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Very Hot Topic (More than 25 Replies) 3/4" scale, Lockheed Hudson bomber....50" (Read 652 times)
Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #37 - Today at 9:18am
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Routed out the T slots....got one "wiggle"...but it's in a starting area...so problem. Broke 2 bits and was on my last one, but it lasted.... Tongue
Now to get all the bolts I need, and drill the holes in the cross pieces.....
This was the hard part....what could of messed up 50 bucks worth of mat'ls...so I'm super happy it's done! Grin
Marc
  
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #36 - yesterday at 1:01pm
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Looking forward to the jig progress!
  

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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #35 - yesterday at 8:27am
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Progress!...I finally did get my building jig basic wood....Jacob's son, Joe, cut out 2 'tables' for me outta the one piece of birch plywood...with perfect cuts. He also cut 30+ 1"x1" cross members from the scrap pieces....now I need to route the slots in each table, and drill all the bolt holes in those cross 1"x1" pieces~
I planned on doing this Friday...but 1st things 1st....the wife's Z24 has a small leak somewhere in the clutch hydraulics...so it needs to be looked at, and at least refilled and air bled out....maybe, I will have time to jig and route the slots....I want to do it right the 1st time...I have $$ tied up in it, PLUS, Joe, wanted Pizza, NOT $$$... Grin for cutting out this project.....the Amish don't get pizza delivery.....no phone to call it in!!!! Cheesy
ill do some pictures in progress......easier to understand....
I should be getting closer to my Bomber start!!!!!! Tongue
marc
  
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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #34 - Feb 21st, 2021 at 4:58am
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Thank you sky Pilot!....I have been trying to think of how to use my jig and lay out the huge formers...your post of Dave mitchel's technique finalized my questions!
My fuse needs to be super light but strong.....and straight. I'm feel like rod sterling is asking me to journey into the Twilight Zone Grin
What was bothering me was how to keep my top/bottom keel true to shape, and the side keels equal/true to shape. Tongue
I didn't what to resort to a box fuse with formers, (extra weight), but Dave uses his top/bottom keels laid out ON the plan...temp glue sticks, then clamp THEM into my box, marking center line..which keeps the fuse aligned Smiley
Then add all the top stringers, remove from box, flip over and reclamp in box,,,add as many as possible, then remove and add the rest of the stringers. Remove the cross pieces...done!

We had a major snow here in lower Tn...same storm went thru Texas came here. I couldn't get outta my neighborhood...I lost a week of work, but still, I faired better than a lot of poor folks...but I couldn't get to Jacobs to get my box...maybe this Saturday....but now I will start cutting formers/keel pieces....now that I know how to use them!
Thanks again skypilot!
  
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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #33 - Feb 18th, 2021 at 1:51pm
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Power package chosen?...I just need to get another motor and esc....
  
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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #32 - Feb 10th, 2021 at 3:21pm
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A BIG thank you to member KIWI over at the other site~ Nevell has sent a set of blueprints/photos that shows the true fuselage shape. She is a slimmer bird than my plans shown....but with a flatter bottom...the bomb bay area will be easier to make, and the rear gunner door!
My templates will be re-drawn, and soon.....I will have my jig finished, and will start this project!
I can slip a pair of 3 blade 6" props in...it's close, so power will be great.

for now...more re-search'in! Cheesy
marc

  
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #31 - Feb 8th, 2021 at 11:35am
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I think 1/16" sq would be adequate.  If you think more strength is necessary you could use 3/32" sq stringers at the dorsal, ventral and horizontals locations and 1/16"sq inbetween these stringers. Just thinking outloud.

Check out Mike Stuart's Beech King Air with outboard detachable wing panels: Click Here

Here's the link to his plans for the King Air: Click Here
He has some great pics of the tongue and socket setup for the outer wing panels.
  

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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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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #30 - Feb 7th, 2021 at 8:38pm
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Tom, I have kicked some ideas around....I believe the best is to have one bulkhead former made from 1/32 ply that has 'arms' that will mate with the front wing spar....or something like this...and I know engineering wise, I can make the engines part of the wing permanent with the fuse...the outer panels removable.
I haven't seen any pictures that show any wing flaring....just plain to mate the wing to the fuse???....maybe all this will work.

Tom, what size of stringers would you use? 1/16"?
  
