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RE: RC Surfer - 8/16/2012 4:51 PM   
bearcave


 

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From: sydney, AUSTRALIA
Status: offline 		YPC don't you ever sleep!

But while your into fins what would be your thoughts on a bi-fin without the downforce tabs.... sorry mrs YPC but i had to ask.


F1TUNNELL..... IMO any inspiration from J Lo can only be good for an rc surfer girl....

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RE: RC Surfer - 8/16/2012 5:57 PM   
YPC


 

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Status: offline 		Hey BC...........sleep...........with 4 kids...... LOL .........no chance............anyway, to much sleep it a waste of 'good quality time'..........hence the 4 kids ....
We all get given 24 hrs in every day ...........its how we spend those hours, that makes all the difference.

A Bi - fin without the down force tabs ? - may run more nose down on the straight as the fin generates more drag ( in turn lift ) than a single fin. The turns also wont have as much nose lift, and the tail wont be drawn in as much.

The tabs are certainly a big part and were the fin can be tuned to better suite the board, that is why the aluminium is a good material for them to be made of.

Bro'





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RE: RC Surfer - 8/16/2012 6:46 PM   
powerpark


 

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Status: offline 		YPC The more I think about the single fin I can see how easy it can be made. I have some brass sheets laying around. Soldering it to a rod looks like it will be easy. My board likes to bounce at 3/4 to full throttle. Hopefully the single fin will help. Maybe adding some skid plates will help too. Boy you guys got me thinking!!!! Also I have been using marine wheel bearing grease. It works very well.

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RE: RC Surfer - 8/16/2012 7:13 PM   
YPC


 

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Status: offline 		Hey PP.................its that easy.......Itsfishi runs a brass plate rudder on his modigied production board with great effect. Its proven to be especially more robust as he surfs in-front of a rock face/ledge which he more than often is washed onto. Just bends it straight.

I use a 4mm thick piece of plywood - laminated with 6 oz cloth in a 3/2/1 layer sequence from top to bottom to give the area around the pivot shaft strength.

From what I have read - a start to resolving the bounce in your board would be better remedied with some weight added to the fwd keel ( at least 150 grams) and some in the very front of the housing ( about 50 grams) - ask JIMI FINDRIX to give you the details........he has got the production boards balance 'waxed'

The trailer wheel bearing grease 'will' prevent water intrusion - but - it is quite thick and tacky.......a lighter grease will be 'easier on the motor. remember - you are doing a RPM of 25000 plus.......

Bro'





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RE: RC Surfer - 8/16/2012 7:24 PM   
jocktime



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 Mort,
    Your 5 cell battery should be here today or tomorrow.

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RE: RC Surfer - 8/16/2012 9:12 PM   
K-H2o


 

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Status: offline 		   OOps

< Message edited by K-H2o -- 8/16/2012 9:37 PM >

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RE: RC Surfer - 8/16/2012 9:24 PM   
K-H2o


 

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Status: offline 		   Bearcave-  Definitely use Grease!!  You can cut the bushings in half  1/2"  is plenty long on each end but if it is a long shaft I would support in the middle.  A syringe works good to get the grease in the tube.   

    Dom -  I make custom Rc Boards !!!    That is what you are seeing on the videos.  I have used the Boardshark guys on them cause it was easier than making my own dude.  So you don't know what   KV  stands for either ?  We need Tripper to come thru and get us edumakated.

     Aloha, KH

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RE: RC Surfer - 8/16/2012 9:31 PM   
K-H2o


 

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internet problems



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RE: RC Surfer - 8/16/2012 10:45 PM   
Cananzi



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Status: offline 		karl


Do you have much problems with the boardsharks dude snapping ?

I wonder how hard it would be to make a custom guy that turns his body like the boardsharks guy. I think It enhances the realisim and looks sick.


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RE: RC Surfer - 8/16/2012 11:29 PM   
powerpark


 

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Status: offline 		YPC Very good photos of the rudder / fin. This will be so cool. I can try different size and shapes. Off to Home depot to get some supplys.

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RE: RC Surfer - 8/17/2012 2:43 AM   
YPC


 

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Status: offline 		Sorry Karl !...............some one once posted after seeing one of your video's that "that was the most modified 'BoardShark" so I assumed it was.
I would love to see some 'detailed photos' of your custom board.

