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patmat2350 · Mar 19, 2006, 02:49 PM

It's been mostly done for a couple years, but I avoided making the turrets for a long time... did that a while ago:
http://www.rcgroups.com/forums/showt...vacuum+forming

Last real job was to make the twin-50's inside the turrets... finally did it! And now I'm ready to go to the Toledo show in April.

More info at http://www.geocities.com/patspt41/

Pat Matthews

cyclops2 · Mar 19, 2006, 04:03 PM

Nice weather job !

I thought the Elco had 3 tiny old paddle style rudders. Higgins had the biggie deep spade types.

Nice detail on the stern deck !

hotjava · Mar 19, 2006, 04:09 PM

Pat,

Awesome!!!
I really love the turrets!

Oliver

jeepers1940 · Mar 19, 2006, 04:19 PM

A real masterpiece, Pat. An especially fine job on the Dewandre turrets. Thanks for sharing her with us.
Bill

patmat2350 · 04:51 PM

Thanks all!

Quote:

Originally Posted by cyclops2

Nice weather job !

I thought the Elco had 3 tiny old paddle style rudders. Higgins had the biggie deep spade types.

Mine are quite a bit over scale, and the boat still won't turn worth a hoot.
See scale drawing attached, builder's drawing from the National Archives.

And photo of the Higgin's deep rudders. Note three same-handed props... same was done on Elco, simpler transmissions that way.

But real PTs COULD turn... check the 80 footer, above, in this ad. And the 80's were said to handle worse than the 77's!

PM

Old 8140 · Mar 19, 2006, 04:42 PM

One word for this build ~~~ AWESOME !!!

Pat, great job.

Jim

cyclops2 · Mar 19, 2006, 05:04 PM

Pat
My 8' Higgins has over sized twin rudders, 20 % and twin screws.

At full speed, hard over is a instant bank into the turn and in 20 + feet, it is comming back at me. Out of the hole and on plane in 2 seconds.

What you and I have as turn differences agrees perfectly with WW II PTB captains who ran both types.

Thumbs up to us both.

patmat2350 · Mar 19, 2006, 05:59 PM

Quote:

Originally Posted by cyclops2

Pat
My 8' Higgins has over sized twin rudders, 20 % and twin screws.

Let's see that thing!
PM

Kmot · Mar 19, 2006, 07:35 PM

Awesome job!

ThrustTugKeith · Mar 19, 2006, 08:31 PM

It looks the same to me as when I first saw it.....

And I can tell you firsthand...it goes like stink (our term for fast)!!!!!!

Scott

cyclops2 · Mar 20, 2006, 11:34 AM

Pat. I think your turn problem is simple to cure and make yours actually out turn mine.

The bottom of the rudders in the picture are triangles. The have very little blade area in the props high flow area .
I can send you some scans by email of my rudders. I will take one off and you will see that they reach below the bottom of the 4.5" 5 blade props. They just clear the bullet tail piece.

I have the largest sailboat servo as the rudder servo to prevent sucking the rudder into a reversing prop. Overbalance of the rudder is 25 %.

Let me know if I can help more on the rudder.

Rich

cyclops2 · Mar 20, 2006, 11:38 AM

Pat. I found some model pictures. I can scan them to you . I tried posting them and got frustrated.

patmat2350 · Mar 20, 2006, 12:37 PM

Cyclops- if you have the pix as files, you can post 'em!
Just click on "Go Advanced", below;
scroll down to "Manage Files", click on "Manage Attachments".
Trick- after browsing and finding the files, you MUST hit "Upload", then wait a bit. It'll let you know when it's done;
Then "Close This Window";
Then "Submit reply".

Not hard, just not obvious...

PM

patmat2350 · Mar 20, 2006, 12:51 PM

Quote:

Originally Posted by cyclops2

Let me know if I can help more on the rudder.

Rich

Rich-
Yup, I'm sure that's it. The Midwest PTs have huge round rudders, set in the prop's path. Mine would just have to be so big to get down there, yuk. They're already like 200% big!
Well, if I really want zig-zag, I guess I can get a zip-zap racer.

PM

cyclops2 · Mar 20, 2006, 01:46 PM

The depth to the bottom of the prop is all important. As the rudder goes deeper, so does the boats leaning into the direction of the turn.

I can email the shape off of my plans to you to scale down or up as needed.

You will really enjoy the boat when she leans in on plane.

Go for it.

