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Dry Dock / Shipyard: Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: radiojoe on April 18, 2016, 03:29:56 PM

Title: Diva scratch build
Post by: radiojoe on April 18, 2016, 03:29:56 PM
Hi all, Hope you all don't mind me posting another build log, I do like to look back on my builds and posting them on Mayhem is a good way to keep me focused on keeping a log up to date.

So this log is going to be my version of a semi scale 1960's Diva, she's 580mm long and 180mm beam, powered by a brushed 400 motor, mainly because I had a spare etronix probe brushed ESC, plus I'm only looking for scale speed, and I'll see how she performs with a two bladed prop to start with.
I've spent the last two days drawing up the plans, as I said in another thread it's been over 40 years since I scratch built a hard chine hull so I'm really drawing on the old memory here, I'm planning on making the whole cabin/wheelhouse/cockpit removable as one unit giving full access to the running gear etc. the finish will be white hull with blue boot topping/ blue cabin/wheelhouse with white roofs instead of the more traditional varnished mahogany.
I was off to the local model shop tomorrow to get all the ply/strip wood for it but just thought I would do a price comparison between the local shop/ slec,uk and CMB for the list I had the local shop was 27.49 for the same list Slec uk was 12.29 with CMB somewhere in the middle, even with the postage Slec uk  was 9 cheaper,  Ok model shops have overheads but presumably Slec must also have overheads just like model shops they have to keep their stock somewhere, so sorry it's a no brainer for me and I don't have to get the car out and find somewhere to park.
Title: Re: Diva scratch build
Post by: Martin [Admin] on April 18, 2016, 04:18:57 PM
 
We love build logs....BuLogs?!?   %%
Title: Re: Diva scratch build
Post by: Starspider on April 18, 2016, 05:11:40 PM
Nice drawings Joe  :-))  I will tag along as well if that is ok.Do enjoy build logs.
Think I maybe turning into a digital builder lol
colin
Title: Re: Diva scratch build
Post by: nivapilot on April 18, 2016, 05:18:42 PM
I shall be keeping up with this one as well.
I have some plans somewhere for a very similar hull, and will look upon a build with great interest ... if I may.
Title: Re: Diva scratch build
Post by: ballastanksian on April 18, 2016, 05:55:05 PM
Can I join? I'll bring cake:O)
Title: Re: Diva scratch build
Post by: Captain fizz on April 18, 2016, 05:59:48 PM
Pulling up a chair ;)
Title: Re: Diva scratch build
Post by: radiojoe on April 18, 2016, 06:16:48 PM
Thanks guys nice to know you're there  %%

Wouldn't you know it I've had a senior moment with spelling the title, only just noticed it, maybe a kind admin will correct it for me  %)

I've used all the right letters but not necessarily in the right order, to quote one of our greats.  %% {-)
Title: Re: Diva scratch build
Post by: Starspider on April 18, 2016, 08:28:47 PM
love cake I'll put kettle on.

Title: Re: Diva scratch build
Post by: Capt Podge on April 18, 2016, 11:36:58 PM
Like the way you keep your logs concise and to the point, so I'm joining in too. :-))

Regards,

Ray.
Title: Re: Diva scratch build
Post by: Unsinkable 2 on April 19, 2016, 06:34:21 AM
I saw the title (I didn't notice the mistake until you mentioned it) my brain ignored my eyes and just put it right inside my head....... Which is probably what happens when I look at my finished boats and no one has the heart to tell me {-)


I was surprised when I saw it was you Joe, but in a good way. I'm pulling up my chair next to the others and reaching for a piece of Ballasts cake and waiting for a brew from Starspider ........ anybody want a biscuit ?...... U2
Title: Diva Scratch Build by radiojoe
Post by: derekwarner on April 19, 2016, 07:17:01 AM
Guys.......you could have fixed it your self  O0 .... considering radiojoe's threads usually get many hundreds of member views......the WONKY  %% spelling will be on page 1 only................ Derek


I wish it was Derek, had to change all the subjects.

