Tag Archives: water

Inside the Receiver Pot of a Champion ….!!

You may have read that the Marblehead Rankings at Datchet last weekend had a few wilder moments weather-wise. My goodness, Nigel B had his share of issue management on the Sunday !!

For Nigel, it turned out to be damp in the receiver pot. I shall shortly put a “Beginner’s Guide” article on the website about how Nigel went about diagnosing this particular type of “lost radio contact with the boat” occasion. It was really quick and only one race was lost – very impressive!

Before I do that, I thought you might like to see Nigel’s highly ordered approach to the interior of the radio pot itself.

If you take a look at the photo above, note:-

  • Both battery and receiver attached to the upper side of the pot with velcro to keep them away from washing moisture in the bilge. The receiver sockets are uppermost as far away from trouble as you’d expect to get. Can you see that both battery and receiver are about as close to the lid as possible?
  • Vapex LIFE battery I believe, which last time I looked means the XT30 connector is a special order item!
  • Relaxed approach to antenna management – ha !! Looks neat though.

Nigel has two great additional tips:-

1/ Fit a breather pipe so that plunging a “warm” hull into cold water doesn’t suck in water through some weeny hole as it cools. GH says it can also help the hull to stop pumping the air pressure through waves. Try flexing the sides of a modern Marblehead and you’ll see what he means. The general idea of both members is that this is a great way of keeping the hull dry inside. By the way, I noted at the weekend that around half the fleet had breather pipes fitted. Many had a special little Sails-etc breather post (very smart looking sort of shark fin thing !), but on Henning Faas (spectacular) new Niou Niou it was a simple pipe buried in the deck patch. This approach is also favoured by PH and k7yachts here at Datchet.

2/ The standard pot comes with a thin plastic shim which sadly does not prevent water ingress. NB says that Tony Edwards had recommended getting a sheet of 2mm foam off amazon and putting that inside the pot lid as a seal. Highly recommended as a near to perfect closure. You can see it in the photo above.

3/ I must say too that it can be a good idea to keep a little vaseline in the tool box to smear around the pot lid thread for water proofing.

Drying Out the Inside of Your Boat After Sailing

After a pretty wet day’s sailing, I pulled the bung off the F6 Marblehead and let the water out, as you do. This prompted a couple of discussions with Clubmates, LT and GH. It seems that when they get home, they pump dry air through their boats to keep the electrics dry. Good thinking.

As an aside, my IOM has a massive wide pot aperture, so I thinking airing the hull and electric is less of an issue with that. You can almost put your hand in, it’s that big. If you have a 60mm pot in your IOM, you might think about this though.

We had a great discussion in the bar about whether it is best to push dry air in, or pull damp air out. I decided on the latter for me.

Prompted by LH, I ordered the bits from Amazon : 40mm USB powered computer fan with 3 speed switch, a hygrometer to measure progress, (total less than £20 I think) and for my spare room, a 2m USB extension cable. The pot in the F6 is the ubiquitous Sailsetc 60mm pot, so I ordered an extra pot and lid for £2.50 plus postage. Although you can get a pot lid separately and save £1, I reckon you need the whole thing so that when you drill a hole in the lid to suck the air out, you can hold the whole affair by the pot as you drill.

This is what it looks like with the fan in situ. Note I have glued it on the lid for now, but I suspect in the longer term I’ll bolt it on using M3 bolts. There is a 3 speed switch on the fan and in initial tests I ran it on the lower speed. You need the bung out obviously so that dry air gets in to displace the damp air coming out. The hole in the lid exactly matches the fan diameter.

LT also suggested a hygrometer to place in the airflow to monitor progress. Amazingly it costs about the same as London coffee.

This is what it looks like, when it’s running. Fingers crossed it works fine.

This was the fan we used from amazon:-

ELUTENG Mini 40mm 5V USB Fan Desk PC Fans with L/M/H 3 Adjustable Speed Portable USB Computer Fan USB Case Box Electronic Cooling Fan 5300 RPM with Metal Grill for Laptop/TV Box/AV Cabinet/PS4/Router

This was the hygrometer:-

Goabroa Mini Hygrometer Thermometer Digital Indoor Humidity Gauge Monitor with Temperature Meter Sensor Fahrenheit (℉)