Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin  |  Contact Global Moderator
April 23, 2019, 08:20:58 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with email, password and session length
News: Help Support Hip Pocket Aeronautics Builders' Forum and Plan Gallery

You can help support our forum and gallery
by having plans printed by Ratz.

Details and Feedback here: Help Support the Forum & Gallery - Plan Printing
 
Home Help Search Login Register
Pages: [1]   Go Down
Print
Author Topic: Sharkies Machine 35  (Read 1097 times)
0 Members and 1 Guest are viewing this topic.
Sundance12
Model Airplane Builder
Global Moderator
Platinum Member
*****

Kudos: 70
Offline Offline

Canada Canada

Posts: 1,058


Topic starter
MAAC #25680, VE4BDF (amateur radio callsign)

WWW
« on: January 25, 2008, 03:56:46 AM »

I have been finishing the building of a new airplane called the Sharkies Machine 35 that I scaled up from my Sharkies Machine Embryo model and I have found that the airframe does not simply scale up and work out structurally in all ways. Based on the original drawing, I found that the first fuselage was 3/32 square longerons and uprights and that was way too weak a structure. In the second version, I made the fuselage from 1/8th square and this proved to be better for strength. The wing in the original embryo has one spar but I found in the 35 inch wing I had to increase it to two spars and now I am finding that I need some vertical shear web between the spars in the first three rib bays where the bending forces are the most. So far the design is going well otherwise. I will post more on this build later.
 
Here is much of the build on RCU
 
http://www.rcuniverse.com/forum/m_6798594/tm.htm
Attached files Thumbnail(s):
Sharkies Machine 35
Logged

Resources and tools for scratch builders and plans builders.
www.northof49tech.com
Dimeflyer
Platinum Member
******

Kudos: 55
Offline Offline

United States United States

Posts: 1,349



Ignore
« Reply #1 on: March 29, 2008, 10:29:22 AM »

Nice looking plane Sundance.
You say the future finish was not so good? I went over to future two years ago because of the smell of dope and it seems to work ok for me! Although I'm not real particular about a paint job, it doesn't seem all that bad and I use what the guys call domestic tish. After it drys it seems to give the tish a little more strength imo, but I'm no expert so it's just my opinion. I like the enlargement idea!
George
Logged
Sundance12
Model Airplane Builder
Global Moderator
Platinum Member
*****

Kudos: 70
Offline Offline

Canada Canada

Posts: 1,058


Topic starter
MAAC #25680, VE4BDF (amateur radio callsign)

WWW
« Reply #2 on: March 29, 2008, 11:22:22 AM »

Hi George:

With Future, it took weeks for the tissue to begin to shrink back to a tautness that I had when I shrunk with water. I also found that it took twice as many coats to get a non blotchy consistant finish. I am not so sure I want to try it again, but we shall see.

Sundance12
Logged

Resources and tools for scratch builders and plans builders.
www.northof49tech.com
Sundance12
Model Airplane Builder
Global Moderator
Platinum Member
*****

Kudos: 70
Offline Offline

Canada Canada

Posts: 1,058


Topic starter
MAAC #25680, VE4BDF (amateur radio callsign)

WWW
« Reply #3 on: May 11, 2008, 04:20:20 PM »

I have made some preliminary test flights in the front street with the GWS IPS 4:1 gearbox and 8:4.5 prop on 2S Lipos and I am more pleased with the results than I initally expected. It talkes off and climbs really well and has good control and reasonable turning performance. Pictures to follow after session two.

Sundance12
Attached files Thumbnail(s):
Re: Sharkies Machine 35
Logged

Resources and tools for scratch builders and plans builders.
www.northof49tech.com
Sundance12
Model Airplane Builder
Global Moderator
Platinum Member
*****

Kudos: 70
Offline Offline

Canada Canada

Posts: 1,058


Topic starter
MAAC #25680, VE4BDF (amateur radio callsign)

WWW
« Reply #4 on: May 13, 2008, 09:15:08 AM »

Flying pictures for this airplane.

Attached files Thumbnail(s):
Re: Sharkies Machine 35
Re: Sharkies Machine 35
Logged

Resources and tools for scratch builders and plans builders.
www.northof49tech.com
Pages: [1]   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!