Page Index Toggle Pages: 1 Send TopicPrint
Hot Topic (More than 10 Replies) create peanut scale spitfire (13") (Read 401 times)
terryman
5 Star Member
*****
Offline


I Love YaBB 2.5 AE!

Posts: 914
Location: Los Gatos, CA
Joined: Dec 27th, 2013
Re: create peanut scale spitfire (13")
Reply #11 - Nov 21st, 2020 at 11:01am
Print Post  
Rolf,

You could make the rudder adjustable but most builders would probably not bother at Peanut scale.  Let's see what other's say.  Other methods can be used for effectively changing the angle if you find it's needed during flight trimming: adding a small trim tab, steaming and bending or breathing on it and bending, or adding a gurney flap.  One trick is to use a minimum of solvent based glue to attach the rudder so if needed it can be removed using acetone to dissolve the glue and then remount at a different angle.  I have seldom needed to do so.  I would choose to make the elevator adjustable before worrying about the rudder.

The Spitfire may like having the weight of those blocks forward but I would carve them out as much as possible for lightness and if weight is needed to balance the model for flight would add clay or such as far forward as possible, in the nose block.

Scale elevator - If the actual life sized Spitfire was shrunk down to Peanut size the elevator would be to "scale".  That line on the plan shows how big to make the elevator if you want it to be scale sized.  If you want to fly the model the larger elevator on the plan will fly better.  The model with a scale elevator will be unstable in flight.
  
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
Re: create peanut scale spitfire (13")
Reply #10 - Nov 21st, 2020 at 8:34am
Print Post  
Thank you terryman and Sky9pilot, your tips helped me a lot while creating the fuselage. The next steps are to add the elevator and the rudder. But I have further questions first.

1.) Also I'm asking me if I have to make the rudder adjustable for the later trimming process. Could you please help?
2.) And I have a further question about the carved blocks on the fuselage: Is it necessary to hollow them to save weight or will it fly anyways?
3.) What is the "scale tail" at the elevator? Is it just a line painted on the tissue?

I have added the plan and highlighted the parts related to the questions.

Thank you!
Rolf
  

( 272 KB | 15 Downloads )
s-l16002.jpg
( 88 KB | 10 Downloads )
IMG_4127.JPG
( 152 KB | 9 Downloads )
IMG_4128.JPG
( 127 KB | 6 Downloads )
IMG_4133_001.JPG
( 162 KB | 7 Downloads )
IMG_4132.JPG
( 172 KB | 6 Downloads )
IMG_4134.jpg
Back to top
 
IP Logged
 
Sky9pilot
Administrator
*****
Offline


Stick & Tissue

Posts: 11904
Location: Kelso, WA 98626 USA
Joined: Jan 9th, 2010
Re: create peanut scale spitfire (13")
Reply #9 - Oct 31st, 2020 at 7:19pm
Print Post  
Terryman is probably right.  My photoshop rulers gave me deminsions of 1/16"x1/8" spars and dihedral/landing gear brace.  If using the solid wing ribs the hard 1/32" balsa would probably be suficient.  Just me.  I tend to build too heavy.  If you are using the upper tubulator strips I agree 1/32" square would be perfect.
  

( 345 KB | 26 Downloads )
speed-spitfire-1.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
Back to top
IP Logged
 
terryman
5 Star Member
*****
Offline


I Love YaBB 2.5 AE!

Posts: 914
Location: Los Gatos, CA
Joined: Dec 27th, 2013
Re: create peanut scale spitfire (13")
Reply #8 - Oct 31st, 2020 at 10:03am
Print Post  
rollov wrote on Oct 31st, 2020 at 4:02am:
Hi community,
I want to start to build the fuselage but I have a question regarding the ribs. Please see the red circles at rib "G". The slots are smaller than the one on the top of the rib. Which material I have to put in? Is it a strip of 1/32" balsa which joins rib "I", "H"
and "G"? Thx! Rolf


Rolf,

I agree the plan does not seem to say in writing what size of stringer.  1/32" square is common on Peanuts but the relatively long span between formers and the drawing suggest to me 1/32" x 1/16" on edge.

Nice wing!  I'm impressed by your sliced ribs of different lengths and lower camber.