As for what the kv 'abbreviation' stands for -Its simply a 'unit indicator' for the potential number of revolutions per volt. ..............I would guess something like "kinetic velocity"..........LOL

Hey..........Leopard has 'all the secrets'

Bro'

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RE: RC Surfer - 8/17/2012 4:03 AM   
K-H2o


 

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Status: offline 		   Yo -  Thanks for clueing me up on what kv is not.  My brain has to know what everthing means. 
     The guy on a boardsharks will usually go for a while before falling apart. I've had 5 of um.  The best thing is to add some reenforcing around his ancles with fiberglass cloth and epoxy glue.  I was attracted to the realism of that figure from the get go and have made him work.  It actually inhances the turns not just the look.  I have a new radio that I made that is a 3 axis single stick and a trigger.  Maui John can drive my guy better  than I can right now.   I'm working on making a figure, but it is a tough job.

    Aloha, Karl  

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RE: RC Surfer - 8/17/2012 4:28 AM   
kitekook


 

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Status: offline 		Ok, Since were talking fins...I have just completed my first Twin Fin...photos will come soon...

But my dilemma was when I was installing the tube that they go in...

Do I make them perpendicular to the deck? Which I did...

Or, do I make them perpendicular to my 15deg Vee bottom? they would look nicer...




I was just driving home from the model boat pond...when I had this thought....would the outside fin actually lift the outer rail...and drive the inner rail deeper into the water, initiating a carved turn..like in skiing...edge set rebound.... causing a more 3d effect???

Some sort of modified Rudder Dom...Rudder Tom?

Any thoughts? Might just have to try it...have some room for an extra set of holes

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RE: RC Surfer - 8/17/2012 7:34 AM   
YPC


 

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Sun is out............Surf is promising...........Bro' has his Comp Top.........To-day is the Day for board #5 !

Bro'





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RE: RC Surfer - 8/17/2012 9:48 AM   
YPC


 

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Status: offline 		Hi Karl.........I dont think my 'guess is that far from the 'mark'..........

I reckon this article should 'ease the brain'.......as I said - kv is simply the unit indicator. http://www.flyelectric.com/ans.kv.html

extracts from the article.

KV as we use it refers to the rpm constant of a motor - it is the number of revolutions per minute that the motor will turn when 1V (one Volt) is applied with no load attached to the motor. In summary, we call it revs per volt - but do not think you will obtain those revs when you attach a propeller; obviously the revs will be reduced because of the load.

What does the KV tell us? Well it is related to the power out from a motor, or more usefully the torque level of a motor. It is determined by the number of winds on the armature (or turns as we sometimes call it) and the strength of the magnets - you see, there are so many variables with electric motors. So KV allows us to get a handle on the torque we can expect from a particular motor.

Bro'



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RE: RC Surfer - 8/17/2012 10:13 AM   
bearcave


 

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Status: offline 		KH thanks for the grease input.... i was useing grease but went to oil for the ease of cleaning out and re-oiling...

Some guys i know run boats and use oil for the free running benefits but then again they are always on it and don't sit out the back waiting between sets with water leaking up their shaft... My biggest prob is that my boards may get lots of runs one week then nothing for a month.. I have to work on getting them out there more regularly.
I dont need the ultimate performance so i will check out the grease scene again... Three bearing system sounds good.... syringe pumping the grease idea way cool....

YPC I've often wondered why the ducks on your test pond never seem to fussed in your vids.... any time i do a test run at my local boat ramp our feathered friends take off pretty quick lol..... reckon you may have run a few rc boats in this pond and tippin the 2nd generation of ducks may just say to each other "no worries bro's its just Dom doin another test".... lol




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RE: RC Surfer - 8/17/2012 10:31 AM   
YPC


 

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Status: offline 		Hey BC............your right...... we've been here since 1990 ........so there great grandaddy told them all about these crazy boats that come 'flying bye'...........LOL

They are more afraid of my kids !

For those who were wondering why I had not launched Bro' earlier this week...........some pics of our local harbor been hammered by the storm surf.

Bro'



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RE: RC Surfer - 8/17/2012 4:48 PM   
YPC


 

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From: Cape Towm, SOUTH AFRICA
Status: offline 		Hit the beach at lunch time today - swell 4ft - bumpy - close out sections - not great for rc surfing.............anyway.......ran three battery packs !

Was very happy with the boards overall performance in the conditions. Very stable - rights easily- lands flat - rides the face well - the BI-Fin definitel works better on the wave.

I was even more impressed with the HK $14 radio ( with the new longer antenna - still only in the housing)
I must have surfed at least 300 ft out - in some serious close outs and 'did not' lose a bind once...........I'm still amazed.

No leaks at all......I only ran each battery for 10 minutes 'as they are new' - used 2500 mA's = Average draw of 15 Amps = Avg. 166.5 Watts = Avg. 250 mA's /miute = 20 minute run times using a 5800 mAh pack (85%) - batteries will get better as they run in.

