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Author Topic: Midwest Boothbay Lobster boat 30" build  (Read 29682 times)

Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #100 on: May 23, 2019, 06:53:07 PM »

Thanks Stan
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ANDY
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Re: Midwest Boothbay Lobster boat 30" build
« Reply #101 on: May 23, 2019, 07:02:23 PM »


I've just bought a Turnigy 2836/11 750kv for my Aeronaut springer. I'll be using it with a parallel pair of 5000mAH 2s LiPos, running a 40mm 3 blade Raboesch brass prop. Should be good for about 200watts.



Too much grunt on a Springer turns
it into a diving boat.
Take it easy on the throttle stick.
Ned
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clockworks

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #102 on: May 23, 2019, 07:25:14 PM »




Too much grunt on a Springer turns
it into a diving boat.
Take it easy on the throttle stick.
Ned


Yes, I'll be fitting the batteries as far back as I can to try and help keep the bow up.  I might have to use "dual rates" on the throttle to avoid mishaps.
If it proves to be too much, I'll fit something a bit smaller, and save the Turnigy for my lobster boat build.
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Stan

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #103 on: May 23, 2019, 08:06:08 PM »

Just checked the prop on my model. Prop shop prop 30mm.




Stan
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DaveM

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #104 on: May 23, 2019, 10:47:08 PM »

Stan
What motor and what voltage are you running?
DaveM
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Stan

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #105 on: May 23, 2019, 10:58:40 PM »

Hi DaveM 7.2 Nimh motor was a  very old johnson 540 size. Now replaced with a M F A  540 not sure of full spec.I will see how if performs after refit.




Stan
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chum444

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #106 on: May 24, 2019, 02:24:25 AM »

Bear in mind these boats ran between 12 & 18 kits. Of course if you have lb races there go for it!

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DaveM

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #107 on: May 24, 2019, 08:26:02 AM »

Thanks, Stan MFA motor specifications are here https://mfacomodrills.com/motors/motors.htmlThe 540 LN is much the slower of the two.
DaveM
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Netleyned

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #108 on: May 24, 2019, 09:16:24 AM »

A few posts ref Springers have infiltrated this thread.
Would a Mod kindly move to the appropriate section
TIA
Ned
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clockworks

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #109 on: May 24, 2019, 09:47:02 AM »

A few posts ref Springers have infiltrated this thread.
Would a Mod kindly move to the appropriate section
TIA
Ned


Sorry about that. I originally posted on this thread because I have bought the same kit to do as my second build. I then posted that I have bought the same motor as the OP to fit in my first build. Not my intention to derail the thread.
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Stan

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #110 on: May 24, 2019, 10:57:03 AM »

HI Dave the motor is  re 540 /1 7500 at 6 volts with a stall current of 8 amps at 6 volts.
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DaveM

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #111 on: May 24, 2019, 12:31:10 PM »

Stan
If there's such a thing as a 'bog-standard 540' then that's it, so 7.2v with the 30mm prop should be OK - just like it was before the upgrade. My model had a 555 which is more torquey but a lot slower, hence my using a larger prop.

DaveM
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #112 on: May 24, 2019, 07:38:23 PM »

I noticed at the start that the cross sections of the plan show a rounded hull. I didnít know how to relate this until chatting with Richard Shapiro on Facebook who noted the hard chine appearance that some modellers have adopted. This is probably very much easier than creating the original soft chine curves of the kit creators intention. I will be sticking to the plan to be authentic in shape.
Very much looking forwards to continuing next Tuesday
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ANDY
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chum444

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #113 on: May 24, 2019, 08:40:50 PM »

I noticed at the start that the cross sections of the plan show a rounded hull. I didn’t know how to relate this until chatting with Richard Shapiro on Facebook who noted the hard chine appearance that some modellers have adopted. This is probably very much easier than creating the original soft chine curves of the kit creators intention. I will be sticking to the plan to be authentic in shape.
Very much looking forwards to continuing next Tuesday


Well on you for sticking with the rounded chine which was typical for that era lobster boat. For lobster boats the hard chine did not evolve until much later.


