You guys aren't right in the head. Jazz On Feb 8, 2016 7:09 PM, "Keith R. Martin" <keith.richard.martin@gmail.com> wrote:
Electrical actually, but with my fair share of mechanical stuff throughout my career...
*Keith R. Martin, P.Eng.*
*Burnaby, B.C. CanadaSerenity,** M17 Hull #353*
On 8 February 2016 at 19:05, John Tyner <tynerjr@md.metrocast.net> wrote:
3x? Must be a civil, and not an aerospace, engineer! :-) ----- John Tyner M-15 # 412 "Chimpanzee"
On 2/8/2016 9:53 PM, Keith R. Martin wrote:
Hi John,
I chose stainless to get the desired strength in a given std dimension and wall thickness from metal supermarkets. This helped with one of the key "features" I wanted which was the ability a 5 inch "floating span" to move my spinnaker sheave forward by 4-5 inches to provide clearance for my top down furler.
To be fair I found a thicker aluminium stock that probably would have done the trick except for the fact that I couldn't get it to pass the std 3x design hurdle all us engineers are so fond of :)
In the end the the final unit is not very heavy ..
Keith
*Keith R. Martin, P.Eng.*
*Burnaby, B.C. CanadaSerenity,** M17 Hull #353*
On 8 February 2016 at 14:38, John Schinnerer <john@eco-living.net> wrote:
Keith,
Is there a reason you used stainless instead of aluminum? Any reason to not consider aluminum stock for something like this as well?
thanks, John S.
On 02/08/2016 08:20 AM, Keith R. Martin wrote:
Thanks Connie, I am quite happy with how it turned out..
Keith
Keith R. Martin, P.Eng. Burnaby, BC, Canada Serenity M17, Hull #353 On Feb 7, 2016 5:56 AM, "Conbert Benneck" <chbenneck@gmail.com>
wrote:
On 2/6/2016 4:50 PM, Keith R. Martin wrote:
Keith,
Congratulations. That's an elegant solution to the problem. You
have
all the benefits of nav lights, VHF antenna, and your sheave in one neat, easily removable package.
Connie
John brings up a good point about having "stuff" on the top of a trailer
> sailor mast... > > I too was worried about that when trailering the boat but I was > reluctant > to trade off the visibility provided by mast mounted lighting ... > > However when combined with my other "wants", including a mast mounted > VHF > antenna in support of my penchant for sailing "off the beaten track", > and > 4-5 inches of forward separation between my furling jib & spinnaker > sheave > used by my top down asym furler, my solution was to fab up a removable > mast > head assembly that could be easily removed when trailering. > > Attached is a picture of my mast head cap. > > Constructed out of standard square stainless tubing and a small peace > of > teak, it provides a mounting arrangement for the tri-colour, all round > white, VHF antenna , windex, and extended spinnaker sheave... > It slides firmly over top of the existing bare masthead, has a flat 4 > power > connector for the lights and the standard stainless RF connector of > the > antenna, it is secured with two 1/4" stainless rigging pins... > > It takes just a couple of minutes to install or remove... > > > Keith > > > *Keith R. Martin, P.Eng.* > > *Burnaby, B.C. CanadaSerenity,** M17 Hull #353* > > > > On 6 February 2016 at 13:44, John Schinnerer <john@eco-living.net> > wrote: > > Yeah, I have the normal deck nav lights - split green/red bow, white > > stern. So I am covered when under sail at night. >> >> But if I want to motor at night I also need either a forward facing >> 225 >> deg. white light ("steaming" light) plus stern light, or, an >> all-around >> white light. >> For anchoring, also an all-around white light. >> >> So I'm thinking the all-around white covers both anchor and steaming. >> But >> yeah, I'd rather not add fragile stuff to the top of the mast on a >> trailer >> sailor. And wiring in the mast. >> >> But neither anchor nor steaming light needs to be on top of mast. >> Just >> needs to be visible 360 degrees, and there's something about the >> steaming >> light is supposed to be a meter or more above the green/red lights. >> So >> a >> clamp-on LED 360 deg. light would probably cover it. >> >> Agree about the night sailing...it is an awesome experience. Most >> I've >> done of it was in Hilo bay on a Corsair 31 tri. Nothing like >> whooshing >> along at low-heel multihull speeds in the tropical moonlight! >> Many many years ago, got to do a night passage in the archipelago >> around >> Stockholm, Sweden. In a pre-WWII classic wooden "archipelago cruiser" >> sailboat, no less. It's quite the navigation experience, sailing >> those >> channels in the dark, setting course via multiple lights' visible >> angles, >> colors, and frequencies. >> >> cheers, >> John S. >> >> On 02/05/2016 07:40 PM, Thomas Buzzi wrote: >> >> John, >> >> I had considered the all around white light combined with the 135 >>> stern >>> light plus the red and green but it added almost a foot to the top >>> of >>> the >>> mast plus I already had the wiring roughed in for the deck nav. >>> lights >>> from >>> the factory so I went that way. You are correct and I am glad the >>> stern >>> light is only 135degrees. Less chance of light bleed into the >>> cockpit >>> at >>> night.I plan to do night sailing as I have done with all my boats. >>> Nothing >>> like being out there for a full moon and watch it rise above the >>> waves. >>> Not >>> to mention the phosphorescence you can stir up with your wake. >>> Really >>> beautiful time to go out. No hot sun either. >>> fair winds, >>> Tom B >>> <https://www.avast.com/sig-email> This email has been sent from a >>> virus-free computer protected