Bob
Title: Re: Diva scratch build
Post by: ballastanksian on April 19, 2016, 09:12:22 PM
 :-))
Title: Re: Diva scratch build
Post by: radiojoe on April 19, 2016, 10:33:32 PM
 {-) {-) {-) Brilliant   :-))
Title: Re: Diva scratch build
Post by: Starspider on April 20, 2016, 09:00:36 AM
Wonderful Ian  :-)) :-)) :-)


When we starting teas getting cold
Title: Re: Diva scratch build
Post by: radiojoe on April 20, 2016, 10:00:58 AM
while waiting for the wood to arrive I've been pottering about fine tuning the drawings, tracing the frames, cut out the keel and marked out a building board, To my surprise the wood came ten minute's ago, excellent service from Slec, considering it was only ordered Monday 4 o clock and was delivered well packed at 9.30 today (Wednesday) cheap and good quality, Slec for me from now on.

so now to get all the frames marked and cut out, I won't bore you all with this in detail I'll post again when I get to the hull assembly stage, otherwise Starspider's tea will get cold
Title: Re: Diva scratch build
Post by: radiojoe on April 21, 2016, 05:11:31 PM
Thanks for correcting the my mistake Bob. :-))    I didn't notice it till after the modify period.
Title: Re: Diva scratch build
Post by: ballastanksian on April 21, 2016, 08:41:46 PM
Did you fine tune your drawings to suit the way you are building Diva, or were they a bit wonky?

Title: Re: Diva scratch build
Post by: radiojoe on April 21, 2016, 08:53:03 PM
Hi Ian,   by fine tuning I meant going over them and double checking for mistakes that could effect how everything lines up when assembled, checking the notches in the frames are the correct size etc. The tracings are now all transferred to the ply using graphite paper, so now to cut them all out.  :-))
Title: Re: Diva scratch build
Post by: radiojoe on April 23, 2016, 06:11:04 PM
got all the frames cut out and started the assembly, so far so good attention to detail like making sure all the notches were the right size etc seems to be paying off and she's going together quite well,  when I ordered the timber for this project I got 1.5mm ply for the deck and cabin but like a numpty I forgot to get the hull ply, I attempted to bend the 1.5mm round the bow section but felt it had too much tension on it so now I ordered some  .8 birch for sheathing the hull.
Title: Re: Diva scratch build
Post by: Captain fizz on April 23, 2016, 06:13:47 PM
Looking tidy Joe :-))
Title: Re: Diva scratch build
Post by: radiojoe on April 23, 2016, 06:34:16 PM
Thanks Simon, I haven't built a hull in over forty years, so far this one is better I guess I must have learnt something over the years. %%
Title: Re: Diva scratch build
Post by: ballastanksian on April 23, 2016, 07:38:11 PM
Don't forget your Springer from 2015 O0

Are the frames just glued to the build board, or is just resting there?
Title: Re: Diva scratch build
Post by: radiojoe on April 23, 2016, 08:28:00 PM
 Ian, I don't really count the Springer as a hull build more like a box build  %%  {-)   
The frames are tacked to the building board with a spot of Cyanoacrylate under the lofting lugs, once the keel and stringers are glued in and most of the sanding is done the assembly will be released by tapping each lug with a small chisel.
Title: Re: Diva scratch build
Post by: radiojoe on April 24, 2016, 05:25:52 PM
Forgetting the ply for the hull turned out quite an advantage fitting the motor was so much easier with the hull open, as I had a spare brushless motor I decided to fit that instead of the 400 brushed motor, so the motor and shaft are now fitted and removed till I clad the hull and coat the inside with sealer, next I make up the rudder to my usual laminated pattern.
Title: Re: Diva scratch build
Post by: tica on April 24, 2016, 07:56:06 PM
Hi there

Looking good  :-))

Is the shaft tube in plastic ? if yes please be very careful when plating the hull as even minor tensions can have an negative influence on the tube and it may jam the shaft , been there with my first try on GG's Miami had to scrap the hull  >>:-(
Title: Re: Diva scratch build
Post by: radiojoe on April 24, 2016, 09:24:52 PM
Yes the tube is plastic, I did have reservations about using it but it should be ok with care, the shaft only bears each end in a brass bearing and has ample clearance in the tube, it will also be enclosed in a skeg and I'll leave the shaft in place as it's build in.
Title: Re: Diva scratch build
Post by: Starspider on April 24, 2016, 11:04:18 PM
Looking very good. Like the idea of sorting the motor mount before you sheet the hull  :-))
Title: Re: Diva scratch build
Post by: radiojoe on April 25, 2016, 02:28:29 PM
Yes fitting the motor was easier, but it was more by luck than judgment.

