PS Industry

[dragoncity]

No Derek, you did not miss a posting, I ( Brett) had not make
one until I figured out how to set up a photo album and upload
a few photos. I had some problems with time outs, I hate saying I'm
going to do something , rather say I've done something! :-), so I
had a
quiet play with the photos first.

You are correct in that I'm using two car windscreen motors ( Ford XD
Station Wagon REAR wiper motors. They are some what smaller than
the front motor, however the front ones have two speeds built in.
( very expensive from your local wreckers at around $5 ! )
I've test run them, paddles fitted, with the boat tethered,
for a continious run of one
hour without any overheating or strange sounds emitting.

My boat is based upon P.S Industry in as much as I've scaled the plan
published in "Redgum & Paddlewheels (Australias Inland River Trade)
by Peter Philips , ISBN 909104 26 3 (pub 1980 reprint 1981)
This plan, on page 40, is the original 1910 Naval Architects plan,
redrawn 1978,
and shows quite good detail, showing Side, Top and Section views.


( thanks for your offer , but I think I have sufficient detail for
my limited needs )

I scanned the plan into Design CAD 2000 and worked from there to
get
enough detail to build the hull you see in the photos.I have not
tried
to convert the whole plan into CAD form as I dont need that detail,
might be an intersting winters job however.

As you can see from the photos I am not trying to create a scale
version of Industry but happy to base my 'Industry' upon the original
plan to get correct dimensioning mainly.

I come from a racing yacht background ( M's, A's and 10 raters ) ,
so scale detail in not my forte ( or interest ) !

Rough dimensions :

Length : 1270mm ( 50 in) [same as M class]
Beam : 210mm ( 8 in)
Deck Line : Stem : 100mm, Mid 80mm, Stern 90mm
Motors : 2 x Forn XD wiper motors ( 12 volt), approx 50 RPM
Battery : 1 x panasonic or century sealed lead acid, 12 volt 7
Amph
Paddles : 155mm diameter stainless steel rims, 10 blades ( 20 x
68mm ) stainless steel

pop riveted.
Drive , direct from standard gearbox drive shaft using 1/2" SS
tube.

Two Channel Sanwa Radio, ch 1 rudder , ch 2 'speed control' via
micro switchs giving Stop, Forward, Reverse.

Should be in the water in the next few weeks.

Thanks for your interest.

Brett

[Derek Warner]

One of the beaut things with PD via a yahoo group site is the search function in the
"messages" section

Scale shaft speed is a special subject and we can all woffle on about taking the square
root of the scale & multiplying it by the actual & then saying but what about the density
of water which we cannot scale - so all I think we can say is that 50 RPM
model speed will just get you going against the river current (most suggest say 200 RPM)
& control it down

I joined the group approx 15 months ago & have found great support from experienced
Paddle ship modellers from around the world - just go for it - regards Derek

[dragoncity]

Derek , you forgot to mention the phases of the Moon in calculating
scale effect !!

I'll take you info re 200 RPM on board, as I had already started the
project before hearing about paddleducks , I was working from all
sorts of
possible info.

I did a test run today ( before you message) and had already
concluded that 50 RPM was not enough speed. Motors run very nicely
however.