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #29 - Feb 7th, 2021 at 4:14pm
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Are you building a box for the spars to fit into with removable wing panels?  I'm still not clear on just how your wing will be constructed.  Solid center section with engine nacelles/removable outer wing panels?  Just curious on how the center section will be fitted to the fuselage?  This is a center/mid wing setup.  Will you leave open top or bottom of fuselage for placement of the wing??   Not sure just how you are approaching this construction.
Sky9pilot
  

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And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #28 - Feb 7th, 2021 at 12:44pm
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Kiwi...pm sent Smiley
Been working between the Astra plans and Cleveland plans. Down loaded multiple 3 views...seems there's a small discrepancy between them...I'm making a MK III with the Brit turret and lower gun deck.
The Astra plans are nice, but the WS in not to scale, like 5" short!...but it is a scratch build, so it shows lots of formers and ribs etc.. Smiley
The Cleveland plan has much more scale details, and correct WS and elev/rudder are correct. Nice details of how to hinge surfaces too!
Both plans didn't have the mid-bottom correct. The Bombay door are needs to have its correct radius to fill them bays up!....so I've been drafting and cutting formers all morning. It snowed 2-3" last night here in lower Tennessee, and still cold outside. So I'm fully involved in my balsa wagon plans today Cheesy
Here's my progress, I have 12 bulkheads cut out on paper, they still need to have the stringer cutouts marked. I haven't decided what size and how many.....I'm looking for a light bird...please tell me size and distance you would do....keep in mind, she's 30" long, and 6" tall...
I will plan a bulkhead to mate with the main spar(there will be a forward main spar, and a smaller rear spar) so no real 'wing saddle' plate will be needed....just small amount of 1/20" to anchor the covering to at wing roots.




Really enjoying this build....it has a lot of engineering to work out!
Marc
  
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #27 - Feb 6th, 2021 at 9:06pm
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I've got some drawings so PM me with your email addy and I'll send you a scan.
  

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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #26 - Feb 6th, 2021 at 6:55pm
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Progress...slowly, I got the wood for the jig table, and the 1st of the week I will get Jacob to cut it out...I look forward to having it...fuselage straightness will be a everyday thing! Cool
Meanwhile, I have a stagger bee to finish....and a small repair job for a friend...


I also got 2sets of rubber plans now, so my 3views and these plans, I will draw out my formers....
  
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Kaintuck
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #25 - Feb 5th, 2021 at 4:13am
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Now I'm working on my jig table, box store sells 3/4" sanded birch ply in 24"x48" sheet....perfect for my table. Jacob should have the poplar base soon, so I will try this weekend to get to the box store.
I think I will cut a opening like 10"x40" and route the T slots in the ply. I looked at different companies that sell the metal T slots Tongue $50 for just the 2 48" pieces Cool if I went that route, all my parts would cost around a hundred bucks.....not in my budget!
So, getting a board, routing the slots( I have a B&D router)...then getting Jacob to cut me 24 pieces for the holding blocks....and I should be in biz Smiley
  
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #24 - Feb 4th, 2021 at 12:32pm
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I think around the wing root area would be fine and you're right the outer extremities both towards the nose and tail don't really need to be as strong!  Talking of retracts sounds exciting!  I do look forward to the progress.
  

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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Kaintuck
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Controled landings are
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Re: 3/4" scale, Lockheed Hudson bomber....50"
Reply #23 - Feb 4th, 2021 at 10:16am
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tom, I thought about that, there is a lamination of the 1/16"balsa x 2 w/styro sandwhiched weighing in at 2.7gm. this is a balsa width of 3/8".(any less width, and the balsa is very delicate....more 'indoor' type of build I guess.)
Tom, I could try and weigh one more example of just 2 laminations of balsa, alternating the grain....but what I'm seeing and feeling, is this balsa/styro/balsa at 3/8"width and using 1/16" sheet...seems like a good central strength former, especially around that wing saddle..and that extra piece of styro weigh almost nothing!!!!..the nose can be just balsa, and the tail area, just 1/16"x 3/8" balsa bulkheads. the stringers get closer together toward the tail, so they will be making that area strong.
I'm looking to have my 1st twin with retracts, wow....super excited to see if we can get a light wing loading~ as in a almost~twin engine "floater" Grin Grin Grin
marc
  
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