made the rudder today quick and simple laminated styrene, roughly cleaned up, I'll leave overnight to harden and then I'll sand to a profile,  I like this type better than the brass plate ones.
Title: Re: Diva scratch build
Post by: Starspider on April 25, 2016, 04:53:56 PM
It is a nice way to do the rudders you can get a good profile and you can get some lift into it :-))
Title: Re: Diva scratch build
Post by: ballastanksian on April 25, 2016, 10:00:11 PM
Another useful tip for future projects. It's looking good Joe :-))
Title: Re: Diva scratch build
Post by: Capt Podge on April 25, 2016, 11:16:36 PM
...like others on here, I'm learning from your postings.

Progressing well  :-)

Regards,

Ray.
Title: Re: Diva scratch build
Post by: radiojoe on April 29, 2016, 03:47:39 PM
Got the hull clad and started fitting the skeg, and thought I'd better make a stand to make it easier to work on, also got the deck roughly cut out I'll fit the rudder assembly next white it's still easy to get to inside.
Title: Re: Diva scratch build
Post by: Captain fizz on April 29, 2016, 03:53:41 PM
Looking very neat and tidy Joe :-))


Simon
Title: Re: Diva scratch build
Post by: ballastanksian on April 29, 2016, 09:19:47 PM
And a rapid build as well.
Title: Re: Diva scratch build
Post by: radiojoe on May 01, 2016, 05:19:41 PM
Got a fair bit done this weekend, fitted the rudder and servo, deck, spray rails, combing etc. so that's the hull ready for priming, next is the cabin/cockpit assembly, the hull only weighs 375 grams so I'm hoping it will float about right with the 4000mAH lipo I'll test that as soon as I get a few coats of primer on.
Title: Re: Diva scratch build
Post by: Captain fizz on May 01, 2016, 06:01:12 PM
All looking very neat and tidy Joe.


Simon.
Title: Re: Diva scratch build
Post by: nivapilot on May 01, 2016, 06:05:00 PM
Very nice.
Title: Re: Diva scratch build
Post by: ballastanksian on May 01, 2016, 07:11:11 PM
By criminy Joe, have you been given a weekend pass to increase your modelling time? Super progress.
Title: Re: Diva scratch build
Post by: canabus on May 02, 2016, 10:57:17 AM
Hi Joe
I little tip add a short piece of silicone fuel tube between the rubber tube and the operating arm of the rudder on the shaft for safety.
If the operating arm comes off you do not lose the rudder!!!
 
Title: Re: Diva scratch build
Post by: radiojoe on May 02, 2016, 11:23:35 AM
Thanks, that sounds a very reasonable thing to do, it's all been removed while I completed the hull, when I put it back in I'll do just that. :-))
Title: Re: Diva scratch build
Post by: radiojoe on May 02, 2016, 04:30:35 PM
Made a good start on the cabin/cockpit today, I had already cut out the sides and bulkhead a while ago when waiting for the hull ply, and so far my plan to make the whole assembly removeable seems to be working out fine, I put masking tape around the combing while doing the structure it stops the glue sticking to the deck, and provides a clearance for paint,, I fitted a capping over the combing in the cockpit area and the cockpit sides etc. is suspended from that, I believe in the Aeronaut Diva the cockpit stays in place, it dose seem to be coming together quite fast, it's one of those builds where you add a few strips of wood and a couple of bits of ply and it looks like a lots been done, but I'm quite pleased with her so far.
Title: Re: Diva scratch build
Post by: Starspider on May 02, 2016, 05:50:17 PM
Looking really good, like the door framing very cool.
Colin
Title: Re: Diva scratch build
Post by: ballastanksian on May 02, 2016, 07:47:06 PM
You should be pleased Joe, though if you work any faster, you might scorch the wood with the friction of your rapid movements %% Keep a damp cloth near at hand just in case! Looking lovely and I agree with Colin about the door frame, nice touch.
Title: Re: Diva scratch build
Post by: radiojoe on May 04, 2016, 02:35:19 PM
Thanks for you comments,
Fitted the hold down magnets, with hind sight I should have done this job before fitting the cabin roof but they work well, the 4000 lipo fits snugly under the cockpit floor, then finished the cockpit and fitted the upper cabin roof and some grab rails so now for a paint job.
Title: Re: Diva scratch build
Post by: Capt Podge on May 04, 2016, 07:06:52 PM
That is really fast work Joe, and good timing with the weather for spraying.

