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AVATAR - II
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«
on:
October 29, 2012, 08:59:43 PM »
Sb_Maharana
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AVATAR - II
Tweet
Maiden videos of RC Wind surfing and RC Surfer...
while testing this surfer it was almost night... sorry for the video quality.
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Reply #1 on:
October 29, 2012, 11:23:00 PM »
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Re: AVATAR - II
Welcome Back Maharana!
Good to see you back in action! Nice build!
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Reply #2 on:
October 30, 2012, 01:24:34 PM »
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Re: AVATAR - II
What is the material that is used to make the board.
Shreekant
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«
Reply #3 on:
October 30, 2012, 07:37:08 PM »
saahil
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Re: AVATAR - II
sir that surfing boat is one peice of beauty.
really cool.
and the dummy blue surfer looks really nice.
congrats on this.
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Reply #4 on:
November 02, 2012, 12:03:03 PM »
Sb_Maharana
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Re: AVATAR - II
thanks Sreekant & Sahil.
The board is made of fiberglass (two piece molding) and came up nicely, no water leakage etc... the surfer is keeping / tilting to right on higher speed, need some counter weight to left and in the wind surfer the size of centre board has to be increased. will update the results soon.
the next couple of builds ( RC Kayak and RC Rowboat) are in progress......
Re: AVATAR - II
Photo0007.jpg
(53.92 KB, 800x605 - viewed 1136 times.)
«
Last Edit: November 02, 2012, 05:48:49 PM by Sb_Maharana
»
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Reply #5 on:
November 03, 2012, 01:09:36 PM »
roopeshkrishna
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Re: AVATAR - II
Wow.. nice machine Maharana sir.. was waiting for the action videos..
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Reply #6 on:
November 03, 2012, 01:37:59 PM »
saahil
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Re: AVATAR - II
it appears that you are using the same dummy.
really nice.
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Crabs are just pets you carry around on your groin....
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Reply #7 on:
June 04, 2013, 12:20:07 AM »
Sb_Maharana
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Re: AVATAR - II
The mechanism of rowboat or kayak is very simple when the boat is steered with rudder, but without rudder both the mechanism gets complicated.
I have seen some youtube videos where the rowboat is controlled by 4 servos and programming, but I trying something simpler mechanism where oars can be synchronized automatically after disengaging any one of the oars ( I mean oars should hit the water at the same time after each successive turn)
And in the case of sailing the kayak the figurine should oscillate while kayaking and bends more while taking tune to the opposite side.
«
Last Edit: June 04, 2013, 09:25:25 AM by Sb_Maharana
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Reply #8 on:
June 04, 2013, 07:14:27 AM »
sanjayrai55
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Re: AVATAR - II
Very nice, sir. This video shows 2 servos? One for each oar?
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Reply #9 on:
June 04, 2013, 09:26:54 AM »
Sb_Maharana
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Re: AVATAR - II
Sanjay bhai, there are 4, 2 for reciprocating and 2 for lifting oars.
and this very interesting & great video... rc canoes in action
http://www.rcmovie.de/view_video.php?viewkey=1cca999f55a43db2ce04
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Last Edit: June 04, 2013, 11:28:14 AM by Sb_Maharana
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June 04, 2013, 09:42:52 AM »
sanjayrai55
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Re: AVATAR - II
OK. At first I saw only the reciprocating!
The canoe is very, very good!
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Reply #11 on:
June 26, 2013, 12:04:33 AM »
Sb_Maharana
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Re: AVATAR - II
I am making couple of rowing mechanism. One with locking type mechanism and the second one where oars can be lifted out of water. This page was quite helpful building the 2nd one.
http://www.modelboatmayhem.co.uk/forum/index.php/topic,2604.0.html
Here is the video:
«
Last Edit: June 26, 2013, 12:36:35 AM by Sb_Maharana
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Reply #12 on:
June 26, 2013, 07:04:52 AM »
sanjayrai55
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Re: AVATAR - II
Very nice. Now put it on a boat
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Reply #13 on:
June 26, 2013, 11:01:28 AM »
aniket210696
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Re: AVATAR - II
that windsurf is amazing!
what will be even awesom-er is if you can build a sailboat or windsurf, where a weighted keel is not required. maybe a weighted figurine made, hooked up to a gyro, so the more the boat heels, the more the figure will lean outwards... tacking it will just get one step more challenging
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Reply #14 on:
June 26, 2013, 02:40:41 PM »
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Re: AVATAR - II
Brilliant Maharana..This is a marvelous piece of Engineering.
