1/72 Revell Of Germany Type-9 .... It Starts!

[Scott T]

If you don't mind what are the diameter of your gears. And
do you have a photo of the gears set in place. If this information
is proprietary no problem. Did a little sketch in CAD. It makes me
appreciate the design work you do.

Scott T

[He Who Shall Not Be Named]

If you don't mind what are the diameter of your gears. And
do you have a photo of the gears set in place. If this information
is proprietary no problem. Did a little sketch in CAD. It makes me
appreciate the design work you do.

Scott T
[ATTACH=CONFIG]24698[/ATTACH]

I don't mind sharing information about the Craft at all. Nothing I do in the shop is proprietary -- there are no secrets here (only fools who think there are secrets!). On the other hand: client lists, price structure, vendor relationships, discounting schedules, announcement strategy, that sort of thing -- those are proprietary and are dealt with by my Boss, Mr. Caswell.

The nylon spur gears I use are from Stock Drive products, they are 13/16" diameter, 1/8" thick, bored for a 3/16" shaft and have 36-teeth. The soft brass pinion gear is bored here to make an interference fit to the motor shaft and has 11-teeth. This gear combinations gets me close enough to a 3:1 ratio as to not matter about the loose change.

Pencil and paper tends to drive the subject matter into your skull better than moving that ****ing mouse around while you look at the pretty pictures the computer produces for you! Hand's on, pal. Hands on! You want to get better at your craft? Put the god-damned mouse and 3D printer away! Get your hands dirty, scarred and calloused. Learn lay-out, pattern making, tool making, part assembly, scribing, filling, contouring, and finishing and you'll be a better man for it.

(have you ever noticed the number of guys who promise 3D/CNC produced kits and such, but never manage to pull themselves away from the keyboard long enough to actually get the job done?!).

M

[He Who Shall Not Be Named]

Got the new motor-bulkhead work done today. Tomorrow I fit the prototype SD to the kits hull and see if its ballast tank has the volume to get this model kit up to designed waterline.

[He Who Shall Not Be Named]

Got the new motor-bulkhead work done today. Tomorrow I fit the prototype SD to the kits hull and see if its ballast tank has the volume to get this model kit up to designed waterline.

[redboat219]

With the type vii you went with direct drive here you're using reduction gears. May i know why.

[He Who Shall Not Be Named]

The type-9 is a much smaller boat than the GATO. I found that a single GATO motor (380 size can-motor, rated at 12-volts), geared 3:1 to have enough umph to push the type-9 around at a reasonable speed. Keep in mind that the GATO, using two of these motors, each geared 3:1 is way overpowered.

I toyed with using the type-7 motors (250's rated at 6-volts), direct drive, which would have been a viable alternative than what I came up with as the type-7 is also way overpowered. I would say the 9 has about a third more wetted area than the 7, so that motor combination might have been a perfect match.



The design driver for the Type-9 motor-bulkhead was the simple fact that I have a ****-load of 380 motors sitting around here and I want to use 'em up. How's that for the 'scientific approach'?!....

[He Who Shall Not Be Named]

[crazygary]

Beautiful patternwork, M!!

Many years of "doing-what-ya-gotta-do" is so rewarding "down-the-road"!! Gets to where you
wonder if polyurethane is actually a part of your DNA!! Always challenging but the end always seems
to justify the means!!

Keep crankin' away, Brother! Your exploits are clearly understood and appreciated by this old guy!!

BTW, she's a big 'un!! Some 40 inches plus?? Mama MIA!! I'm gonna need a bigger pool!! Hah!!

CG

[He Who Shall Not Be Named]

The tight confines of the 1/72 Type-9 sail prevent inclusion of a standard, horizontal type induction snorkel head-valve. So, I was compelled to design a new type that would fit. Following that I made one 'proof' prototype to check for practical function, and when that worked out I made masters for six of the new snorkel head-valve bodies -- these later used to make a tool from which production parts would be fabricated.

The sausage-making continues ...

[Buellman1]

I'm going to get in line for possibly two fittings kits and drivers. Even though Tower Hobbies said mid January, I ordered two a week ago and they arrived tonight. The kit is very nice looking so far. Rivets... Lotsa of rivets. It looks highly detailed more so than the gato. Even if I don't get around to finishing the running part of it, it'll make a beautiful shelf queen.

[trout]

David,
i do not see the images. Is it just me?
t

[reddevil]

Neither do I.

[He Who Shall Not Be Named]

they come up for me.

M

[He Who Shall Not Be Named]

they come up for me.

M

[Kazzer]

they come up for me.

M

Not after I deleted your double post. See my email. Get a Mac