Forum

Wiring help needed.

Hi Colin. Ref Radar "what speed should it rotate at?" I lot would depend on the scale. On my HMS Cottesmore at 1/48 scale I have it rotating at approximately one complete revaluation every two seconds. If you look on my Cottesmore's log you will be able to see it rotating. That might give you an idea as to your decision. The top rotating is approximately two and a half inches if that helps. Martin555.

5 years ago by Martin555

Forum

What connector to use?

Have tried many of these ideas, but have settled on a different approach. Since standardizing on LI-PO cells and been concerned about the reports of self immolation and fire have decided to always transport the cells separate from the vessel. This means my deck and wiring should be readily removable to install and remove the cell. Using two wire brush type connectors off a slot car fed the +ve and negative wire through the deck connecting to the brushes. On the underside of the superstructure soldered mating wires onto brass washers. Whenever the deck is screwed down a good connection is established.This feeds battery voltage into the superstructure which contains all the control circuitry for lights, s etc. Even I cannot forget to disconnect the connecting wires now!

5 years ago by Rowen

Forum

Direction finder aerials /water pumps

Most likely using an LM317/337 etc or an LM 78xx IC I guess!?😉 PS I drove my radar on Hotspur at a gentle pace using an old linear servo modified to rotate continuously. Powered by a single 1.5V dry cell it trundles around quite sedately for yonks. No RC, just a simple ON/OFF switch. I take the battery out after every run😁 Cheers, Doug 😎

5 years ago by RNinMunich

Forum

NAAMA Tug Plan

Thanks John - found a paper copy in a magazine - but will pm you as its easy to stitch together on Corel. Our has been a bit iffy, having to try a few times to get a decent clear copy.

5 years ago by redpmg

Forum

NAAMA Tug Plan

hi ya there, been quiet because I had sent for the magazine not knowing if the plans were there - but - the plans are here and what I have done is scanned them on my A4 and there are a good few bits of the plan scanned. Send me your email in a personal message and I will try to email all to you. Not guaranteeing they will turn out okay - but hey I have printed a few off and they seem okay on A4 - You could print them all off and piece them all together to get your plan. john

5 years ago by JOHN

Directory

My Retirement Plans !!!

Hi Everybody, Having decided to finally officially retire, I have been inundated with an assortment of wrecks, part builds, kits etc. As you can see from the attached photos I've divided them into 3 Groups, Military Leisure Craft and Sailing. The Military group consists of a 1:128 Scharnhorst, 2 x 1:24 E.Boats, an unidentified V & W Hull, 1:36 Perkasa, and a 1:144 wooden hull of HMS Victory. The Leisure Craft group consists 1:8 Fairey Huntsman, a 1:36 Billings Sampson II, 1:35 Billings Calypso, 1:24 Clyde Puffer / Tug, Narrow Boat. And the Sailing Boats Group consists of 2 x Unidentified R/C Yachts. Finally there is a concrete Narrow Boat Planter to paint...definitely will not float, it weighs 15kgs!!! So having been forced to give up gainful employment😂 , (I was management so I could delegate), I now find myself back as general dogsbody, chief cook and bottle-washer. I'm setting up the Workshop, got a computer design area, a general workbench and a painting/ moulding table outside, the rest will be a 3D printer and when funds permit and the wife wont miss a few bob from the holiday fund. So no quiet life for me!!! Can I go back to work please????? Steve

5 years ago by boatiebennett

Forum

Radar with rotational drive

The EeZeBilt OSA Missile boat is 1:48 scale (see http://eezebilt.tk/OSA.html ). It uses a couple of geared motors for its two radar s. They were sourced from ebay to have approximately the right revs - faster if anything. See: https://www.ebay.co.uk/itm/3V-Model-Making-Multipurpose-Hand-Square-Micro-DC-Motor-Gear-Gear-DIY-Box/233174112136?hash=item364a429788:g:eC8AAOSwGDNckuvL and https://www.ebay.co.uk/itm/S7T7-DC-3V-30RPM-Torque-Geared-Gearbox-Gear-Box-Micro-Electric-Motor-Silver/302844117212?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20140122125356%26meid%3D0e921d41ff3b4ca6979bf779b4df3ff1%26pid%3D100005%26rk%3D6%26rkt%3D12%26sd%3D233174112136%26itm%3D302844117212&_trksid=p2047675.c100005.m1851 Each was then adjusted for speed using a voltage reducer. One is required to go at about twice the speed of the other: https://www.ebay.co.uk/itm/New-DC-DC-Adjustable-Step-Down-Buck-Voltage-Reducer-Stabilizer-Converter-Case/382762061618?hash=item591e658f32:g:1FwAAOSwLKhb9RNY This measured ideal voltage was then fed to each one by dropping the boat master voltage through a separate series of diodes for each motor. Both s can be separated for packing. The rear one slots direct onto the drive shaft. The front is driven by a thin piano wire which pushes into a silicone tube connected to the drive motor when it is assembled. Specifically, what do you want to know?

5 years ago by DodgyGeezer

Forum

Radar with rotational drive

Here is a bit more detail on the OSA 1 - All EeZeBilts live in their made-to-measure Correx box 2 - This OSA box carries the R/C Transmitter as well as the radar and aerials on a separate tray 3 - A closer shot of the radar. You can see the brass extension which slips into the silicone tube under the mast. The brass tube at the top is a 2-size box spanner for attaching the radar and the rudder, with spare nuts. 4 - Under the superstructure, you can see the two different motors (bought just to try them out) with two different mountings. The electronics in the centre is a made-up R/C switch using the Luton circuit for turning the s on. You can see a string of diodes inside the purple heatshrink. 5 - Here is the superstructure assembled. 6 - A shot from above 7 - And one of the Bridge. The sailors are Indian Navy, since this is a model of the INS NIPAT, but at the moment she is wearing a North Korean flag...

5 years ago by DodgyGeezer