17-2019 05:59 PM

Braved cold blustery wet wind ...............



The 2S on the 8x4.5x3 proved only just able to fly with this wind ......so I have now swapped back to the 9x4.5x3 props as I want that weight of the large 2S pack in there.

solentlife 04-08-2019 01:51 PM



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