Notices
Scratch Building, Aircraft Design, 3D/CAD If you are starting/building a project from scratch or want to discuss design, CAD or even share 3D design images this is the place. Q&A's.

question about plans

Old 07-19-2021, 01:05 PM
  #1  
hawkman-RCU
Thread Starter
 
Join Date: Sep 2002
Location: phoenix, AZ
Posts: 200
Likes: 0
Received 1 Like on 1 Post
Question question about plans

ive been building and flying kits and scratch built since 1981. im wanting to make a sig hummer three times larger. can i take the original plans somewhere and have them blown up. thank you.
Old 07-19-2021, 11:22 PM
  #2  
Hydro Junkie
 
Hydro Junkie's Avatar
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 9,545
Likes: 0
Received 85 Likes on 82 Posts
Default

Most blueprinting shops can do that for you though they may not be able to do it all on a single width of paper. Keep in mind that you will probably have to add more ribs and maybe a second spar to keep the wings strong enough to lift the plane. This was well illustrated when Sig blew up one of their designs, only to have the wing fold up on it while in flight
Old 07-20-2021, 08:44 AM
  #3  
hawkman-RCU
Thread Starter
 
Join Date: Sep 2002
Location: phoenix, AZ
Posts: 200
Likes: 0
Received 1 Like on 1 Post
Default thanks

thank you hydro, and thanks for the advice about more ribs and spars..
Old 07-26-2021, 06:32 PM
  #4  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Happy Valley, Oregon
Posts: 8,254
Received 89 Likes on 83 Posts
Default

That puts you with a wingspan over 100”. I think it would be best to do plug in wings that are balsa sheeted foam. Much easier to do in this scale and actually stronger/lighter then built up wings.
Old 07-26-2021, 07:16 PM
  #5  
hawkman-RCU
Thread Starter
 
Join Date: Sep 2002
Location: phoenix, AZ
Posts: 200
Likes: 0
Received 1 Like on 1 Post
Default

thanks speedracer. i will consider that option.
Old 08-02-2021, 08:34 AM
  #6  
mgnostic
 
mgnostic's Avatar
 
Join Date: Jan 2003
Location: Kamay, TX
Posts: 1,230
Received 19 Likes on 18 Posts
Default

Originally Posted by Hydro Junkie View Post
Most blueprinting shops can do that for you though they may not be able to do it all on a single width of paper. Keep in mind that you will probably have to add more ribs and maybe a second spar to keep the wings strong enough to lift the plane. This was well illustrated when Sig blew up one of their designs, only to have the wing fold up on it while in flight
Hydro Junkie has a good point. There is nothing wrong with popping over to Outerzone and having a look at sport planes with a 100 inch wing or there abouts. It's not that difficult to add the extra spar along with shear webs and center section reinforcement.
Old 08-06-2021, 04:37 AM
  #7  
Bill Diedrich
 
Bill Diedrich's Avatar
 
Join Date: Jul 2006
Location: Ventress, LA
Posts: 1,518
Likes: 0
Received 10 Likes on 10 Posts
Default

Having looked at the assembly instruction manual online, I think that it would also be advantageous
to put full span webbing on the main wing spars and also possibly do some diagonal bracing out into
the wing. I agree on the wing tube idea and 3-piece wings, easier to transport and an overall stronger
wing. Consider sheeting the wing forward of the main spar which is known as a "D" tube once the webbing
pieces are installed between the top & bottom main wing spars. I would also recommend the main spars
be out of Basswood or Spruce instead of balsa.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.