Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Steam => Topic started by: dlyyld on September 23, 2014, 02:06:25 am

Title: variable pitch propeller from Microcosm
Post by: dlyyld on September 23, 2014, 02:06:25 am

From the beginning of this year, four out of the design, after six months of production, is expected to start selling in October, the price between 100-150 dollars.
It is machined from copper and stainless steel materials made ​​with four sealed bearings. Blades by laser welding. Blade structure is quite complex. Input shaft of the steering lever controls have modified pitch.
Jin


(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/01.jpg)
(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/02.jpg)
(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/03.jpg)
(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/04.jpg)
(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/05.jpg)

Title: Re: variable pitch propeller from Microcosm
Post by: dlyyld on September 23, 2014, 02:07:29 am

(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/06.jpg)
(http://i1054.photobucket.com/albums/s492/galglg/steam/Verstellpropeller/07.jpg)

Title: Re: variable pitch propeller from Microcosm
Post by: BarryM on September 23, 2014, 09:00:40 am

Lovely job! What sizes will be produced?
Regards,
Barry M

Title: Re: variable pitch propeller from Microcosm
Post by: david48 on September 23, 2014, 10:08:13 am

Looks good ,what stops the blades from turning on there axis ,when going fron forward to astern what will happen to the blades will thy turn and make astern abit more effective . Thy look really good .
David

Title: Re: variable pitch propeller from Microcosm
Post by: Netleyned on September 23, 2014, 11:13:19 am

The motor will run one direction
Ahead and astern will be controlled by propellor pitch
At least it did on two RN Hydrographic Vessels with Stone KaMeWa
controllable pitch props.


Ned

Title: Re: variable pitch propeller from Microcosm
Post by: derekwarner on September 23, 2014, 12:06:32 pm

mmmm ..........I have previously worked on VPP hydraulic control systems by "Lipps" from the Netherlands as installed on the Australian built Iron Duke & Iron Monarch .....
I understand "Lipps" have since been acquired by Wartsilla

The hydraulic control system was extremely reliable & only required mechanical intervention each 2 yearly period for survey by Lloyds ....however blade geometry from memory was semi symmetric and totally different to the unit displayed here by Jin.................. Derek

"IRON MONARCH (111)
1973- 10,584 gross tons, 4,321 net, 14,940 dwt. Lbd: 588'4" x 82'2" x 29'1" (179.3 x 25.1 metres) IMO 7305502 General cargo, Ro/Ro steel products carrier built by Whyalla Shipbuilding & Engineering Works, South Australia for BHP. Machinery: MS 5,000 heavy duty marine gas turbine engine (General Electric Co, Schenectady, USA"

Title: Re: variable pitch propeller from Microcosm
Post by: david48 on September 23, 2014, 01:54:21 pm

The Max Prop fitted to the yacht I sail on has a vernier  scale to manually adjust the pitch has gears inside !forward pitch one way !astern pitch other way ,sailing blades feathered to reduce drag . All done by the shaft rotation .
I do not know how to post a link on the iPad  . The prop is a Max Prop VP 3 blade .
The gearing and the vernier set the pitch. The reason for my observation was I could not see how the blades would set at the required place .
Having said all that it looks a bit good .
David