Just noticed on your latest posting - the way you have incorporated, into the stand, ready made hand access by way of the arched bottom on the cradles - it's another one of those "now, why didn't I think of that" ideas - great work Joe. :-))

Regards,

Ray.
Title: Re: Diva scratch build
Post by: radiojoe on May 05, 2016, 10:32:55 AM
I made a steering wheel for her, as said in previous threads soldering is defo not my strong point but it's passable if you don't look too close, just got to get some paint now and do a paint job, then replace all the running gear etc. then I'll have a go at making the aft bench seat and the captains chair, a first for me so that should be a bit of fun.
Title: Re: Diva scratch build
Post by: Starspider on May 05, 2016, 12:42:52 PM
Soldering looks good to me mate  :-))
build is another masterclass  :police: :police:
Title: Re: Diva scratch build
Post by: Captain fizz on May 05, 2016, 06:28:21 PM
Looks pretty good to me too :-))
Title: Re: Diva scratch build
Post by: nivapilot on May 05, 2016, 07:12:02 PM
Can't fault the soldering...or any of the build, come to that.......cracking little boat... :-))
Title: Re: Diva scratch build
Post by: ballastanksian on May 05, 2016, 11:18:44 PM
Amen to those sentiments.
Title: Re: Diva scratch build
Post by: radiojoe on May 07, 2016, 04:56:48 PM
Very kind, guys, but I know I tend to use too much solder, anyway I've now done a basic paint job and replaced all the running gear and did the first float test, that was very satisfactory with no leaks, and even with the 4000mah. lipo still needed 160 grams of ballast, I had feared she would sit too low, in which case I would have had to have used a smaller battery, so have to say I 'm very happy with her, and just need to add finishing touches, I intend to keep her basically white with some blue trimming paint.
Title: Re: Diva scratch build
Post by: Captain fizz on May 07, 2016, 05:07:34 PM
Very nice indeed Joe.


Simon
Title: Re: Diva scratch build
Post by: Starspider on May 07, 2016, 11:46:24 PM
Nice paint finish Joe  :-))
Title: Re: Diva scratch build
Post by: radiojoe on May 08, 2016, 07:34:03 AM
Thanks guys, I'm quite pleased with the finish considering it's plywood, it did have three coats of primer rubbed down with 800g paper, and five top coats, one and a half 500m cans. %%
Title: Re: Diva scratch build
Post by: Tug-Kenny on May 08, 2016, 10:03:20 AM

That's what I call a  'finish'

Well done Joe.  Excellent work

ken
Title: Re: Diva scratch build
Post by: ballastanksian on May 08, 2016, 05:55:37 PM
Amen. I envy you chaps and the finish you get. I suppose it is mainly elbow grease that does it.