by Avast. >>> www.avast.com <https://www.avast.com/sig-email> >>> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>> >>> On Fri, Feb 5, 2016 at 7:12 PM, John Schinnerer < >>> john@eco-living.net> >>> wrote: >>> >>> The dome-top perko stern lights look at a glance like they are 180 >>> >>> degrees, but I'm pretty sure they are 135, the specified visible >>> angle >>> >>>> for >>>> a stern light per USCG rules. Mine is something less than 180 >>>> anyhow. I >>>> can >>>> tell just by looking at the arc vs. the whole circle, plus if I >>>> sight >>>> across the edges of the vertical opening, the bulb is nearly or >>>> completely >>>> hidden. If it were 180 I would see half the bulb. >>>> >>>> Given the mounting location (on slope of coaming at rear of >>>> cockpit) >>>> and >>>> 135 degree visible angle, the cockpit (certainly the forward 3/4 of >>>> it) >>>> would be shielded from the bulb due to location and angle, I >>>> think...I'll >>>> check when I get a battery in her. >>>> >>>> Kevin's configuration is nifty and legal...but more wiring in the >>>> mast. >>>> I'm wanting to avoid having to bother wiring inside the mast and >>>> through >>>> the deck. But if I'm ever going to motor at night "legally," I will >>>> need >>>> to >>>> - for all-around white, or, 225 degree "steaming" light. Or, have >>>> an >>>> all-around white light mounted down low where it will mess with >>>> night >>>> vision. >>>> >>>> The all-around white would do for both under power and anchor >>>> light, >>>> so >>>> I'm leaning towards that.. >>>> >>>> cheers, >>>> John S. >>>> >>>> On 02/05/2016 01:51 PM, Thomas Buzzi wrote: >>>> >>>> Good idea. I am concerned about using that 180 point stern light >>>> and >>>> >>>> preserving night vision. The newer montys have the stern light >>>> flush >>>> >>>>> mounted on the transom so no light finds its way across the >>>>> cockpit. >>>>> <https://www.avast.com/sig-email> This email has been sent from a >>>>> virus-free computer protected by Avast. >>>>> www.avast.com <https://www.avast.com/sig-email> >>>>> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>>>> >>>>> On Fri, Feb 5, 2016 at 2:45 PM, Keith R. Martin < >>>>> keith.richard.martin@gmail.com> wrote: >>>>> >>>>> Interesting discussion on stern lights..... >>>>> >>>>> In my case I chose to have a mast mounted tri-colour and an all >>>>> round >>>>> >>>>> white, as well as side mounted nav lights on each side of the Bow. >>>>>> >>>>>> So when sailing just the typical tri-colour up top, but when >>>>>> under >>>>>> power >>>>>> my >>>>>> lights are configured with the all white up top and the side >>>>>> mounted >>>>>> nav >>>>>> lights lit up, allowing me to avoid placement of an actual stern >>>>>> light >>>>>> at >>>>>> cockpit level. >>>>>> >>>>>> Is anyone else using this configuration?? >>>>>> >>>>>> >>>>>> >>>>>> *Keith R. Martin, P.Eng.* >>>>>> >>>>>> *Burnaby, B.C. CanadaSerenity,** M17 Hull #353* >>>>>> >>>>>> >>>>>> >>>>>> On 4 February 2016 at 19:41, John Schinnerer < >>>>>> john@eco-living.net> >>>>>> wrote: >>>>>> >>>>>> On 02/04/2016 09:09 AM, Thomas Buzzi wrote: >>>>>> >>>>>> ... Also very handy for dealing with the aft running lite or when >>>>>> >>>>>> adding wiring for an auto helm. >>>>>>> >>>>>>> >>>>>>>> Speaking of stern light - my M17 has the standard Perko dome >>>>>>>> style >>>>>>>> >>>>>>>> light >>>>>>>> >>>>>>> installed on the downward slope of the port side coaming where >>>>>>> it >>>>>>> drops >>>>>>> down to the transom. >>>>>>> But it was just mounted flat on the slope, meaning it's tilted >>>>>>> quite >>>>>>> steeply. The solid part of the dome blocks a lot of the light >>>>>>> astern >>>>>>> (problematic, for a stern light!). >>>>>>> >>>>>>> Some of the pictures shared recently about other things (like >>>>>>> rudders) >>>>>>> included a view of same light in same place, but with a nice >>>>>>> wood >>>>>>> wedge >>>>>>> under the light so it sits level with respect to the horizon. >>>>>>> >>>>>>> For those who have something like that for their stern light - >>>>>>> was >>>>>>> it >>>>>>> something you bought, or did you make it or have it made, >>>>>>> one-off? >>>>>>> >>>>>>> I want to level my light in same way so wondering if there's >>>>>>> something >>>>>>> ready-made or I'll need to make it. >>>>>>> >>>>>>> thanks, >>>>>>> John S. >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> John Schinnerer - M.A., Whole Systems Design >>>>>>> -------------------------------------------- >>>>>>> - Eco-Living - >>>>>>> Whole Systems Design Services >>>>>>> People - Place - Learning - Integration >>>>>>> john@eco-living.net - 510.982.1334 >>>>>>> http://eco-living.net >>>>>>> http://sociocracyconsulting.com >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> >>>>>>> John Schinnerer - M.A., Whole Systems Design >>>>>> >>>>> -------------------------------------------- >>>> - Eco-Living - >>>> Whole Systems Design Services >>>> People - Place - Learning - Integration >>>> john@eco-living.net - 510.982.1334 >>>> http://eco-living.net >>>> http://sociocracyconsulting.com >>>> >>>> >>>> >>>> -- >>>> >>>> John Schinnerer - M.A., Whole Systems Design >>> >> -------------------------------------------- >> - Eco-Living - >> Whole Systems Design Services >> People - Place - Learning - Integration >> john@eco-living.net - 510.982.1334 >> http://eco-living.net >> http://sociocracyconsulting.com >> >> >> >> >> -- John Schinnerer - M.A., Whole Systems Design
- Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com