2,3m / 88" Extra 300 Depron/fiberglas composit Scratchbuild - Extreme Light - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Jun 01, 2012, 03:45 AM
Registered User
Build Log

2,3m / 88" Extra 300 Depron/fiberglas composit Scratchbuild - Extreme Light

Hey folks

After building lots of depron planes, including a 1/4 Cub, I have now started this new project:
A 2,3m Extra 300, builded in 3mm Depron, and full covered with 49g fiberglass. I beliewe in a takeoff weight about 4-5kg.

My Cub - takeoff weight 2,2kg
Name: kfk1.jpg
Views: 591
Size: 125.5 KB

First step on the Extra
Name: ribber.jpg
Views: 583
Size: 94.5 KB
Last edited by polledk; Jun 03, 2012 at 07:07 PM.
Sign up now
to remove ads between posts
Jun 01, 2012, 02:27 PM
Zen in the art of foam
djacob7's Avatar
Wow! 2.3 meters is HUGE! Good luck on the maiden!
What glue do you use between wood and foam?
Jun 01, 2012, 05:33 PM
Registered User
Originally Posted by djacob7
Wow! 2.3 meters is HUGE! Good luck on the maiden!
What glue do you use between wood and foam?
Between wood and depron i use UHU Por or polyurethane glue - depense on where.
Jun 02, 2012, 06:27 PM
Registered User
Latest pic┤s from the workshop
Name: 02062012103.jpg
Views: 550
Size: 56.9 KB

Name: 02062012104.jpg
Views: 606
Size: 94.3 KB

Name: 02062012105.jpg
Views: 513
Size: 65.5 KB

Name: 02062012106.jpg
Views: 785
Size: 105.3 KB
Jun 03, 2012, 10:57 AM
Registered User
More pic┤s of the wing construction

Name: bjŠlke1.jpg
Views: 537
Size: 110.8 KB
Description: assembly of the box in the wing

Name: bjŠlke2.jpg
Views: 405
Size: 90.7 KB

Name: bjŠlke3.jpg
Views: 402
Size: 106.5 KB

Name: bjŠlke4.jpg
Views: 404
Size: 80.4 KB
Description: the box┤s for the wing

Name: bjŠlke5.jpg
Views: 431
Size: 148.0 KB
Description: complete main bar, 250g
Jun 03, 2012, 07:09 PM
Registered User
First wingsection almost done.
Weight this far is 146g/5oz

Name: 04062012113.jpg
Views: 496
Size: 69.4 KB

Name: 04062012114.jpg
Views: 527
Size: 70.4 KB
Jun 03, 2012, 07:55 PM
Registered User
Thats huge! Great work so far.
Jun 04, 2012, 04:51 AM
Warbirds Lover
Dreamcatcher's Avatar
Hi !

Very interesting project...

Subscrived !
Jun 07, 2012, 12:18 PM
rebell's Avatar
How is the progress?
Jun 07, 2012, 05:54 PM
Registered User
Got a few more pic┤s from the work so far.
The wingpanels this far are showing 207g / 7,3OZ each.

Name: 06062012116.jpg
Views: 424
Size: 65.0 KB

Name: 06062012117.jpg
Views: 459
Size: 68.1 KB

Name: 06062012118.jpg
Views: 579
Size: 56.0 KB

Name: 07062012119.jpg
Views: 523
Size: 30.4 KB

Name: 07062012121.jpg
Views: 493
Size: 42.2 KB

Motor is ordered: Hacker A60-6XS

Name: A60-6XS-V2-28-Pole-15727609_b_0.jpg
Views: 336
Size: 43.4 KB
Jun 09, 2012, 09:58 AM
Registered User
The maingears on the market, that will fit this size, are too stiff and heavy, so i┤ll try make one myself.
Laminated in plywood.
First I have wet the 4 layers of 1mm ply, and will let them dry in the form. Them I┤ll glue them with polyurethane, again in the form.

Name: 09062012122.jpg
Views: 413
Size: 97.7 KB

Name: 09062012123.jpg
Views: 379
Size: 79.6 KB

Name: 2.jpg
Views: 377
Size: 70.1 KB

Name: toe.jpg
Views: 395
Size: 122.4 KB
Description: "Toe-in" is builded in the form
Jun 10, 2012, 05:31 PM
Registered User
Maingear is out of the form. It was still feeling wet, so into the owen for 6 hours. Now it feels dry, and strenght is feeling like it will work. weight is 106g
Name: 10062012126.jpg
Views: 398
Size: 118.0 KB

First wing panel is ready to be sanded, and then fiberglass. Weight incl. aileron is 216g
Name: 10062012127.jpg
Views: 426
Size: 61.9 KB
Jun 12, 2012, 03:44 PM
Registered User
Both wingpanels are now ready to be sanded before fiberglas, so its time for the fuselage.
I┤ll use same construction pricip as the Extreme Flight I┤m copying, with an inner section, wich will be the connection between motor, accu, wing and maingear.

Name: 12062012129.jpg
Views: 466
Size: 102.8 KB

weight for inner section incl. maingear is 310g
Name: 12062012130.jpg
Views: 437
Size: 87.0 KB

Name: 12062012131.jpg
Views: 401
Size: 82.6 KB

Name: 12062012132.jpg
Views: 356
Size: 80.7 KB
Jun 15, 2012, 05:54 AM
Registered User
Status this far

Name: 1.jpg
Views: 391
Size: 84.5 KB

Name: 2.jpg
Views: 401
Size: 107.2 KB

Name: 3.jpg
Views: 359
Size: 44.1 KB
Jun 15, 2012, 06:40 PM
Registered User
And - some more pic┤s

Name: 15062012143.jpg
Views: 365
Size: 59.6 KB

Name: 15062012144.jpg
Views: 362
Size: 59.4 KB

Name: 15062012142.jpg
Views: 333
Size: 53.6 KB

Dowels in 2mm carbon
Name: 15062012141.jpg
Views: 352
Size: 131.3 KB

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale Extreme Flight 58" Extra 300 LPU Hobby Garage Aircraft - Electric - Airplanes (FS/W) 6 Mar 28, 2012 01:20 PM
For Sale Extreme Flight Extra 300 LPU Southeast MO ml0126 Aircraft - Electric - Airplanes (FS/W) 0 Mar 06, 2012 08:13 PM
Sold Extreme Flight 58" Extra 300 EDFPILOT Aircraft - Electric - Airplanes (FS/W) 11 Feb 24, 2012 08:20 PM
Wanted Mirage 2000 fiberglas/composite 90mm sdougm Aircraft - Electric - Jets (FS/W) 8 Jan 12, 2012 08:08 AM
Yippee! please can you help me find a 20"-30" extra 300 depron plan? vanepico 3D Flying 9 Nov 10, 2005 02:20 PM