Title: Re: Diva scratch build
Post by: radiojoe on May 08, 2016, 06:35:08 PM
It's also running round the garage after you've just finished spraying it chasing all the "xxxxxxxx" black fly out. %%  {-)
Title: Re: Diva scratch build
Post by: radiojoe on May 09, 2016, 04:05:41 PM
Made up a master cleat so I can cast a few, I'm not going to fit too many fittings on her, just the cleats and a bow roller, and maybe some nav lights later, she's more of a fun boat than a display model.
Title: Re: Diva scratch build
Post by: ballastanksian on May 09, 2016, 07:53:21 PM
Hm, it sounds like your painting sessions could become very 'Slap stick' where flies and the like are involved. Just don't swat the fly and then accidently backswat your model leaving a waffle impression in the hull {:-{
Title: Re: Diva scratch build
Post by: radiojoe on May 10, 2016, 03:50:28 PM
I had thought of making the seats with a foam covered in cloth of some sort but this would no doubt frequently get wet so I simulated them with styrene, I'll have the "upholstery" blue to match the spray rail etc. the boats will have to go on hold for a couple of days, my hot water cylinder sprung a weeping leak, and the new one came today. it's years since I did any plumbing, I've had to clean and oil my steelsons and pipe cutter etc.
Title: Re: Diva scratch build
Post by: ballastanksian on May 10, 2016, 07:31:52 PM
Remember not to use solder paste on this job!
Title: Re: Diva scratch build
Post by: canabus on May 11, 2016, 08:14:00 AM
Another plum job!!!
I finished install a gas hot water unit with two gas bottles and re plumbed the hot and cold pipes, added a shower base and vanity unit!!!
Also re plumbed the drain pipes.
WHAT ARE DAD'S 4!!!!!!!
Title: Re: Diva scratch build
Post by: radiojoe on May 11, 2016, 03:59:01 PM
Well that's the hot water cylinder done, ;) second time I've renewed this cylinder, first time was about 30 years ago, the cylinder was 80 then, this one was 287, I could have built another boat for that, well nearly. %% %% {-)
Title: Re: Diva scratch build
Post by: radiojoe on May 14, 2016, 02:37:52 PM
Well apart from maybe fitting some lights, that's Diva finished, a quick but very enjoyable build, apart from the running gear the only item I didn't make was the lifebuoy that I had in the rummage box, so she'll be going for trials next week it will be interesting to see how she performs, I built in enough room for the next size up prop if necessary, but judging by a power up the domestic wet dock she just want's to go, so it looks promising.
Title: Re: Diva scratch build
Post by: Leaky Bottom on May 14, 2016, 04:59:50 PM
A very nice little sports boat  :-))


Just one little point thou, the bow roller looks far to big and out of proportion for the size of boat
Title: Re: Diva scratch build
Post by: radiojoe on May 14, 2016, 05:18:13 PM
Yes I think your probably right, it's been bugging me a bit, it's only screwed on I think I'll make a smaller one.
Title: Re: Diva scratch build
Post by: Unsinkable 2 on May 14, 2016, 08:03:48 PM
What a belting boat Joe :-)) . And what a fantastically quick build. Superb, well done!   U2
Title: Re: Diva scratch build
Post by: ballastanksian on May 14, 2016, 08:35:42 PM
She looks excellent and again your detailing really adds that extra pzazz to an already brill model.

The benefit I can see from having a larger roler is that it will be quite strong against the time it bonks off the lake edge a bit too fast >:-o
Title: Re: Diva scratch build
Post by: Capt Podge on May 15, 2016, 12:14:02 AM
Another good job well executed - and that detailing on the console adds a nice little touch, nice one Joe. :-))

Regards,

Ray.
Title: Re: Diva scratch build
Post by: radiojoe on May 16, 2016, 10:49:47 AM
Thanks guys, I wasn't happy with the bow roller as Leaky Bottom quite rightly pointed out it looked way too big, so I made another about half the size, and although the whole boat is only an approximate scale I'm quite happy with this bow roller.
Title: Re: Diva scratch build
Post by: ballastanksian on May 16, 2016, 07:51:16 PM
Lovely Joe. Nearly done.
Title: Re: Diva scratch build
Post by: Tug-Kenny on May 17, 2016, 10:39:37 AM

Beautifully done Sir.  A pleasure to read your blog.

Cheers

ken
Title: Re: Diva scratch build
Post by: radiojoe on May 20, 2016, 05:31:49 PM
Thanks for your comments,    Had her first trials today, when you build a boat from a kit especially a fast boat you can be fairly sure of a known performance, as Diva was scratch built I had no idea how she would perform, of course I knew she would float, go ahead and astern, so it came as a pleasing surprise when she came up on the plane and performed better than I had hoped, even in a fairly strong breeze and quite choppy with spray going over her deck inside remained dry, I took two 4000mah lipo's with me but only used one in a one and a half hour session so quite happy with the run time, although she's fast enough for me I may try the next size up prop as I have built in enough room for it, the motor and ESC get barely warm even at full throttle so for the cost of a plastic prop I give it a go, in the photo's she's at half throttle.
Title: Re: Diva scratch build
Post by: Captain fizz on May 20, 2016, 06:12:50 PM
Looking very good Joe, well done.


