surfcurls

What Coupling did you use on the "Brushless" Motor That Failed ?

R a i n e r

ROBBE type "Zentrierkupplung":
http://www.conrad.de/ce/de/product/3...ELTEIL/7101105

The middle (red)part broke. It's of plastichas many slots to make it flexible.
I glued it together again with 5-minute-epoxy and wrapped it with a layer of glass-fibre.
Primitive repair but now it holds again!! ;-)

surfcurls

Ok, It Is Not The Brushless That Is A Problem, It Is The Plastic Coupling.

Brushless Is The Best Way To Go, More Efficient, And Will Cool Better With A Proper Cooling Tunnel.

Burushed Motors On These Boards Are No Longer Used In Most all Boards...

R a i n e r

Coupling is repaired - now everything is fine.

However, I was a bit surprised about the shorter runtime of the brushless motor.
Sure, more power needs more current, but I thought thiswould becompensated by the brushless' higher efficiency - well, it wasn't.

Jimi Findrix

Awesome Rainer,

Well done mate, looks like you and your son really had some fun.
Love the photos.
That place looks gtreat for RC Surf alright.

Sea Ya

JIMI

Jimi Findrix

Rainer,
Did you have any water intrusion in the hull or motor compartment?

JIMI

R a i n e r

Cananzi

hey fellas
anyone here solder there ownconnections? Is there a special solder and flux to use? Im guessing seb will know lol


cheers brett

Jimi Findrix

Cananzi,

I know nothing.
But Curlzy and Seb know.

How did that rider turn out?

JIMI

goggz

na its all good to solder ya own brada i use the stuffs from supa cheap if ya feeling pro a bita heat shrink over ya connectors to avoid the dreaded salt if need be..

Cananzi

Guys

I had never soldered before and after a few you tube vids and a trip to jaycar electronics to get a soldering iron and solder etc, I managed to change my connections on my chargers which i thought would be a good practice. Learn something new everyday they come up spot on!


Jimi

My dudette is ok,Ineed some more cloth and resin. I ended up epoxy putting all the joins to get the stance correct and she just needs a layer of cloth over the joins.



Seb

WillIneed a new prop to fit the flexi shafts??Igot mine in the mail today. the prop end looks very small in length.

surfcurls

Most Do There Own.

It's Simple,

Start with a small 25 watt solder iron, use basic flux and thin wire rosin core LEAD FREE Solder.
All Harware / Hobby Shops Have this Available.

Then Practice on scrap Wires / Parts / Deans / Bullets to get the hang of it.

The Trick is to keep the soldered part Held firm until the solder cools enough
to Set the part in place. You Will See The Solder go From Bright Silver color
To A More Dull Silver, Then You Know Its Cooled enough to release the grip
on the part.

skowowski

Brett,

4mm threaded prop will fit fine. Solder the hole in the tube, tape and epoxy will not work. Use a prop that is around 27-28mm as you are using a 3600kv motor.

The norm for soldering is 60/40 solder (tin/lead) and a 40 Watt soldering iron. Remember to always clean the solderingiron'stip between each solder, wire brush will be fine. Goodluck learning to solder, it's a hassle the first 100 times but gets easier after practice. If you are soldering bullet plugs, you should have no problem as they are the easiest to do. Watch a few soldering vids on YouTube before you get started.

Seb

R a i n e r

"Solder the hole in the tube"

??

Do you mean soldering the M4 connection threadbetween shaft and prop?
If you take a right-turning propthe M4-thread automatically tightens while running.

I fear I didn't catch your point.
('might be a language problem ;-))
Thanks for clarification!

Take care!
Rainer

Jimi Findrix

Seb,
Does that mean my Octura X431 and Y531props won't fit with the new shaft?

The coupler has arrived but still waiting on the shaft.

I guess I may  have to order some new props before I can run the flexi thingy.

I don't even know how many kv the motors Curlzy sold me are.
So how can I know what prop I will need?


Kev and Brett,
Just tested the modified doll for water, she only leaks around the o-ring posts inside the feet..

I am gonna try and stop that, before I test for self righting quality.

JIMI

skowowski

Jimi,

I just checked the length of the propshaft thread and its 12mm, so if you are using a drive dog on your propshaft then yeah, you are going to need to buy some threaded props.

Curly would have sold you a motor around the 3000kv range, so get a prop around the 30mm range. IT MUST BE A THREADED RIGHT HAND M4PROP!

Here is a link to where i buy mine, i get the 31mm RH M4:http://www.cornwallmodelboats.co.uk/...rs_2318m4.html

About the water in the leg area.....just cut off her big toe, it lets the water flow out if any gets in.

Rainer,

I honestly have absolutely no idea about what you are thinking i am soldering, but i will try and give an answer.There is a hole in the propshaft tube where you can fit an auto re-greaser to the tube, but given the little amount of space inside the board, you need to seal it or grease will fly out. Sealing it with solder seems to be the only way to keep it sealed. And yes, a right hand prop will tighten as the shaft spins. Saw the pics, Spain does get some waves, the west coast is much better. I suffered the smallMediterraneanwaves off Mallorca for a long time.

Seb.