Bill  :-))
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #114 on: May 27, 2019, 11:23:24 PM »

A busy day
I made a decision to plank the bottom rather than the sides first in contradiction to the instructions.
It would be very difficult to see that you had completely resin coated the inside with the sides on first.








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ANDY
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #115 on: May 27, 2019, 11:30:25 PM »

For glassing the inside areas I made paper templates to mark the cloth for cutting











I added support for the modified custom length prop tube end. (modelboatbits)






Repeated for other half






Finished by resin coating all inside bare wood through the oval cut outs
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ANDY
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #116 on: May 27, 2019, 11:35:03 PM »

I concluded the instructions for marking out the side sheets was utter nonsense unless you have three hands.
I opted for making a paper template for these too . Then cut the balsa 1/2" oversize.

Once the side sheets are fitted the hull will be sanded to the profile of the plan bulkheads.
I'm not going to do these until my deck is ready.
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ANDY
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #117 on: May 28, 2019, 12:18:51 AM »

The eagle eyed may have noticed my transom is not to plan.
Somehow it ended up short in length so I have added another thickness of ply to correct this. I am using a deck skin on top of the original so this will fit to plan now I have made the correction and the ply edge will be covered over.


All will become clear later.


Another change to instruction manual
The side sheets will be a better easier fit if the bow blocks are fitted and shaped now. So this is my next job.
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ANDY
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mrzippy

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #118 on: May 28, 2019, 09:40:00 AM »

Hi Andy I've sent you a couple of PM's re Loster Boats you may find interesting.  Paul Zippy
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #119 on: May 28, 2019, 10:16:06 AM »

Yes Paul thanks sorry I didn't get around to reply yet  :-))
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ANDY
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #120 on: May 28, 2019, 10:33:14 AM »

Prior to this build I looked long and hard for a kit.
This was the other option with GRP hull 33" long but I felt too expensive with import duty etc
http://www.bluejacketinc.com/kits/rclobsterboat.htm

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ANDY
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MidWest Lobster boat
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #121 on: May 28, 2019, 11:17:51 AM »

Heading the right direction
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ANDY
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #122 on: May 28, 2019, 02:39:00 PM »

Minimal filler required, basic shape is good enough for planking then final shaping





This is the filler I'm using from Cornwall models. Been on my shelf 2 yrs, just add some water if it goes dry.






A bonus of moving the motor is I can place batteries low right next to the keel.





A sample of my decking on the access hatch . Yet to choose a colour finish





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ANDY
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DaveM

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #123 on: May 28, 2019, 03:49:30 PM »

A lovely job thus far, Andy. My Swordsman has a similar ply deck with laser-inscribed planking. For the darker areas (kingplank and toerails) I applied several coats of Rustins Light Teak woodstain with an old but clean cotton tea-towel followed by three brushed-on coats of slightly thinned Rustins Plastic Coating, which is a very hard two-pack clear varnish. The pale areas are not stained but they are varnished.

Dave M
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Taranis

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Re: Midwest Boothbay Lobster boat 30" build
« Reply #124 on: May 28, 2019, 06:15:11 PM »

Thank you for the tips Dave  :-)


Now the rudder frame. The plan calls for two wood screws supplied. This is pretty naff unless sealing over them rendering it fixed.
I want mine removable for future servicing


Here I cut the treaded part off two servo rod horn connectors (2mm thread) . I poured thick CA in the holes and stirred it around the sides and bottom of the drilled holes with a piece of wire . Then inserted with a screw and more CA and removed the screws before complete set.
The rudder frame made to the plan then I've lined the holes with brass tube and fitted with Araldite rapid before countersinking after dry. The brass tube is to prevent the wood crushing when the screws are tightened.


I have made it to accommodate the 50mm prop even though I'll be fitting possible a 45mm brass








Then I've given a good coat of finishing resin and re tapped the holes before set



Likewise to the frame . These will be sanded and coated again.  For final fitment after paintwork I'll use silicon grease on the threads and mating surfaces.
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ANDY
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MidWest Lobster boat
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