Bronco Type XXIII in 1/35th scale

[roedj]

David,

Thanks, I'll take a look at that link.

Yes it's the Gordon Lewis/ Norbert Brüggen kit. A lot of people just extend control rods out through the rear part of the hull for both the Kort nozzle and the rear dive planes. Too easy - LOL. I am trying to figure out how to make all the control linkages internal to the hull. I may just hurt myself.

I'm still working on the Sheerline IID kit although the milling process for all the freaking holes is taking way longer than planned but I will finish it by spring 2014 if I can. I've told my model train buddies not to expect anything out of me for at least a year as I have way too many naval projects in the queue.

Glad to be back,

Dan

Dan

[He Who Shall Not Be Named]

David,

You mentioned in post #141 a rack and pinion gear set for the XXIII rudder. I am looking for a very small right angle drive of any type for a Kort nozzle control on another sub - German Type 202. Is your gear set a commercial item or are you making it yourself? If commercial (as is my hope), what is the source?

Dan (resurfacing from model train world)

Hey, Dan!

Welcome back to the Dark Side. I'll make my own rack from plumbers putty (guess how?!).

A good sorce for your bevel gears is, Stock Drive Products https://sdp-si.com/eStore/

The 1/32 kit?! ... I got one of those.

David

[roedj]

David,

You mentioned in post #141 a rack and pinion gear set for the XXIII rudder. I am looking for a very small right angle drive of any type for a Kort nozzle control on another sub - German Type 202. Is your gear set a commercial item or are you making it yourself? If commercial (as is my hope), what is the source?

Dan (resurfacing from model train world)

[He Who Shall Not Be Named]

Looking good David! A big improvement over what Bronco supplied with the kit! I understand why you chose the rake and pitch on the blades that you did. As your drive motor is a Speed 480 or 500, something like that?

If one wanted to attempt to match the rake and pitch of the real prop, do you think one of those 40mm diameter, low RPM, high torque, built-like-a-brick-oven Pittman motors could handle it? I would think one of those Pittmans with a 2:1 gear or belt reduction would produce some monstrous torque. At nominal voltage their motor shaft is spinning at less than 6000 RPM.

Steve

Yes to all the above. But, let's not get bogged down in three-degrees of rake and a few feet of pitch ... no one's got a Bronco Type-23 into the water yet. Move on! Onward ... Into Infinity!

David

[He Who Shall Not Be Named]

Yuck, i can't stand this, i hate you David


Manfred.

LOL!

I find your Rube Goldberg, Inquisition inspired, Type-23 linkage thing-a-ma-jig equally disturbing, sir!

David

[Warpatroller]

Looking good David! A big improvement over what Bronco supplied with the kit! I understand why you chose the rake and pitch on the blades that you did. As your drive motor is a Speed 480 or 500, something like that?

If one wanted to attempt to match the rake and pitch of the real prop, do you think one of those 40mm diameter, low RPM, high torque, built-like-a-brick-oven Pittman motors could handle it? I would think one of those Pittmans with a 2:1 gear or belt reduction would produce some monstrous torque. At nominal voltage their motor shaft is spinning at less than 6000 RPM.

Steve

[MFR1964]

Yuck, i can't stand this, i hate you David


Manfred.

[He Who Shall Not Be Named]

Assembled propeller master. Not enough rake, and the lower pitch I selected (not wanting to over-burden the drive-train) account for the difference between the propeller aboard the Type-23-in-the-air and my propeller. **** it. I'm good with it.

[He Who Shall Not Be Named]

Now We're cooking! Great find, Warpatroller!

That one shot -- and particularly your good work pushing my hub onto that shot -- of the Type-23 in the air, so clearly showing the wheel, makes things crystal clear. And what a break: I was too tired last night (actually, early morning) to continue, so the existing hub is still virgin; I have not mounted any blades to it yet. So, it will be an easy matter to slap it once again on the lathe and turn the hub to the correct form.

Excellent work, my friend -- you're making me look good!

And, fortunately, I had not yet trimmed the blade blanks for the fat hub, so I can project their roots the extra 3mm or so to reach into the smaller diameter hub. Sometimes, things just work out! Your mastery of drawing tools, and determined researching has saved the day.

I thank you!

David

[Warpatroller]

Yes, Warpatroller, I think were reasonably close. This closes out today's work.

[ATTACH=CONFIG]19104[/ATTACH][ATTACH=CONFIG]19105[/ATTACH][ATTACH=CONFIG]19106[/ATTACH][ATTACH=CONFIG]19107[/ATTACH][ATTACH=CONFIG]19108[/ATTACH][ATTACH=CONFIG]19109[/ATTACH]

After reviewing your latest photos, I think you were too influenced by the Bronco hub when you fabricated yours.. This prop will end up on two of my models, so I am doing a little steering here.. Please bear with me. Hopefully you have not yet finalized the prop hub.. Even if you have to make a second one, it will be worth it, to have the most accurate looking XXIII prop on a functional RC model, made by you of course..

I did some Photoshop work to show my suggested modifications to your existing prototype hub:




1st Hub (Bronco Inspired) shown on boat


2nd Proposed Hub (GOD HUB) shown on boat


The Real Hub


Pattern for the GOD HUB


Will be watching with interest to see how this all turns out.. :pop

[He Who Shall Not Be Named]

Yes, Warpatroller, I think were reasonably close. This closes out today's work. And that's it for the weekend -- tomorrow I catch up on some long promised work for Mamas: SD's for his fantastic STINGRAY.

[Warpatroller]

Excellent! I was looking at the photo again of U2326 laying on your table. You can see a blade at the six o'clock position directly above the lower rudder support. Manfred posted a copy of this photo in his thread showing good detail back there. I think you have nailed it Sir! Looking great!

Some info regarding the boat in the photo - U2326 was surrendered at Dundee, Scotland in May of 1945. She later became the British submarine N35. Was given to the French in 1946, where she sunk, in early December 1946, during an accident at Toulon. As such, I believe she is still resting there as a military grave..

[He Who Shall Not Be Named]

update:

[He Who Shall Not Be Named]

Agreed, I can do the bit-over-51mm thing. I've got the finished blade blank in rubber, should have the three bladed propeller master almost done by bedi-by time.

[Warpatroller]

Listen to yourself! I'm calling the anal-retentive police on you! 50mm it is. Done!

I just became a Subcommittee member, only to find my old post from 5 years ago in the "General" non-member section of the forum lol. I had answered a question asked by Kazzer, of all people, regarding propeller diameters..

The 1:1 XXIII Propeller diameter is 180cm!

1:35 = 51.42mm! So, 51mm should do it! Regardless of the Anal-Retentive Gestapo, this XXIII fittings kit must be a masterpiece of craftsmanship, so it is worth stressing some over the fine details.