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Post by steamboatbob on Jan 22, 2009 14:10:05 GMT 1
Hi Guys As a novice builder i was wondering if there is anywhere out in cyberspace that A frames can be purchased as i have tried to build some and i now realize my soldering skill is less than required i have three Raboesch 301-01 prop shafts for the job ( i went for these as they are watertight and have bearings. at 290mm long and 6mm in diameter any help would be greatly appreciated Cheers
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Post by popeye on Jan 23, 2009 13:32:28 GMT 1
If you go to my picture site (or look in "Popeye's Build") and look at the set named "Bismarck as at May 2008" you will see how I did my A-Frames. The pictures on the site also have a detailed explanation of the construction and fitting details. Essentially, the frames are made from flattened 6mm dia stainless steel tubing (but you can, of course, use brass or copper tubing). www.flickr.com/photos/commander-popeye/The following page, from Cornwall Model Boats shows some useful propshaft fittings, including a "P" frame, which is a single leg frame that needs gluing to the hull. www.cornwallmodelboats.co.uk/acatalog/prop_shaft_accessories.htmThese are some pictures of my A-Frames and how they are fitted, taken from my picture site. Incidentally, I have ordered the Cornwall 4mm thrust bearings and will be fitting them on the 2 driving shafts (my middle shaft is just a dummy and is not powered) in place of the washer (I will probably have to file down the securing nut to make room for the 3mm thick bearing). I will also be fitting an oiler block to each shaft, inside the boat, to keep the shaft topped up. You can also see on the picture that I drilled and tapped a hole in the body of each (Raebosch) propellor to take a stainless steel M4 grub screw and filed a small flat on the propshaft thread so that the prop is fully secured onto the shaft and will not twist off (the M4 screw also tightens up against the prop with a non-slip/"graunch" washer to provide belt and braces securing of the prop)
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Post by swanrail on Jan 23, 2009 23:28:05 GMT 1
Have a look in my thread "UPDATE 10TH APRIL 2008" in my Swanrails Modifications and Tips, and you will see in the 4th picture down my A frames, which were made from wood. The struts are made from scrap 5mm by 1mm, and the tube part from 8mm dowel, carved and sanded to shape (taken from the book The Anatomy of the Bismarck). This latter part could be turned in a slow moving drill chuck if you are good at that sort of thing. Picture in question repeated below:
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