Simon
Title: Re: Diva scratch build
Post by: ballastanksian on May 20, 2016, 08:57:33 PM
Also, you know it is a fun model so you have a bit more leeway if it starts out a bit tender or just pain off balance, whereas your Brocklesby for example, having all that detail and expense, there is the worry about stability and water ingress to consider.

She looks a natural on the water :-))
Title: Re: Diva scratch build
Post by: Starspider on May 20, 2016, 11:17:45 PM
She looks a proper cruiser Joe very nicely done from pen to paint.
Her tumble home on the stern view suits her perfectly to my eyes, well done sir  :-))


Colin
Title: Re: Diva scratch build
Post by: canabus on May 21, 2016, 07:58:58 AM
A top job, you shown us nice build with a few lovely pics of the boat running.
What motor did you end up with and prop combination.
I see that ewe are planning a few prop experiments with plastic ones.
I have found the metal ones better in the same size and pitch.
Title: Re: Diva scratch build
Post by: radiojoe on May 21, 2016, 08:59:15 AM
She's got a 1100K outrunner that's seems well up to the job and a 35mm two blade plastic prop, I too prefer brass props and she will have one eventually but plastic ones are cheaper to experiment with. :-))
Title: Re: Diva scratch build
Post by: canabus on May 21, 2016, 10:30:16 AM
Totally agree with you prop idea's.
The motor must be a 28mm as the 35mm one's I have run 40mm props.

Can-a-bus
Title: Re: Diva scratch build
Post by: radiojoe on May 21, 2016, 11:44:25 AM
I've just found a 30mm three blade brass prop in my spares box, I'll try it out at my local lake on Monday just as a comparison.
Title: Re: Diva scratch build
Post by: Martin [Admin] on May 21, 2016, 06:39:57 PM
 
Nice Stern!

(http://www.modelboatmayhem.co.uk/forum/index.php?action=dlattach;topic=54584.0;attach=161230;image)
Title: Re: Diva scratch build
Post by: radiojoe on May 24, 2016, 12:55:07 PM
Tested the 30mm three blade brass prop but performance was somewhat reduced, so I went to the local lake again today and bought a 40mm X type prop on the way, and now she has the performance I was looking for, very respectable speed but in keeping with the scale, very happy with her now great fun, I can see her sailing often. Again thanks for your interest and kind remarks.  :-))
Title: Re: Diva scratch build
Post by: ballastanksian on May 24, 2016, 07:27:10 PM
No worries Joe, your projects (like many on here) are interesting to read and study. It beats watching talent competitions thousands of timesover!

Title: Re: Diva scratch build
Post by: radiojoe on November 16, 2016, 02:30:32 PM

The last time Diva was sailed the performance was quite acceptable, but I got the feeling that the turns were a bit vague like the rudder couldn't handle the trust from the X type prop I concluded that I hadn't made the rudder large enough, so I set out yesterday to make a larger one, simple things to make so I thought this may help any new comers to the hobby so they can see you don't have to buy pricey commercial stock rudders when you can make them for a few pence.
The centre lamination is 1.5 mm. styrene and the outer ones are 1mm. styrene the shaft is 3mm. brass rod, and I've used a water proof epoxy,
Joe :-))
Title: Re: Diva scratch build
Post by: Capt Podge on November 16, 2016, 10:26:37 PM
Looking forward to the results of your latest tests Joe - hope you get the performance you're looking for. :-)

Regards,

Ray.
Title: Re: Diva scratch build
Post by: radiojoe on June 16, 2017, 05:50:22 PM

Just noticed it's been 7 months since I made the larger rudder and only just got round to trying it out yesterday, the turning was so sharp I had to adjust the end points on the Tx to 50 % because I tried a hard turn at full throttle and it turned so tight that she made a vortex inside the turn and nearly submarined into it, when I brought her back in she had a cockpit full of water but dry inside, so with the new Tx settings I can thrash her all over the lake and she just takes it well.


Joe
Title: Re: Diva scratch build
Post by: ballastanksian on June 16, 2017, 09:12:09 PM
Phew! That was a near miss.

Have lots of fun.
Title: Re: Diva scratch build
Post by: radiojoe on June 16, 2017, 11:33:56 PM

Sure was Ian, I've never seen a boat do that before it simply made a vortex on the sharp turn and almost fell into it, if I had left the power on I think it would have, the reduce rudder movement has cured it.


Joe