A new fuselage for my Depron Super Cub

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
21 Apr 2017 01:42 #1 by Quorneng
A new fuselage for my Depron Super Cub was created by Quorneng
After much flying and repairs the fuselage of the Deprob Super Cub finally "let go" after a particularly hard crash, The reasons for which are not clear but could have been CofG related after the last repair.
So a completely new fuselage and at the same time to take the opportunity to check and re install all the electrics.
Only the wings, tail remain and undercarriage.

The new fuselage under way.

A true monocoque construction so far all built from 2mm Depron, even the rather unusual 'tube' motor mount.

The Emax 2805 motor is screwed to a 'printed' bulkhead glued inside the tube.

The motor tube will be glued in between the first two fuselage bulkheads.
Attachments:
Thanks: Eric, THE BLACKBIRD, boz, Firewood

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
22 Apr 2017 11:36 - 22 Apr 2017 11:40 #2 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
This picture shows how the tube motor mount is built into the fuselage.

In effect the motor is suspended off the back of the thick (relatively!) Depron nose block, which is by far the strongest 'bulkhead' in the entire fuselage. The nose block thus transmits the thrust and torque of the motor into the fuselage skin. ;)
The motor tube also extends back to the first true bulkhead to give horizontal and vertical stiffness to the motor mount. In this way, apart from the 'printed disk' motor mount which itself is a hollow matrix structure and is only 2mm bigger in diameter than the motor bell, the entire fuselage is just Depron. ;)

In hindsight I could have printed the bulkhead to incorporate the 'drum' motor mount as well and saved a few more grams.

Perhaps next time!
Attachments:
Last edit: 22 Apr 2017 11:40 by Quorneng.
Thanks: THE BLACKBIRD, old fart, boz, Firewood

Please Log in or Create an account to join the conversation.

More
22 Apr 2017 14:40 - 22 Apr 2017 14:40 #3 by boz
Replied by boz on topic A new fuselage for my Depron Super Cub
Does the airframe get covered with anything or is the depron sanded to shape then painted? Novice question.
Last edit: 22 Apr 2017 14:40 by boz.

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
22 Apr 2017 19:35 #4 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Boz
As with virtually all my 'scale' Depron builds there is no covering just the Depron surface with a bit of sanding, lightweight filling and a thin coat or two of acrylic paint.
Apart from following a true scale shape how it flies is more important to me than how it looks. I don't do glossy finishes! ;)
Thanks: boz

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
23 Apr 2017 00:00 #5 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
The fuselage now sits on its 'salvaged' wheels.

But only just as the fuselage only just counters the weight of the 26g motor!
Next job is to make up some bigger (2.5") 'Alaska' wheels for it.
Attachments:
Thanks: Eric, blue123, boz, Firewood

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
23 Apr 2017 22:55 #6 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Not much to show today - in fact nothing as picture downloads are blocked ;) - but the tail plane has been reinstalled.
Originally it had the elevator servo right in the tail and its rudder linked directly to the ailerons with pull/pull cables.
It all worked well enough however for the rebuild I will use a pull/pull cables for both the elevator and rudder with individual servos mounted much further forward. This should result in the battery also ending up on or very close to the CofG so any size/weight could be used, 800mAh for indoors, 3000mAh for endurance! ;)
Thanks: boz, Firewood

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
24 Apr 2017 20:37 - 24 Apr 2017 20:39 #7 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Hopefully a picture. ;) Now with its big "Alaska" wheels and the elevator servo installed.

Despite their chunky size each complete wheel weighs only 2.5g. ;)

Rudder servo next.

Edit - pictures still not loading!
Last edit: 24 Apr 2017 20:39 by Quorneng.
Thanks: boz, Firewood

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
26 Apr 2017 19:03 - 26 Apr 2017 19:04 #8 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Just because I will try another picture of it sitting on its big Alaska wheels.

edit:
Still no pictures.
Last edit: 26 Apr 2017 19:04 by Quorneng.
Thanks: boz

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
27 Apr 2017 16:39 #9 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Things moving on apace, just the windscreen to make (it will be removable and acts as the battery hatch) then just a paint job.
I have pictures of each stage of the build but........ ;)
Thanks: Firewood

Please Log in or Create an account to join the conversation.

  • one tenor
  • one tenor's Avatar
  • Offline
  • Forum Veteran
  • Forum Veteran
  • johnpcalex@gmail.com
More
27 Apr 2017 16:54 #10 by one tenor
Replied by one tenor on topic A new fuselage for my Depron Super Cub
Is that 2 mm plus on the radius or the diameter>

Anything will fly given enough power

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
27 Apr 2017 21:11 - 27 Apr 2017 21:12 #11 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
OT
Its a 30mm ID diameter Depron tube over a 28mm diam outrunner bell. ;)

Still no pictures
Last edit: 27 Apr 2017 21:12 by Quorneng.

Please Log in or Create an account to join the conversation.

  • one tenor
  • one tenor's Avatar
  • Offline
  • Forum Veteran
  • Forum Veteran
  • johnpcalex@gmail.com
More
27 Apr 2017 22:31 #12 by one tenor
Replied by one tenor on topic A new fuselage for my Depron Super Cub
Gotcha Thanks

Anything will fly given enough power

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
03 May 2017 10:43 - 03 May 2017 10:44 #13 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Maiden yesterday but with the CofG a bit too far back and coupled with the Supercub's notorious adverse aileron yaw it was a bit of a pig to fly but still finished the session in one piece.
The battery will be moved forward - there is plenty of room.
I will also change the rx from 35 meg to 2.4 so I can programme in some rudder with the ailerons which is actually what it had before but then the rudder as mechanically linked to the ailerons. ;)
Last edit: 03 May 2017 10:44 by Quorneng.
Thanks: boz

Please Log in or Create an account to join the conversation.

  • Quorneng
  • Quorneng's Avatar Topic Author
  • Offline
  • Forum Master
  • Forum Master
More
03 May 2017 20:30 #14 by Quorneng
Replied by Quorneng on topic A new fuselage for my Depron Super Cub
Now pictures are enabled this is how the Supercub ended looking like.

Still some minor paint touch ups to do.
Attachments:
Thanks: Eric, boz, Firewood

Please Log in or Create an account to join the conversation.

More
03 May 2017 20:39 - 03 May 2017 20:40 #15 by Eric
Replied by Eric on topic A new fuselage for my Depron Super Cub
Adverse yaw - if you can, reset the servos - either electronically or mechanically, to give you a lot of up ail, and hardly any down. That puts the drag on the down-going wing side - standard glider practice.

if you are calm and collected when all about you are going berserk - you've missed something important!
Last edit: 03 May 2017 20:40 by Eric. Reason: added a word
Thanks: boz, Firewood

Please Log in or Create an account to join the conversation.

Time to create page: 0.249 seconds