R a i n e r

"There is a hole in the propshaft tube where you can fit an auto re-greaser to the tube"
===> Now it's clear to me! ;-)

Mediterraneanwaves might be a little small for real surfing but sure enough for RC-surfing! ;-)

Kevinmham

Jimi. My o-ring posts also leaked. I pried off the white o-ring bucket out of the feet and sealed up the back of the post with a bit of urethane. Silicone will also work. I also put a little bit in her ankle, so no water could get into her body from there. Then I epoxied the bucket back on. Takes ten minutes. Yeah, you could cut the toe off never thought of thatalso simple !

Jimi Findrix

Thanks Seb,

I had better order some props too then.
I wish I had known that when I ordered the shaft.
Thanks again mate.

Kev,

It sound like you are onto it.
I have been doing a few experiments and came to the conclusion that removing and sealing the o-ring things was the only way to go.

I tried drilling a hole into ankles and squeezing in some Sikaflek to seal off at the ankle.

I still have one foot leaking and I made a mess of the paint job.

The feet on these dolls are as leaky as the boards they come with, Ha Ha Ha.
But I am determined to get her to seal.

Now I know what to do I might try a second one and this time get it all sealed BEFORE I paint it.

I do prefer the seal rather than drain approach if we can get it to work.
It sounds like you have succeeded.

Well done mate.

JIMI

Jimi Findrix

Kev.

I just ripped her feet right off to have a look inside.
The Sikaflek I had squeezed in had only sealed about 3/4 way across the ankle.
She is in the bin.

I am starting another one and now I know what to do I am sure I will be able to get it to seal.

This time I will start by sealing up  the feet before I even melt her.

Cananzi,

If you have not fibreglassed the feet back on your Dudette yet then seal across the ankles before you do.
Otherwise you will have to remove the o-ring sockets and do it and reset them like Kev has done

You can always use Seb's drain hole system, there is a small hole in the feet already and that appears to be for this purpose, maybe you could just drill that out a bit bigger instead of cutting off her toe. Ouch!!!

We are learning.

If I can get a Dudette (Modified Lisa Rider) to seal and stand 9 1/2 tall then I will be happy to use her if she can self right as well as my Dudes.


JIMI

Jimi Findrix

Kev,

I just did a strength test on that Dudette. She had a layer of epoxy over the entire doll.
Before I threw her in the bin I pulled her arms off, I had to pull them apart quite hard before they broke, they were very strong.

Then I tried pulling her legs apart.
They were extremely strong, I didn't think I would be able to break them. The epoxy putty and epoxy resin coat had made the legs virtually unbreakable.
So I pulled as hard as I could and after a couple of seconds one leg broke off.

If one of these can surf properly they will definately be able to handle any surf I will ever send her out in without breaking.

Now where is that box with all those Lisa's in it?

Was it easy to get the o-ring inserts out?
That will be my first job on Dudette MK II.

Sea Ya,

JIMI

skowowski

Jimi,

Do youbelieveme now when I say a Lisa doll can be made to be a hell of a lot stronger than a dude figure....

I put 4oz fiberglass cloth on her main joints and have never broken a figure since, yet i have been through about 80 o'rings as i pound her in the shore-breaks on a daily basis. (I broke 3 this morning)

Epoxy is good, but it breaks down after a while. Fiberglass on the other hand doesn't and is unaffected by salt water and is a lot stronger. Lisa's total weight with glass is 110g.

The reason I cut off her big toe is the hole under her foot is flat against the board and is harder for the water to escape, water flows out the hole in her toe immediately.

Seb

Kevinmham

   Jimi,  My o-ring inserts came out fairly easily. They weren't glued in very well at all.  I put a little flat blade screw driver under one edge, and worked it all the way around.  The silver pin that holds the o-ring and screw mount to the white bucket, is wider than the hole in the foot.  A little bit of gentle prying and presto !,  out it came.  Be sure to put some sealer on the pin before remounting the bucket in  the feet. 

      Seeing how poorly the bucket was glued in, I could imagine one decent size wave knocking Lisa off her board quite easily ! I used a good amount of glue when I remounted the buckets.  I also added a leash around her ankle and glued it to the deck, just in case !

   I also think I might do the putty and fiberglass trick to my Dudette.  Yours looks nicer than mine !  Good luck with Dudette MK II ! 

Kevinmham

  I've been trying to find anyone else around here who is into rc surfing. So far no luck. A lot of people have told me that it is the coolest rc product they have seen, but they don't have one either.  So,  anyone on this forum know of anyone around  " Victoria, British Columbia, Canada " who is into rc surfing, let me know.  The more people interested in the hobby, the better it will be !

Jimi Findrix

Hey Kev,

This will give the crew a laugh!

Dudette  Mk II

I removed the inserts with a stanley blade.
Sealed the ankles with some Sikaflek.
Epoxied the inserts back in.
AND started melting away with my cigarette lighter.

Well, the melt job didn't go too well this time and the knees ended up splitting right open and I ended up throwing her in the bin.
Guess I went too fast with it and the plastic split  and the legs were all wobbly.
The first one did split a tiny bit but I just filled the hole.

Oh well, I still have 2 left.
Next time I think I will do the melt job first and then if it works out well I will do the inserts.
Maybe by the last one I will get everything just right.

I really don't care 'cause it is a lot of fun experimenting.

Bummer Dude!

JIMI
(Gero, West Oz)