The video footage was terrible - my camera just could not 'focus' on the ocean - it is all 'blurred'. I am going to try another camera to-morrow........hold thumbs.

Kite - fitted a splash guard which I saw in one of your boards a while back to trap the grease and any water spray............worked well........no mess.

Have a good Friday All!

Bro'



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RE: RC Surfer - 8/17/2012 6:30 PM   
Hughengland



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Status: offline 		Cape Town has some insane photog hiding behind the lighthouse with a camera in Dom's storm photos.
I would love to throw my rc Sheila into a wave as thick as those shown breaking over the harbor jetty.
Is that Simonstown?
Good to hear your #5 build passed all tests with good marks.
Maui still has no waves..............

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RE: RC Surfer - 8/17/2012 7:35 PM   
YPC


 

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Status: offline 		Hey Hugh........its the small fishing harbor - Kalk Bay harbor, nestled in False Bay, close to Muizenberg.........you may have had a view beers at the 'Brass Bell' directly opposite it- years back when you were over here........its a very famous little village......very picturess.......with tons of art - antique - coffee shops and various pubs & restraunts.........very laid back.

I dont know about 'throwing Sheila into one of those waves...........that is unless you dont want to see her again........those waves are 'seriously powerful'.....they have often smashed the fishing trawlers on the opposite side of the wall.....

'Kalk Bay Reef'.......is also another world famous surf spot.......not for the faint haerted - when it is PUMPING........very hollow Left Break.

http://www.flickr.com/photos/11476484@N04/3958503608/

When I saw this pic it reminded me of your recent contest photo......

http://www.flickr.com/photos/11476484@N04/3958502448/

Hoping to capture some great waves and footage to-morrow......................

Bro'





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RE: RC Surfer - 8/17/2012 8:06 PM   
K-H2o


 

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Status: offline 		  2.4 GHz -   Some info for the 2.4ghz users.  I was working with a friend yesterday who is a computer engineer and knows a bit about radiowaves.  He told me that the 2.4GHz is an unrestricted band width and is full of users from cell phones to garage door openers for starts.  Then it is a sub- frequency of the microwave frequency ( 2.4 and microwaves are on even divisions 1/2, 1/4 etc.)  Microwave ovens use radio frequencys to heat up the water molecules in food to make it get hot or cook.  So 2.4GHz is more easily obsorbed in water than other frequencies.
   Lastly a lot of coding is used to keep out interferience now a days like Spectrum radios. So when the board comes up from a wipeout it takes time to reconnect to the code of the Tx not just find a transmition.  Hope I remembered all this right !!!  
    Thanks YPC  I want to change my middle name to Vincent so I can be  Kv H   ,,,Nah   I like KWH   ( kila watt hour)       Better stay with my Dads humor. 

    Aloha, Karl

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RE: RC Surfer - 8/17/2012 8:17 PM   
YPC


 

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From: Cape Towm, SOUTH AFRICA
Status: offline 		Another good bit of advise for 2.4 gig is the TX antenna direction when we are surfing..............I set mine at a 45 degree angle toward the water............if it is pointed up......it heads into the sky.

Read this article and watch the video.............

http://rcadvisor.com/rc-transmitter-antenna-direction



Bro'

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RE: RC Surfer - 8/17/2012 11:39 PM   
trippergreenfeet


 

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Status: offline 		This is an informative read regarding 2.4ghz. The bloke who wrote it is an EE and  does all the testing of Radio systems for approval by the MAAA in Australia.

www.archeli.com.au/forums/showthread.php

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RE: RC Surfer - 8/18/2012 4:15 PM   
bearcave


 

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quote:

ORIGINAL: YPC

Kite - fitted a splash guard which I saw in one of your boards a while back to trap the grease and any water spray............worked well........no mess.

......................................................

While you guys are workin out the real stuff regardeing KV lies technical secrets fins hulls tails and everything else important... i thought i might add something simple but good...

Splash Gaurds are Awesome... not only for the spinning stuff that flys everywhere but also the fact your batts and leads may be caught up in those spinning things.,,

Electrical Conduit is good stuff.... easily cut with a hacksaw blade and can be formed to any shape with some heat... in these pics there are many mechanical bad things happening with this hull but if you disregard those things and focus just on the gaurd and how you could customise it to suit your needs you will see its very simple and needs no support, the battery leads hold it down....

KISS.. Keep It Simple Stupid... works for me but rarely pretty... lol



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RE: RC Surfer - 8/18/2012 7:34 PM   
RC HAWAIIAN STYLE



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    Thats a great idea , i hate all that grease flying around and if water got in it will stop the spray,     you and kite got all the tricks. 


 maui john 


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