Patrick Matthews


3D modeler, Product designer, Maker
R/C Model Boater!

1:24 Scale 50cal Machine Gun Set for Elco PT Boat
patmat2350 @Bubba84 Pray tell, what model needs 1:29 parts?
patmat2350 commented on 50cal BMG Set, multi scale by patmat2350
August 11, 2017
50cal BMG Set, multi scale
patmat2350 @ELCOPT Rest assured, the vast majority of the cost goes to Shapeways, and not to me, the designer, for these parts WHICH ARE CUSTOM PRODUCED TO ORDER USING ADVANCED PROTOTYPING PROCESS. I make my designs available to others to help them out, since no one else offers them through more affordable processes that involve hard tooling. Regarding size: I can assure you that the parts are correct to the stated scale; did you order the correct scale? Perhaps you ordered 1:24 parts instead of 1:20? The scale must be selected at time of order. If you did order 1:20, please let me know what appears to be too small.
Mk18 Torp Tube Breech Door Set, Multi-Scale
patmat2350 @Boinkffd: I'm afraid you'll need to measure that wood "tube" to find out. The part diameter is given above.
patmat2350 @Boinkffd: As described, this item fits 3/4" PVC pipe for the 1:20 scale Dumas kit.
patmat2350 @mechwerkandi No, the tube is not much bigger, it is thin wall steel... about 1/4" [6.3mm]. Your reference is a secondary source... I have the original Elco torpedo tube drawings. The actual inside diameter of the breech collar is machined to 21.41 inch... 27.2mm in 1:20 scale... actually slightly smaller than the (approximate) tube outside diameter I mentioned below. Regardless, these parts are sized to fit 3/4" PVC pipe, which is commonly used by modelers for 1:20 scale PT boats.
patmat2350 @mechwerkandi Yes really. The actual tube outside diameter was 21.75 inch; /20 = 1.088 in = 27.6mm. 3/4 inch PVC pipe is used in the Dumas 1:20 kit; it has an OD (outside diameter) of 1.055" = 26.8mm. For R/C use, I highly recommend using thinner material, as the PVC pipe is quite heavy. I used a lathe to bore out the PVC pipe, and removed about 1 kg. with four tubes.
1:24 scale 20mm Oerlikon Pedestal, Late
patmat2350 @1walt Sorry, I don't have the design tools to do "soft" items... look up my buddy Holden8702. Pedestal- this one is 1-5/16" tall in 1:24... and very close to 1-1/16" diameter (not counting the foot rests). It looks right to me, while another 9/16" height would seem like too much. Until I get to touch and measure a real one in person, I'll remain dubious of all drawings.
Check out my latest big propeller! - Propeller 3.33" RH, for 1:6 scale Monterey Clipper


We're sorry to inform you that we no longer support this browser and can't confirm that everything will work as expected. For the best Shapeways experience, please use one of the following browsers:

Click anywhere outside this window to continue.