Build log of RCIndia user Anand's boat...

Started by alokhovercraft, May 30, 2012, 10:51:40 AM

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alokhovercraft

Hello Members and guests,
                                   I am very happy that one of our member Mr. Anand Paranjpe trusted me :giggle: even though I am a beginner and gave the full commisioning job of his Balsa R/C Boat kit made by our great VC Sir... Suggestions/tips needed as I have never worked with balsa before. :help: I understood the bulkhead positioning only after seeing Roopesh Sir's build log of his yellow cabin cruiser...I plan to use a 3.175 mm shafted size 540 brushed motor with 1:3 reduction gearing as suggested by Roopesh Sir.. I plan to use a single hobbyking 50mm diameter 3 blade boat prop. I have no idea how much torque servo will be required for the rudder...I think a 6-8 kg-cm torque servo should do the job....
12 Volt Madness....!!!

alokhovercraft

 :help: :help: I have no idea how to go ahead or maybe some parts were left out in the kit...seeking expert advice pls call on +919321149564
12 Volt Madness....!!!

alokhovercraft

12 Volt Madness....!!!

alokhovercraft

sharp bend on top strip rectified as told by VC Sir...
12 Volt Madness....!!!

VC

Growing old is mandatory, growing up is optional!

alokhovercraft

Attached the bottom strips...
12 Volt Madness....!!!

alokhovercraft

 :headscratch: :headscratch: :headscratch: as I am having hard time figuring out which precut sheet will go where,as all are in different shapes... :help: is the long rectangle shaped sheet supposed to go on top side?? :headscratch:

12 Volt Madness....!!!

VC

Pl post a picture of all the different parts and I will try and help out. My kit is not with me right now.
Growing old is mandatory, growing up is optional!

alokhovercraft

the kit contains sides labelled 1A,1B, and SIDE. I am wondering by placing the 2 sides marked 1A and 1B adjacent to each other so that they can be placed on their respective sides.. which side goes on top? It either has to be 1A or 1B. :headscratch:
12 Volt Madness....!!!

roopeshkrishna

nice progress.. and you do not need a 5 or 6 kg servo, instead need only a mocro servo of 9 gram, and make an indirect drive shaft assy to hold the rudder.. never slips or loose torque..and add a 1 ml syringe as a flutter absorber.. can save ample of space, inside.. have a nice build.. :thumbsup:
Phoenix.........

alokhovercraft

12 Volt Madness....!!!

roopeshkrishna

Alok, mostly, we connects the servo arm, directly to the driven arm.. instead, make a cross over lever system, with thick bicycle spokes, and can feed one end to the driven arm, and the other end of the driven arm, can be connected to a simple syringe, as a flutter absorber.. and by adding a 50/50 rudder it will works nicely and gives you a precise control of direction especially on a big craft..  :thumbsup:
Phoenix.........

alokhovercraft

will understand better if you can kindly upload some pics/hand drawings of the servo link setup
12 Volt Madness....!!!

roopeshkrishna

i am witing for the monsoon, to start the work of this boat.. this will finished in to a great trawler, of tradition, as belongs to our harbor.. you can see its easy to build.. and will be very nice when finished.. long.. stable.. and thanking to respected Veteran VC Sir, once again for this great kit.. :salute: :salute: :salute:
Phoenix.........

roopeshkrishna

Sure.. will up load a good log to make servo link set up.. its easy and saves lots of space and battery..  :thumbsup:
all sides are easy, as we keeps the ratio in mind.. excess can be removed by a good HD art knife..
Phoenix.........

roopeshkrishna

all gaps were filled by PU putty to save weight and dry time..
and as i am going to finish as a trawler, my intention to release her in real river.. so, here i need immense torque with needed speed.. so, already reworked on three identical motors, with identical gear boxes, in to 6 volts , and 2 amps, ratio, to save battery life and reduce load.. with three props and gear boxes, she will swim for hours.. with ease..
Phoenix.........

roopeshkrishna

and i have already completed needed props for this one, as two choice.. one set with high hydrofoil blades, for great torque, and one set for high speed.. both are configured to run inwards, to get more torque in pulling, while the third one at center always turn at port direction.. to comply with corriolis effect..
this one will be a nice one when finished.. with good stability.. even at high speeds..  :thumbsup:
have nice builds.. :hatsoff:
Phoenix.........

alokhovercraft

Im still figuring out which side goes where... :headscratch:
12 Volt Madness....!!!

alokhovercraft

trimming the bulkheads to the sidestrips height by using a carpenters jack plane...
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roopeshkrishna

Alok, dont worry.. first of all take the two thick 5 mm top sheets amd make sure are identical.. then make sure all bulkheads are in 90 degree harmony, then check for un even protutions.. make it clar all by heavy duty art knife and sand paper on block.. after making sure all, you can fix the top sheets with cyano glue.. and trim out the excess to the this strips that you already fixed.. leave a margin all arounbd the top plate, at least a 4 mm.. then find two identical sheets for bottom, some times it will be this 4 sheets, and start to lay the thin sheets from the keel side to out.. glue it.. and trim the excess with a margin of 4 mm all around.. then find the sheets for the sides, and must glue within two top and bottom sheets.. glue well.. after drying can sand it out with sanding block with 120 grit.. smooth with 200 grit paper.. apply putty.. sand it again.. apply final coat.. paint it.. fix it.. RCyit..  :thumbsup:
Phoenix.........

roopeshkrishna

Alok.. no need of heavy tools.. need only sanding blocks, with 80 or 120 grit..its too soft..
Phoenix.........

VC

Roopesh as I don't have my kit with me right now, I am not being able to guide Alok on the assembly process. Do you remember which parts were numbered what? Also can you please post some more detailed pictures of your build process so that Alok can see which parts go where?

Alok I will try to get my kit across tomorrow from the godown. Actually, a cat has given birth to a litter of beautiful babies in my godown and I don't want to disturb the new family.
Growing old is mandatory, growing up is optional!

roopeshkrishna

VC Sir, i already gave a clear idea to Alok, to build this, and the sheets marked as B1, pair, in 5 mm as top, written as SIDES, for both sides, and rust as bottom.. and now searching the written DVDs for the older photographs, as i writes all files when it reaches a good thick MB level, in DVDs.. just looking on.. and its easy to build, and still remember have to add some sheets together to attain the final shape.. that can see my posted photographs..  :salute:
Phoenix.........

alokhovercraft

sides labeled 1b go on top, 1a go to bottom, side go to side.. kindly give on how to hold the blade to trim the bulkheads parallel to the edge...a pic will do the trick...as im inexperienced with balsa...
12 Volt Madness....!!!

alokhovercraft

dear VC sir, its great to hear about the new cat family!! :)
12 Volt Madness....!!!