By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for SloopJohnB

Here is a list of all the postings SloopJohnB has made in our forums. Click on a thread name to jump to the thread.

Thread: Auxiliary Drive for Pride of Baltimore
25/06/2020 10:20:31

Thanks for your replies, the displacement is a factor of 10 out its should be 13.9 kg.surprise

25/06/2020 01:54:34

Oops, I forgot to add the voltage for the winches is 7.2 volts so it would preferable to use the same battery for the motors.

25/06/2020 01:13:24

Hello guys.

I have been a RC sailor for 20 years racing IOM's, DF65 & 95's but decided to do a scratch build classic boat, the Pride of Baltimore II.

I am in the process of building a 1:24 scale boat, the hull is completed and turned over now working on the inside of the boat. I have 2 sets of drawings for reference, copies of the original Thomas C Gillmer drawings and the 1:64 Shipway drawings.

Boats details:

 

1157 mm LWL

310 mm BeamWL

120 mm Hull Draft

155 mm Keel Draft

1.39 kg Displacement

1.6 knts scale speed

I have started to build a test rig to sort out the sail sheeting and hoisting, I will be using RMG sail winches, which I have recovered from an earlier build (2003) F100 canting keel 1 meter yacht, 3 x 380HD and 1 x 280D winches and 2 Hitec HS-715BB Sail arm servos......plenty of pulling power.

The next thing is the auxiliary drive, the original boat has twin feathering propellers, so I would like to duplicate that setup, after searching the web I came across the Microcosom viable pitch propellers, I believe that the blades rotate thru 90 degrees (+45 to -45) with some re-engineering I could make them feathering by reattaching the blades at 90 degrees, which will cover forward and reverse if the ESC is unidirectional.

The big questions are, I am not great of electronics having spend my life as a mechanical designer, its great seeing product, water steam coming out the end of a pipe, but you can’t see volts, amps and watts out the end of a piece of wire.

Motors, brushless or brushed motors

What size motors

Single or twin motors, if single a dual output gearbox

Gearbox/belt drives, I have calculated about 2000 rpm propeller shaft speed.

Counter and clockwise propeller rotation

Single or 2 ESC, it looks like a single ESC can drive 2 brushed motors.

Do ESC have forward and reverse, some car units do.

 

Reading some of the topics on forum they are some great minds, so I am looking forward to the recommendations, Thanks a lot.

 

Regards SloopJohnB

Edited By John Beavis on 25/06/2020 01:16:12

Magazine Locator

Want the latest issue of Model Boats? Use our magazine locator link to find your nearest stockist!

Find Model Boats!

Support Our Partners
Tony Green Steam
Nylet
Sarik
Shrek
Premier March
Restorers Wanted
Pendle Boilers
Shopping Partners
Social Media

'Like' us on Facebook

Follow us on Twitter

Pin us on Pinterest

Member Contributions
Distributors of Model Boats for our overseas readers
Highlights

Make sure you never miss out on the latest news, product reviews and competitions with our free RSS feed

Make your own contribution to the Website

We welcome well written contributions from Website members on almost any aspect of Model Boating with a particular emphasis on practical hints, tips, experience and builds.

In order to maintain a consistent standard and format, all suggestions should first be sent to me by Personal Message for approval in principle. Only a very limited amount of time is available for editing contributions into a suitable format for placing on the website so it is important that the material is well presented, lucid and free from obvious spelling errors. I think it goes without saying that contributions should be illustrated by appropriate photos. I shall be happy to give advice on this.

The Member Contribution area offers space for short informative mini articles which would not normally find a place in Model Boats magazine. It is an opportunity for Website Members to freely share their  expertise and experience but I am afraid that virtue is its own reward as there is no budget to offer more material recompense!

I look forward to receiving your suggestions.

Colin Bishop - Website Editor