Superb!!!!!!!
Shreekant
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Reply #15 on:
June 26, 2013, 02:50:33 PM »
Sb_Maharana
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Re: AVATAR - II
Thanks Sanjay bhai, Sreekant,
Fixing the mechanism inside the boat is also a big challenge
weight, size of the boat, waterline etc; all counts.
@Aniket
Even if you control the movement of the figurine by Gyro-Servo, the keel/centre board can't be eliminated.(Which transfers the wind force to forward motion) and in the case of Wind Surfer a moving Figurine will obstruct the movement of main sail.
This is nice animation of Sailboat:
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Reply #16 on:
June 26, 2013, 03:21:29 PM »
aniket210696
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Re: AVATAR - II
@sb maharana sir, the keel(or centerboard for windsurfs) is mainly there to direct the energy accumulated from the wind so the boat moves forward and doesn't drift. in a real windsurf, the boat heels, and the sailor hikes to counter the heeling. the weighted keel system is usually used for large yachts where a human cannot hike.
the downside of a weighted keel system is the inherent drag caused by the weight, and the extra weight itself. if instead one could setup a 180 deg servo, which swings a weight around, it can simulate the hiking system of a real boat, which would not only reduce the weight required, but also allow the boat to sail faster, and utilize the minute winds it collects in its sails better...
i dont know how feasible it is, but i think if possible, it will be a pretty solid system..
in the case of a windsurf, instead of a figurine, you put a swinging weight system at an angle. so the weight, at the end of the swing, will heel the board just enough to allow it to plane..
regards
aniket
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«
Reply #17 on:
June 26, 2013, 10:31:55 PM »
Sb_Maharana
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Re: AVATAR - II
I think you are looking something like this:
http://robroy.dyndns.info/RCmodels/A600/overview.php
video of the same
«
Last Edit: June 26, 2013, 10:45:11 PM by Sb_Maharana
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Reply #18 on:
June 27, 2013, 03:07:57 PM »
aniket210696
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Re: AVATAR - II
aaah! yeah!! thats exactly what i was talking about!
that yacht is quite like a laser....
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oui
«
Reply #19 on:
July 18, 2013, 11:07:01 PM »
Sb_Maharana
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Re: AVATAR - II
So far so good, made a boat with sunboard, the size is 14x4.5 inch & weight is approx. 650 gms., (it should be around 450 gms.). Tested the boat, oars are quite ineffective. Planning to replace the geared motor with a lighter one and slightly modify the shape of the hull for a better positioning of the oars.
Re: AVATAR - II
DSC_1171.jpg
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Reply #20 on:
July 18, 2013, 11:11:40 PM »
aniket210696
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Re: Re: AVATAR - II
supposing you increased the size of the paddle?
Sent from a potato using a lamp
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oui
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Reply #21 on:
July 18, 2013, 11:13:51 PM »
VC
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Re: AVATAR - II
All the best! What is the finished product going to look like? What design do you have in mind? This mechanism is an ingenious piece of work and I am sure you will hone it to perfection.
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Reply #22 on:
July 18, 2013, 11:23:17 PM »
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Re: AVATAR - II
Maharana !! Good Show !
i expected Turuk Makto riding the
Last Shadow
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Reply #23 on:
July 18, 2013, 11:40:30 PM »
Sb_Maharana
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Re: AVATAR - II
Thank you Sirs.....
Due to overweight the boat is keeping too deep into water, and limiting the external length of the oars. The external length of oars should be 3 times bigger than the internal, which means the paddles should moves 3 times bigger than the internal mechanism. I have two options left (1) increase the height of the boat (2) reduce the weight so that waterline match the actual.
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July 19, 2013, 06:30:25 AM »
sanjayrai55
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Re: AVATAR - II
Could you change the angle of the oars? Make it a shallower angle?
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