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F4F Dime Scale drawing first time (Read 160 times)
Reply #9 - Feb 15th, 2020 at 5:14pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

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Tom, good advice to know. This has been fun so far, Ive even gone on a search for other a/c that have not been kitted / planned for dime scale. alf sent me to the blue print .com and its been a trove of stuff.

Bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #8 - Feb 15th, 2020 at 4:03pm

Sky9pilot   Offline
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Bob,
Looks good with nice clean sharp lines.  In my research most enlargment of stab on scale models has to do with increasing the span of the stab and keeping the root rib distance and fuselage attachment area the same for the semi-scale appearance. I don't want to be critical, I just want to be an encouragement to you.  It seems an enlarged root area  also changes the tail moment (distance from L.E. of wing to L.E. of stab) unless you move the stab back in the fuselage mount. Then this makes the trailing edge extend beyond the normal scale position (with the larger root rib).  This is what I've found in my research to begin designing scale/semi-scale model aircraft. Doesn't really apply to an original design of a sport model. Hope this is helpful.
Sky9pilot
 

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
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Reply #7 - Feb 15th, 2020 at 1:49pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

Posts: 6281
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I blew the stab up by 20%.

 

STABS.pdf (302 KB | 14 )

IF IT AINT BROKE DONT FIX IT!
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Reply #6 - Feb 13th, 2020 at 6:19pm

Sky9pilot   Offline
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I'm trying to remember what Don Ross said in his book "Rubber Powered Model Airplanes" Click Here I can't find my copy after my moves.  I believe it was +2 degrees to +3 degrees.  I usually use +2 then the horizontal stab I leave at 0 degrees parallel to the thrust line of the model. I then leave some room in the stab slot for adjustment as needed with shims till trimmed.
This off the top of my head.
You might want to read this article by Charles Hampson Grant found here discussing down thrust from his book "Model Airplane Design and Theory of Flight" Click Here  It took me several reads before it begain to make sense!  So give it some time.
Sky9pilot
 

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
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Reply #5 - Feb 13th, 2020 at 5:53pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

Posts: 6281
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What would be a normal wing incidence? I put 3+.

bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #4 - Feb 13th, 2020 at 5:16pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

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alf, thank you for the bulkhead views.

Here is what Ive done so far, 294% enlarged 3 view from an earlier post then tracing paper on top. I cannot find my protractor so I printed one out from online.

Bob
 

F4F_3V_004.jpg (359 KB | 5 )
F4F_3V_004.jpg

IF IT AINT BROKE DONT FIX IT!
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Reply #3 - Feb 13th, 2020 at 3:01pm

alfakilo   Offline
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Retired USAF and TWA.
St Louis, MO

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Don't know if this has been mentioned before, but a website called the-blueprints.com has a good number of 3 views, especially for the F4F. Some show fuselage cross-sections, helpful in making formers.
 
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Reply #2 - Feb 13th, 2020 at 2:42pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

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pb_guy wrote on Feb 13th, 2020 at 11:40am:
Good start Bob, are you going with a box fuselage with curved formers glued to the box, or Keel and formers?
ian


I am not sure which, so Ill draw both.

Bob
 

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Reply #1 - Feb 13th, 2020 at 11:40am

pb_guy   Offline
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So I'm just a kid at heart.
Youbou, BC, Vancouver Island

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Good start Bob, are you going with a box fuselage with curved formers glued to the box, or Keel and formers?
ian
 
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Feb 13th, 2020 at 12:19am

bigrip74   Offline
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What did l do this time!
Austin, Texas

Posts: 6281
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This is what I was able to do using the help of Ian, Tom,
Alf, Al from HPA.

Was able to scale up a 3 view then tape it together. Now to start drawing the formers.
 

F4F_3V_001.jpg (190 KB | 4 )
F4F_3V_001.jpg
F4F_3V_002.jpg (190 KB | 6 )
F4F_3V_002.jpg
F4F_3V_003.jpg (145 KB | 4 )
F4F_3V_003.jpg

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