Welcome
Welcome to Racing Sparrow Model Yachts Forum

Alternative hatch cover fixing?

The Forum for RacingSparrow radio controlled yachts. Focussing on build your own scratch building, free plans for download and a comprehensive builders guide book.

Best wishes and happy sailing, Bryn Heveldt.

Alternative hatch cover fixing?

Postby Tony Jaques » March 24th, 2016, 5:41 am

Hi all,
I wonder if anyone has used an alternative to the rubber
band method of fixing the hatch covers, because for at
least the hatch over the sail servo area I can't use that
technique.
When it came to adding the deck bracing I hit a serious
problem. H13 runs right over the top of the Sail servo, and
as can be seen from one of the "attached" images, my servo
was too tall (even without the arm) to allow it to.
H13 can't be brought inboard to clear the servo because
it would still block the servo arm. (And anyway for
symetry, H14 would also have to be moved in and access to
the battery would then become impossible.) Also a failure
of the sail servo would involve destruction of the boat to
replace it. This is dreadful engineering.
I opted instead to move the deck bracing here outwards,
which at least leaves battery and servo access feasible,
though it brings the hatch edges periously close to water!
However another consequence of the servo height is that
the arm would tangle on the rubberbands; hence my need to
secure the hatches in some other way.

Any ideas please?
Tony (G3PTD)
Attachments
Sail servo area.jpg
Sail servo CU.jpg
Tony Jaques
 
Posts: 13
Joined: December 15th, 2014, 4:43 am

Re: Alternative hatch cover fixing?

Postby Pezillion » March 24th, 2016, 6:42 am

I had the same problem, I used a piece of aluminum and bent it so it steps down to clear everything. I can post a pic later if needed.
Pezillion
 
Posts: 15
Joined: September 13th, 2014, 4:58 pm

Re: Alternative hatch cover fixing?

Postby Tony Jaques » March 24th, 2016, 11:00 pm

Thank you for that Pezillion.
Yes, a new arm in aluminium, bent low enough to clear the "works" should do it. Good thinking.
Actually I am thinking of making the hatch surrounds from the hard magnetic strips that my wife uses to fix her cross stich plans to a steel sheet. Then more strips - or small magnets - on the hatch covers should keep them in place.
I Hope!
Thanks again. Tony (G3PTD)
Tony Jaques
 
Posts: 13
Joined: December 15th, 2014, 4:43 am

Re: Alternative hatch cover fixing?

Postby Pezillion » March 25th, 2016, 3:19 am

I used some of the aluminum from the keel support. Also I have my servo rotated to get a little extra travel.
Attachments
IMAG3147.jpg
IMAG3146.jpg
Pezillion
 
Posts: 15
Joined: September 13th, 2014, 4:58 pm

Re: Alternative hatch cover fixing?

Postby m-o-t- » March 26th, 2016, 12:47 pm

Hi
I run into the same problem as you.
So I used the tape method of hatch cover as this sits above the top of the deck.I found some thin clear stiff plastic of some packaging and used electrical pvc tape around the edges for a seal.
This will peel off when need, but I have be known to leave mine on for many sail trips or peel and restick using the same tape.
Depending on paint and tape you might get some paint removal but only if paint adhesion is poor.
The clear hatch cover lets you see the workings before and on a sail by...
MOT
Attachments
taped hactch gover.JPG
clear hatch cover.JPG
Maker Of Things
User avatar
m-o-t-
 
Posts: 84
Joined: May 27th, 2014, 5:58 pm
Location: blue mountain sydney

Re: Alternative hatch cover fixing?

Postby Tony Jaques » March 27th, 2016, 9:41 pm

Hi there,
Oh, that lot's really interesting, and there is quite a lot that I want to reply to, but unfortunately I am off to Scotland in a couple of hours, so I don't have time right now. I will be back next weekend, so don't go away; I will be back!
What I actually came on to do was to post my modified servo arm, which I have also mounted below the original "arm" to save a bit more room. So I will do that, then I must get ready to go.
Sorry about that.
Tony (G3PTD)

Image
Tony Jaques
 
Posts: 13
Joined: December 15th, 2014, 4:43 am

Re: Alternative hatch cover fixing?

Postby Tony Jaques » April 4th, 2016, 12:27 am

Hi,
I'm back; sorry about the delayed response.
Firstly, thank you to Pezillion. Yes, having experimented with the
sail servo, I intend to make a cutout in bulkhead D to allow the arm
to go more clockwise. Any movement anti-clockwise beyond the
centreline merely draws the sail back in again which is counter
productive. The extra movement allowed by the cutout might not be
needed, but it is too difficult to add it later if it is!
Were the rather large holes extra cord anchor points, or to reduce
weight? I would have thought that a couple of grams of aluminium would
be trivial when compared to 1.3Kg of lead.
Thank you also m-o-t. Although I am not keen on the appearance of
the tape I do like the "inspectability" of the clear hatch covers. I
did wonder about access to the on/off switch, but I think that I see
an access hole above it. I have seen comments about using a sail winch
in other posts, but they are very expensive (by comparison). If I get
in trouble with the cheap Chinese servo though it should not be too
dificult to change it later.
Lastly, I do like your use of copper tubes to route the various
cords about. I was concerned about the wear that would probably occur
over eyelets and the like. I am not that convinced about split pins
either. Some careful rounding off will be needed I think.
I notice that you have used a very substantial linkage to drive the
rudder. Did you have problems with just a wire link, or was it belt
and braces thinking beforehand?
Tony Jaques
 
Posts: 13
Joined: December 15th, 2014, 4:43 am

Re: Alternative hatch cover fixing?

Postby m-o-t- » April 4th, 2016, 6:44 pm

Sound like you have worked out your servo setup.... :D

Have to agree the tape is not a good look.... :(
If I could have a clear hatch cover that clipped on and was water tight...that the holy grail
The sail winches I used are fairly cheap these days. I used a servo in a smaller boat and went through 2 servos pretty quickly....
I have changed the switch to a through deck one so that on is done with a push of a button, off is by lifting a pin. I do not have to open a hatch any more for power :D , only to charge the battery.
The tin copper tube works very well and there is no wearing on the lines
I have had no problems with line and split pins but have had some pull loose of their mount,,, more my fault with the cleaning before the gluing...
The rudder was a result of what was on hand at the time, but I've have never had a problem to date... :roll:

MOT
Maker Of Things
User avatar
m-o-t-
 
Posts: 84
Joined: May 27th, 2014, 5:58 pm
Location: blue mountain sydney

Re: Alternative hatch cover fixing?

Postby exrhodie » April 8th, 2016, 7:26 am

I must confess that I tried many things including magnets of the rare earth variety. My favourite, while not very aesthetically pleasing is masking tape. Waterproof, easy to put on and remove, and very cost effective. I wanted my yacht to look beautiful but after returning home time after time with a soaking hull I resorted to this method. Everything is now warm and dry.
User avatar
exrhodie
 
Posts: 32
Joined: October 28th, 2012, 11:48 pm
Location: Watford, England


Return to Racing Sparrow Model Yachts Topics



Who is online

Users browsing this forum: No registered users and 0 guests

cron
suspicion-preferred