Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Navy - Military - Battleships: => Topic started by: Krishna on January 08, 2013, 09:23:34 am
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Good after noon all respected Modelers..
here, is one of my humble effort to realize the ever potent and classic war machine of WW2.. the British Vosper Perkasa.. as it is hard to explain the history here about this craft, anyone can Google it once.. this craft was driven by three gas turbo shaft engines, in mission, and diesel engines were used to maneur.. so we can simply imagine the potential of this machine.. so, she must be fast.. and became one of the greatest machine in my collection..
this time also, there is no plans to download, but entire scaling is done by orthographic projection, (3 View), and scaled to 30 inches, as my all PT boats are designed in this scale.. a great combination RCying.. this one is 100 % scratch built, except the motor and simple servos..
here i starts from big "0" from my work table.. here i prooves once again, we do not need any extra ordinary tools to make an outstanding,practical craft.. here my tools are a heavy duty art knife, a point iron, nose plier, and some hand tools..
here we are.. after proper sketching, template is made on a drawing paper.. then on foam board.. this one is fully made of foam board of 3 mm..
as we are scratch builders there is no restrictions.. adding the bulkheads, up to me needs, while keeping all aspects for internal machines..
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my server is down..
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it is too easy to make a hull from foam board.. after thermocoal, to me, foam board is the best material for RC boats.. as scratch building, we can add bulkheads anywhere we likes, while keeping an eye on internal mechanisms..
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the hull is ready.. it took about an hour.. time to fix motor.. at first i have to add a water cooling jacket for motor.. this jacket is made from an aluminum C channel..
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motor on mount.. can see the water cooling jacket..
motor jacket is ready.. this time, instead of fast epoxy glue, i used PS grey here to seal water jacket..
time to add drive shaft assy.. outer tube is a body of a sketch pen..
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inner gaps are sealed with PS grey..
shaft fixed in a convenient angle..
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motor installation.. coupling, is a bicycle spoke.. cooling lines- aquarium silicon tubes..
rudder servo- a 9 gram servo..
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in detail.. it works 100% perfectly without any fail.. the same line from the motor jacket can be used to cool the ESC also.. so, a 20 amps ESC can use here as it can handle more current with water cooling.. this motor is a powerful one.. it rated at 1300 RPM/Volts, and with a wattage of 275.. perfect for a high speed one...
all intake scoop and exhaust are made of copper tube as my lake is frequented by salt water as shutter opens..
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rudder panel is foam board..
before starting a dry run is a must.. so i draw the basic structure on a thick card paper, as trial..
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started building.. 90% of the superstructure is paper.. later perfectly water proofed..
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one of the extra ordinary feature of this craft is it's super structure.. fascinating..
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it is easy with paper..
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perfect...
and dry run..
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reassuring everything in scale..
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adding tail section and exhaust for diesel engines.. from sketch pen body..
first time priming..
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antenna mast is a ball point refill..
adding radar base..
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steering is made of aluminum wire..
torpedoes are made of glue caps and pvc pipes..
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the shroud around prop is same pvc pipe..
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primed and primary shade..
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torpedoes stands are from foam board.. and in place..
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torpedo final coats...
all guns are made of foam board, some refill tubes and wires..
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guns in place..
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added rivet details..
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main gun.. primed..
stand is foam board.. easy to make..
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hull primed..
basic water line painted...
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i finished her in to dark magnesium grey.. matte texture.. a great colour for war crafts..
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full painting is completed.. all paints are NC based.. total cost of paint about 50 Rs/- ( 1 U S Dollar)..
the deck painted in rusty green.. careful masking is needed to spray over deck.. by adding a little chalk powder to paint, along with a pinch of metallic silver gave me the finish of the rough surface.. on big crafts we can use strained sand..
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from any angle she is a stunning beauty..
trial with torpedoes..
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time to add lights.. all lights are based on L E Ds.. and driven by a third battery of 11.1 Volts/ 300 ma/H..
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at night she will be awesome view..
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adding the wind shield.. with O H P sheets..
Radome is made of foam board..
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the radar is rotated by a micro servo, converted for continuous rotation.. can control with TX from start to speed..
time to add decals.. all printed on an A4 paper.. cut and paste..
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instrument panel and turbo shaft engine exhaust covers..
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time for action..
with everything on board she weighs about 1100 grams..
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mission time...just before official mission.. :-))
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on my first test runs craft behaved too erratic.. because of the light weight, and powerful motor, excessive nose tipping was a great head ache.. because of this nature, control was almost impossible at high speeds.. so back to work table.. and added two more thick ridges on bottom.. still she was not tamed.. so i used a head lock gyro, and an active stabilization system on it.. the active stabilization is based on a servo driver.. explain later.. so she became super responsive.. at any speeds.. and i reduced the prop pitch a little, and worked well..
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behold.. how nice she is to see.. i am too fascinated with her by all means.. look.. and performance.. we can simply imagine the fear that this machine inspired on enemies on its time..
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more actions follows.. with on board camera, and night patroling..
once again.. all respected Modeling Friends.. see here we do not need extreme stuffs to make a good craft.. only some handy materials.. total cost of this craft to me is only 400 Rs/- from my table to water.. and she is an excellent one for RCying.. so, wish you all a great happy new year with ample of crafts.. will be back with new videos and new crafts.. :-))
will she works nice..?
see cool action here...
http://www.youtube.com/watch?v=rUus17yDRlA
tight fast maneuers..
http://www.youtube.com/watch?v=UuzRYqs6ims
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A Masterclass in one go! :o
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thank you Martin Sir..
here is the on board camera action..
http://www.youtube.com/watch?v=LS88pqucoS8
and night patrolling..
http://www.youtube.com/watch?v=yFu86iSRXvs
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as martin says, a masterclass in true scratch modelling on a shoestring and stuff that many of us throw away..........and a masterpiece as well..........you should be very proud of it krishna....
well done and a superb model.
neil.
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Thank you sir..
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Good form Krishna!It just go's to show that you don't need to part with a kings ransom to get a good looking boat on the water, great performance too..... :-)) :-)) :-))
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Sir, thanks for the inspiring words..