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>> Home > Boat Building Blogs > The Vosper 46” RAF Crash Tender Kit By Vintage Model Works
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mdlbt.com/37275
The Vosper 46” RAF Crash Tender Kit By Vintage Model Works Print Booklet
Author: mturpin013   Posts: 3   Photos: 10   Subscribers: 2   Views: 328   Responses: 5   |   Most recent posts shown first   (Show oldest first)

mdlbt.com/37334
The Vosper 46” RAF Crash Tender Kit By Vintage Model Works - Posted: 11th Jan 2018
Let the build begin, first job is to cut all the keel components out and trim any pips. I found the most accurate method of marking the position of the bulkheads on the central keel was to lay the cabin sides on the keel and transfer the positions of the already cut slots in the cabin sides onto the keel. The keel was then supported with four 90 degree angle brackets, Starting with the K1 pair they are clamped in position up against B1 then drilled through with 1.8 mm drill, and a 2 mm brass pin pushed home, this was repeated inserting each bulkhead along the whole keel ensuring the bulkheads would fit after the keel components were epoxied. The brass pins are then removed, each pair are epoxied and once again the pins pushed back right through this ensures accurate positioning. As I worked along each section the assembly was clamped. Note the two angle brackets holding the keel square at bulkhead B1

Attached Photos - Click To View Large


mdlbt.com/37323
The Vosper 46” RAF Crash Tender Kit By Vintage Model Works - Posted: 10th Jan 2018
Keel base
The first puzzle was the aspect of the keel base with the first bulkhead position for B1 and the fact that they are not square and actually at 88.9 degrees This made me question as to whether the keel should lay flat on the base or the bulkhead should be in the vertical plane when fitted. This could result in a small error of the vertical B1 or a 10mm error in the keel having to be raised by 10mm at the point where the prop-shaft emerges.
A quick call Michael Cummings at VMW confirmed this should be a 90 degrees not 89 degrees. Therefore the keel lays flat as I thought it should and there would be a small gap between B1 and its vertical face. Michael Cummings said he would look into this.

Attached Photos - Click To View Large


mdlbt.com/37276
The Vosper 46” RAF Crash Tender Kit By Vintage Model Works - Posted: 8th Jan 2018
Just a small introduction, I am a retired engineer, trained as a toolmaker and practiced this in various forms for 20 plus years before going into Lecturing in engineering for 13 years then finally working on development of NVQs and VRQs for an Engineering Awarding Body. As far as My model making experience I did a little as a youngster helping my dad to build the 36 inch Crash tender and then doing some model aircraft but that was 50 years ago. I then became hooked on building a kit car which has occupied me for many years changing things and maintaining it as a recreational vehicle. This brings me up to date and instead of restoring a classic car I decided to get back to model making and this is the start of the 46 Crash Tender.
So here we go
Out of the box and the contents checked off, a minor anomaly on the parts numbering but soon sorted by VMW.
I have spent some time in kitting out a new work station in what used to be my office until I retired. I now have two workshops one upstairs and one in the basement. How good is that?
One of the of the first things was to construct a substantial building board that would give a perfectly flat base and a grid that could ensure bulkheads are square to the keel an parallel with each other also the same aspects in the vertical axis. I lined out the base board with parallel lines spaced at 25 mm and then from the centre-line at 90 degrees I marked the bulkhead positions.

Attached Photos - Click To View Large

Response by mturpin013 on the 10th Jan 2018
Thanks for your support robbob. You have set the standard for this model and given me something to work towards, plus having read your blog front to back and back to front you have given some really valuable tips I've even printed your blog book (after some issues with Adobe and page orientation) Its now my reference book
Many thanks
Michael
Response by robbob on the 11th Jan 2018
Coming along nicely Michael 👍.

Tip.
When continuing with the build blog use the 'Post New Build Update' (yellow button) at the top of your blog when adding a new update rather than 'replying' to your own posting, which is what I think you are doing. You can then give the update a title /description of your progress.
The webmaster 'Fireboat' (aka Stephen) may be able to fix your postings before you post any more.

Meanwhile keep up the good work😁.
Rob.
Response by Lyle on the 17th Jan 2018
Dear Modellers and builders of the Vintage Model Works kit series. You will find my earlier pictures and various writings on the original earlier postings by me in OZ of my still some 30/plus years Crash Boat in which I wore out several I/C motors and my girl still runs in Salt Water at the local LAKE ILLAWARRA in New South Wales and you are somewhat fortunate with ready made fittings. I did not ever know of the "page" ( wish I had a copy ) on your wall of the rear well of fire hose details and fittings , wow what a bonus, as a colonial had several years till Peter Dimberline and I had contact and he helped me to authenticate my vessel. The ESSENTIAL secret of the Crash Boat is the spray rails. So many look toy in the videos and TOOOOOOO fast . The spray rails are doubled at width protruding from the hull and lesser at the point of "rise of the wood " towards the upper bow point. The depth is not too critical at a bit of about an eighth of an inch thickness or a bit thinner for the whole length as you do not want to see a "thick log ", rather again it is the width rather than depth. I know I have written on this before on this webb site in the past. The turns thus on the go become when starting on and STAY more on the go are more flatter rather like a full sized hull which has a planing/ flatter hull turn to the flatness of the water than a typical poorly behaving model boat hull which invariably heels TOOOO much and somewhat digging in , (in turns). The HARD CHINE hull design was meant to not only rise to a comfortable plane attitude but ALSO to turn without that annoying behaviour of "digging in" when it should still perform and exhibit that hard chine design attitude when in a turn . "Digging in" equals water resistance AGAINST the hull and loss of performance and loss of plane attitude and against wave resistance when the hull designers team is trying to maintain hard chine performance in the forward turning direction. I harp on this point that this hull design is one to respect . The older I get the more I expect of all my model machines that I am lucky to see on computers, as we certainly have more need to respect the masters, the likes of Peter Du Cane and T E Lawrence and Hubert Scott Payne of Vospers and Thornycroft and The British Power Boat Company and ELCO and Higgins, all of whom I have researched so much over my life and I have been to the memorial of Lawrence in the desert in Wadi Rum. I try to do it right. Regards to all builders Lyle. My mates and I have to run in 2 to 3 inch chop at times, such is the Lake Channel ! My wife has reminded me that some of my fleet do seem to have BLACK hulls and I only would build one model boat, when I bought the Aerobats Crash Boat home, the pictures are of some of my scratch built fleet.