Vosper rttl

[mark69Participant @mark69]

Hi all I thought I would add some pics of my build I started !! I got carried away I was only supposed to make that patterns whilst I'm making my yacht …mark

[mark69Participant @mark69]

[mark69Participant @mark69]

Hi all I've been busy with my vosper build ,I'm not to impressed with these plans though they seem to leave a lot to the builders interpretation ,if you look at the hull its supposed to be concave but with only the deck and chine stringers these no way of curving the plans ,so I'm going to have to cut the mid stringers in oh well back to balsa cabin in the week for me then !! …….mark

[mark69Participant @mark69]

Hi all I had the day to myself so in between the other build ive turn the hull over and started to add the stringers I did notice that the plans show concave sides but had seemed to of left the off the bulkhead drawings so with my countless cups of coffee I set about putting this right but as I only bought enough wood for what the plans showed I'm now back to the Balsa Cabin on my way home from work Monday …..mark

[Martin Field 1Participant @martinfield1]

Well! That sure ain't a Dragon, Mark, but it seems to be growing nicely. I'm busy getting some planks on my model Vanity, the Victorian Cutter I used to live on. Finally got the aft end frames sorted out.

Cheers,

Martin

[mark69Participant @mark69]

Hi Martin bit of a story with this ….I was only going to start this after the Dragon but ..while I'm varnishing I thought I would look at these plans but things being what they before I knew what I was doing I had a set of bulkheads all cut and it didn't stop there ! then what happened was I had found my building board ,only was going to just look but now as its to damp to carry on with me Dragon this has taken over ,I will never get my Spitfire done at this rate …….mark

[Martin Field 1Participant @martinfield1]

Spitfire? You mean a flyin' one? Or a hydroplane?

Can't afford airyplanes.

Martin

[mark69Participant @mark69]

Hi no it's a Mk1a 72" span scale job the fuz is epoxy with foam wings ,but I'm replacing the tail end which was to small and making built up wings with more scale detail .As for my dragon well that's been on hold for a time as the weather to humid for varnish so I have been building my vosper ,hull is now planked but not sanded or skinned and once I have a jig to support the hull it will be turned over to do the topsides ..The plans for this type were drawn years n years ago showing to motor choice (Taycol 5u/210 Meteors x2) if these at the time were good what in today's electric in /out runners what would I be looking at for mine ?? Any help be grateful……… mark

PS more pics soon

[Martin Field 1Participant @martinfield1]

As far as I can make out, for bigger boats, with a bit of weight to them, brushlesses are chosen with a lower KV rating for more torque, but you would need to check that with those who have done it.

I'm having enough trouble working out which motor to use in an outboard to drive my 152VO vintage outboard racer. I love them so much even I have had to go Brushless, LiPo, ESC and such, but I have a good teacher lined up. We both want to popularise 152VO in this country, Brexit or not! Check http://www.152vo.de/ folks for a breath of fresh air.

But do ask of those who have used bigger brushlesses. I have a pair of Taycol Meteors as it happens, but you ain't 'avin' 'em!<G>

Cheers,

Martin

[mark69Participant @mark69]

Martin you can keep them they are so not from this century ..how powerful are in real terms if you could gauge them with today's motors what would it be ?? .mark

[Martin Field 1Participant @martinfield1]

I love them, but no, they probably aren't that powerful, but they are torquey and spin a big prop. I can't stop the Bassett-Lowke shaft with my fingers on 9 volts or the bigger Taycols. They make a lot of noise, which I like a lot. Silent bores me, but who knows till they get in a boat. My Taycol Supermarine Special propelled my Crash Tender at a scale speed. The real ones were not great planers in their day.

Martin

[John W EParticipant @johnwe]

Hi there Mark69

I am sure you are aware that the plan from which you are building was originally published in The Model Maker in 1958 also in those days, not long after the War, model making materials were still pretty difficult to get hold of in any shape or form.; Normally you built with what you could get your hands on and Vic Smeed was brilliant in designing plans around 'what you can get your hands on' and this particular plan is one of them. There are several issues of this actual plan being a stand off scale plan with only very small errors in the actual plan. One of them is the chine line which isn't quite correct at the bow and also as you have already found out the flare on the hull sides and the bottom aren't quite correct on the plan.

The Model I built, which you may have seen on Model Mayhem was constructed with the help of many photographs from a guy called Christian Shepherd and this is where we corrected the slight errors. This is why I used about 5 stringers per side on the bottom and I think about 5 on the hull side. Then I double diagonally planked the hull – this allowed me to correctly follow the curvatures/flares of the hull sides and bottom. The reason I double diagonally planked it was to create a form of cold pressed ply wood which is a lot stronger and lighter than single skin.

The trick with building these hulls is build them strong but light. With modern materials you should be able to cut a lot of the frames out in the middle to decrease the weight of the model and therefore in doing this you don't need use powerful brushless motors. Just run on standard brushed motors.

John

 

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[John W EParticipant @johnwe]

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[mark69Participant @mark69]

Hi Bluebird I did find your build thread and I did find your pics helpful ,so far built mine as to the plans and as they only show a single skin I will use a 100 gsm fibreglass tisuue to strengthen the hull .What motors are those in your pic …mark

[John W EParticipant @johnwe]

Hi Mark

The props are 3 bladers 30 mm o/d both right handers and the motors are

2 / 600 vision MTronik – and 2 3300ma nicad batteries

John

[John W EParticipant @johnwe]

Hi Mark do you have the original article which goes with the Plan from the December 1958 magazine?

which actually tells you how to construct the hull "the hull is skinned with 1/16 ply and if you are using the scale cross sections, it is not possible to negotiate the compound curves with a single sheet. Cut the ply into fore and aft strip and plank in stages – then it tells you to paint the inside of the joints with glue after completion". That is just a slight extract from the build article.

John

[mark69Participant @mark69]

Hi Bluebird I wasn't aware of the build article that went with the plans I have ,it was 58years ago !! I have made the hull now and it's all planked .I've not used ply but instead balsa which I am going to skin with light weight woven cloth or GRP tissue not decided yet ……….mark

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