Mar 19, 2006, 02:49 PM	#1
patmat2350 One apostrophe may be too many Motor City Joined Dec 2004 10,930 Posts	Finally finished my PT Boat! It's been mostly done for a couple years, but I avoided making the turrets for a long time... did that a while ago: http://www.rcgroups.com/forums/showt...vacuum+forming Last real job was to make the twin-50's inside the turrets... finally did it! And now I'm ready to go to the Toledo show in April. More info at http://www.geocities.com/patspt41/ Pat Matthews Images View all Images in thread Views: 203 PT-41 carried MacArthur out of the Philippines. She's a 77 foot Elco, and represents the boat as delivered from Elco to the Navy in July 1941. This is the >>> ONLY <<< time Elcos carried the big bow numbers. Views: 187 Early Elcos were equipped with the Disney-designed mosquito emblem on the cabin. Views: 223 Views: 179 Elco built one of these special cradles from I-beams for each boat shipped out; they went out as deck-cargo on tankers. Views: 194 Funnels, torp tube doors are resin castings. Turrets are vac-formed. Views: 233 This shot shows the only non-scratch built parts on the model- the props and the flag!

Mar 19, 2006, 08:31 PM	#10
ThrustTugKeith Custom Course Wrecker.. Joined Dec 2004 413 Posts	Pats PT It looks the same to me as when I first saw it..... And I can tell you firsthand...it goes like stink (our term for fast)!!!!!! Scott

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Mar 19, 2006, 04:03 PM	#2
cyclops2 Registered User United States, NJ, Frenchtown Joined Mar 2003 7,836 Posts	Nice weather job ! I thought the Elco had 3 tiny old paddle style rudders. Higgins had the biggie deep spade types. Nice detail on the stern deck !

Mar 19, 2006, 04:09 PM	#3
hotjava Hotjava Norcal Joined Aug 2002 184 Posts	Pat, Awesome!!! I really love the turrets! Oliver

Mar 19, 2006, 04:19 PM	#4
jeepers1940 Registered User Madison, MS Joined Oct 2004 2,411 Posts	A real masterpiece, Pat. An especially fine job on the Dewandre turrets. Thanks for sharing her with us. Bill

Mar 19, 2006, 04:42 PM	#6
Old 8140 "Old 8140" Arizona Via NH Joined Mar 2005 279 Posts	One word for this build ~~~ AWESOME !!! Pat, great job. Jim

Mar 19, 2006, 05:04 PM	#7
cyclops2 Registered User United States, NJ, Frenchtown Joined Mar 2003 7,836 Posts	Pat My 8' Higgins has over sized twin rudders, 20 % and twin screws. At full speed, hard over is a instant bank into the turn and in 20 + feet, it is comming back at me. Out of the hole and on plane in 2 seconds. What you and I have as turn differences agrees perfectly with WW II PTB captains who ran both types. Thumbs up to us both.

Mar 19, 2006, 07:35 PM	#9
Kmot Grumpa Tom United States, CA, Los Angeles Joined Sep 2003 21,902 Posts	Awesome job!

Mar 20, 2006, 11:34 AM	#11
cyclops2 Registered User United States, NJ, Frenchtown Joined Mar 2003 7,836 Posts	Pat. I think your turn problem is simple to cure and make yours actually out turn mine. The bottom of the rudders in the picture are triangles. The have very little blade area in the props high flow area . I can send you some scans by email of my rudders. I will take one off and you will see that they reach below the bottom of the 4.5" 5 blade props. They just clear the bullet tail piece. I have the largest sailboat servo as the rudder servo to prevent sucking the rudder into a reversing prop. Overbalance of the rudder is 25 %. Let me know if I can help more on the rudder. Rich

Mar 20, 2006, 11:38 AM	#12
cyclops2 Registered User United States, NJ, Frenchtown Joined Mar 2003 7,836 Posts	Pat. I found some model pictures. I can scan them to you . I tried posting them and got frustrated.

Mar 20, 2006, 12:37 PM	#13
patmat2350 One apostrophe may be too many Motor City Joined Dec 2004 10,930 Posts	Cyclops- if you have the pix as files, you can post 'em! Just click on "Go Advanced", below; scroll down to "Manage Files", click on "Manage Attachments". Trick- after browsing and finding the files, you MUST hit "Upload", then wait a bit. It'll let you know when it's done; Then "Close This Window"; Then "Submit reply". Not hard, just not obvious... PM

Mar 20, 2006, 01:46 PM	#15
cyclops2 Registered User United States, NJ, Frenchtown Joined Mar 2003 7,836 Posts	The depth to the bottom of the prop is all important. As the rudder goes deeper, so does the boats leaning into the direction of the turn. I can email the shape off of my plans to you to scale down or up as needed. You will really enjoy the boat when she leans in on plane. Go for it.