Terry
  
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
Re: create peanut scale spitfire (13")
Reply #7 - Oct 31st, 2020 at 4:02am
Print Post  
Hi community,
I want to start to build the fuselage but I have a question regarding the ribs. Please see the red circles at rib "G". The slots are smaller than the one on the top of the rib. Which material I have to put in? Is it a strip of 1/32" balsa which joins rib "I", "H"
and "G"? Thx! Rolf
  

( 379 KB | 21 Downloads )
s-l16003_001.jpg
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
Re: create peanut scale spitfire (13")
Reply #6 - Oct 29th, 2020 at 3:14pm
Print Post  
Here are some pictures to show the progress. Not so easy to put all the parts together. I had some problems with the fit of the ribs and had to cut them again ... Huh But the wing is almost done. Smiley
Best, Rolf
  

( 122 KB | 16 Downloads )
IMG_4068.JPG
( 116 KB | 19 Downloads )
IMG_4078.JPG
( 94 KB | 18 Downloads )
IMG_4079.JPG
( 107 KB | 14 Downloads )
IMG_4082.JPG
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
Re: create peanut scale spitfire (13")
Reply #5 - Oct 16th, 2020 at 9:41am
Print Post  
Thank you Ian for the link to the magazine!
The balsa wood I've ordered arrived today. I will start to cut the parts for the wing tonight. Smiley
Rolf
  
Back to top
 
IP Logged
 
pb_guy
5 Star Member
*****
Offline


So I'm just a kid at heart.

Posts: 1715
Location: Youbou, BC, Vancouver Island
Joined: Oct 15th, 2014
Re: create peanut scale spitfire (13")
Reply #4 - Oct 11th, 2020 at 9:49am
Print Post  
Unless otherwise specified, assume that all material is 1/16" thick.
ian

You can download the magazine containing the plan and the article from:
https://rclibrary.co.uk/title_details.asp?ID=1941
  
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
Re: create peanut scale spitfire (13")
Reply #3 - Oct 11th, 2020 at 6:39am
Print Post  
Thank you Neal and Mike, your answers are very helpful for me and the things become clearer now. Also the pictures are good for understanding (the plane looks realy good btw.).
Now I'm searching for balsa but I don't know which material thickness I have to order for a model with 13" wingspan. In the plan is described that I need 1/32" for the fillets and the top combing for example. But which thickness do I need for other parts like wings and ribs?
Thank you in advance!
Rolf
  
Back to top
 
IP Logged
 
MKelly
5 Star Member
*****
Offline



Posts: 1054
Location: Helotes, TX
Joined: Apr 11th, 2017
Re: create peanut scale spitfire (13")
Reply #2 - Oct 9th, 2020 at 10:13am
Print Post  
Welcome Rolf!  Neal's got your questions covered pretty well. 

Regarding the wing fillets, if you choose to do them you'll just cut a piece of 1/32" balsa matching the triangular portion of your red-circled shape that lies behind the trailing edge of the wing.  That gets glued to the aft edge of the wing and fuselage and makes the bottom surface of the fillet.

On the top side you'll trim and fit a piece of ordinary printer paper to go between the wing, fuselage and bottom piece of the fillet.  The upper paper fillet can be broken up into a couple of segments to make it easier to smooth the curves (that's how the sheet metal was done on the real aircraft). 

This is usually an iterative process of fitting and trimming that'll take a couple of tries to get to where you're happy with it.  Here's a couple pictures of the fillet on a larger Spitfire model and the fillet on the actual aircraft.

Keep posting - looking forward to seeing your model come together.

Cheers,

Mike
  

( 70 KB | 39 Downloads )
0611_Mocked_Up_with_Doped_Flying_Surfaces_Cropped.JPG
( 143 KB | 32 Downloads )
0617_Fillet_Left_Side_Low_Cropped.JPG
( 102 KB | 30 Downloads )
44041147880_09099305ee_b.jpg
Back to top
 
IP Logged
 
Kerak
5 Star Member
*****
Offline


Build! Fly! Enjoy!

Posts: 2749
Location: Roy, Utah
Joined: Oct 5th, 2015
Re: create peanut scale spitfire (13")
Reply #1 - Oct 9th, 2020 at 8:49am
Print Post  
Welcome, rollov!  Red outline is of the wing fillet planview...no pattern for such seems to have been provided on plan.  I wouldn't trouble myself with that feature just yet.  The cross refers to the aircraft's longitudinal center of gravity...a proposed balance point necessary for successful flight trimming.  Again...not to be concerned with at this time during your build.  When the model is finished and you're trimming...you can add weight as necessary to achieve balance at that point.

Glad you've joined us!

Neal
  
Back to top
 
IP Logged
 
rollov
New Member
*
Offline


Build! Fly! Enjoy!

Posts: 6
Joined: Sep 29th, 2020
create peanut scale spitfire (13")
Oct 9th, 2020 at 7:13am
Print Post  
Hi S&T community!
I'm a beginner and want to build a spitfire from a plan made by Walt Mooney. But before I can start I have to understand all details of the plan. I've marked two parts with red colour - would be nice if you could explain.
1.) what is this outline? is it a part made from balsa wood?
2.) what means the cross? It seems to be related to the ribs C and G

I've more questions but that's it for the beginning. Smiley
Thanks in advance!
Rolf from Leipzig

  

( 294 KB | 50 Downloads )
s-l16003.jpg
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint