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| Delta Ditch Run at Stockton Sailing Club/Richmond Yacht Club | June 2 |
| Story |
| Norcalsailing report featuring Summer Palace:
http://www.norcalsailing.com/entries/2012/06/05/ditchrun2.html#.T-iWoI2Mfqs Below quoted from Pressure Drop: Drew Scott was helming a F-28. "My crew is starting to swing around to pick me up when El Raton, in perfect control slides up beside me and asks if I would like to get picked up. They had already doused their chute and stopped beside me. I took their offer and got back into a boat (trying to stop a lightweight trimaran next to someone when it is blowing in the mid-20s is not easy so I figured I would not turn down El Raton. My crew ably finished the race on Papillon, only one boat behind El Raton! And I had many adventures with El Raton, but that is their story to tell. So, a great big thank you to the Ray Lotto and the crew of El Raton for pulling my soggy hide out of Suisun Bay!! Drew Scott Papillon (most of the time)" |
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| Author: dan mcgraw ([email protected]) contact the author Subject: Looking for battery/electrical ideas Info: (20033 views) Posted: Wednesday 3-6-13 07:21:45 AM |
For bouy racing, all I need is ability charge my TackTick stuff, and emergency lighting. My LED nav lights draw about 250 mah total, so I'm just going to do 8 x AA batteries in a case in tupperware and replace them a couple times a year. This will plug in where the "offshore/cruising" battery does. The batteries will (eventually) be mounted in the bilge if I can make it work.
For offshore work, I've calculated that given a 24 hour period in "race mode", I will consume ~32.5 amps if I'm monitoring VHF continually, and 17.8 amps if I am not. We plan to monitor VHF on handhelds when the rules allow.
Given a 20% "discharge floor" for lead acid batteries, that means I need ~21.3 amps for a 24 hour race, so I plan to buy a simple 20 amp sealed lead acid battery (scooter battery sorta thing) that weights 14 lbs.
My calculations included assumptions for use of:
VHF at idle, VHF at receive (5% of time), VHF transmitting (5 min over 24 hours), TackTick trickle, Nav lights (50% run time), Interior LEDs (8% run time), Charging a smart phone 1.5 times every 24 hours, Charging a GoPro once every 24 hours, Running a Garmin handheld GPS continually
I feel there is some margin in these numbers, the real need is probably more like 12-15 amps.
For longer races, obviously we will need a bigger battery or a way to augment.
I'd be happy to share my calculations with anyone who is interested.
-dan
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