[PSUBS-MAILIST] New Asset - Zodiac Cadet 390 Tender

Tue Oct 26 22:21:49 EDT 2021

This is turning into a really thought-provoking thread! Thanks for all the
helpful suggestions, ideas, links (Alec), etc.

Perhaps it is worth considering a smaller engine (either sticking with the
9.9 or maybe getting a 15). One problem is that I don't have a specific
mission in mind so much as a desire for the most useful platform possible
while still maintaining a high degree of convenience and portability.

Those who attended the 2013 convention in Islamorada will remember my dad
building a tow post in the Boston Whaler to aid in pulling Snoopy out onto
the ocean side. It seemed to work alright but the concept could
definitely stand some refinement. I might try to develop a similar tow post
that would mount in the Zodiac to aid in control while towing (it would
likely be stayed from the bow and amidships. As Hank mentions, perhaps
'pushing' is an inflatable's natural calling. Sean makes a good point with
prop choice as well. All great considerations... a lot to think about. ~
Doug

On Tue, Oct 26, 2021 at 10:02 PM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> K600 was 3.4hp.  MK101's are 1.9hp.   We have a formula on website, its
> just amps x voltage / 746
>
> PSUBS.ORG <http://www.psubs.org/design/calcs/hp.html>
>
> PSUBS.ORG
>
> <http://www.psubs.org/design/calcs/hp.html>
>
>
>
>
>
> On Tuesday, October 26, 2021, 08:13:55 PM EDT, Alec Smyth via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> A K350 stern thruster is how many HP? Not sure, but you can probably count
> them on one hand. Yet they move along quite well, I think at 3 knots. I
> don’t think I’ve ever got past 4 knots no matter how big the tow boat! The
> sub just misbehaves in every way beyond that. Of course, it’s very
> different for streamlined subs like the Nektons.
>
>
>
> On Oct 26, 2021, at 8:01 PM, Sean T. Stevenson via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> The other option is the alongside tow, where as Hank pointed out the
> intent is to actually create a composite unit, with the tow vessel secured
> alongside but as far aft as possible againt the towed vessel, with lines
> secured to points at the fore and aft extents on the towed vessel, plus
> laterally to make the tow rigging effectively rigid. The tow vessel then
> just acts as a propulsor of the composite. This works well when the tow
> vessel is small compared to the towed, and has the added advantage of being
> able to maneouver the composite as though it were a single large vessel,
> with steerage and reversing, etc.
>
> Sean
>
> -------- Original Message --------
> On Oct. 26, 2021, 17:49, Sean T. Stevenson via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> Depends... How patient are you? ;-)
>
> Provided you have a long enough tow line that your discharge thrust isn't
> working against you, it will move, but you're not going anywhere fast with
> 9.9 hp. I have towed partially submerged sailboats with 90 hp in the past
> and still not moved faster than I could swim. Consider the 9.9 an emergency
> shepherding option.
>
> Sean
>
> -------- Original Message --------
> On Oct. 26, 2021, 17:25, Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> Have to admit I'm a bit out-of-the-loop regarding boats and towing, but
> curiosity is getting the best of me, how capable is a lightweight
> inflatable of towing a 3-5k pound sub through the water?
>
> Jon
>
>
> On Tuesday, October 26, 2021, 04:53:01 PM EDT, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Just a quick reminder that while total available power of an outboard is
> an important consideration, for towing purposes one should also consider
> the suitability of the installed propellor. Out of the crate, most small
> outboards come equipped with a screw optimized for top speed (3 blade,
> highly cupped, highly raked, aggressive pitch), where, for example, a
> 5-bladed prop with lower pitch wouldn't have the same speed capability on
> plane but would be much better suited to towing. Could potentially be an
> easy change to make / procure.
>
> Sean
>
>
> -------- Original Message --------
> On Oct. 26, 2021, 14:26, Tim Novak via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> This is unfortunate news, Doug. At least your 9.9 is available in the
> meantime.
>
> Best of luck.
>
> Tim
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *Douglas Suhr via
> Personal_Submersibles
> *Sent:* Monday, October 25, 2021 8:10 PM
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Subject:* Re: [PSUBS-MAILIST] New Asset - Zodiac Cadet 390 Tender
>
>
>
> Well friends, it would seem that perhaps I spoke too soon when I
> offered the services of the new Zodiac at next year's event in Michigan.
> The boat itself is actually inbound this week via truck freight. It had no
> delays at port because coming in from Europe, it entered the country on the
> Atlantic side and avoided the major snafu currently plaguing our Pacific
> coast ports. But I've run into a snag with the motor... Major ordering
> backlogs with almost all new outboards! I had my sights set on a Yamaha
> 25-hp short shaft, tiller-operated outboard due to the high-efficiency
> motor and great power:weight ratio but it looks like if I order one right
> now, it'll be a 6 to 9 month lead-time due to major supply chain
> disruptions. I'll be meeting with my local Yamaha dealer tomorrow to
> discuss options but at this point it looks like I have two viable routes:
> order now and wait -or- look for a decent used engine for sale. I do have a
> 9.9-hp outboard that I could use in the interim if I decide to order a new
> motor and wait it out, but for the purpose of towing subs I think a 25-hp
> is necessary. I'll keep you all apprised of progress with the new boat, but
> wow I am disappointed that so many different things I used to take for
> granted (that you could just go out and buy) are getting very difficult to
> find. Not good. ~ Doug S.
>
>
>
> On Fri, Oct 22, 2021 at 8:52 PM Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Definitely.  I can put slides up on the website.  I've got Steve's and
> Cliff's.
>
>
>
>
>
>
>
> On Friday, October 22, 2021, 08:44:48 PM EDT, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
>
>
>
> Thanks Jon, After reading posts from all the others over the years, I
> think it adds a lot to see them on the screen.
>
> Maybe next year?
>
>
>
> Rick
>
>
>
> On Fri, Oct 22, 2021 at 1:55 PM Tim Novak via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Most of the Zoom meetings that I have attended and there are more than 10
> others on camera it causes a significant increase in bandwidth usage.  This
> causes the speaker's video to lag and become jerky.
>
>
>
> Agreed that it is a better meeting when everyone is on video, but muted in
> order to avoid distracting background noises.
>
>
>
> This was a terrific session, very close to being there together.  But
> unfortunate that we could not all participate with lunch and dinner and off
> line discussions.  Unfortunately, I missed the first hour.  I was able to
> take screen photos of various slides for further study.
>
>
>
> Looking forward the next one, in person or online!
>
>
>
> Tim
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *Jon Wallace via
> Personal_Submersibles
> *Sent:* Friday, October 22, 2021 3:59 PM
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Subject:* Re: [PSUBS-MAILIST] New Asset - Zodiac Cadet 390 Tender
>
>
>
> Rick, totally up to each person if they want to be on video or not.  A lot
> of our members are still working for a living so difficult for them to hook
> up on a weekday but unfortunately a weekday was all I could book for a
> meeting room.
>
>
>
> I did not record any of the material.  Steve suggested it to me but my
> hands were full just trying to keep the audio going.  That might be
> possible in future if we can find a zoom-master to run the online meeting.
>
>
>
> Jon
>
>
>
>
>
> On Friday, October 22, 2021, 01:45:28 PM EDT, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
>
>
>
> Hi Jon, I tuned in towards the end of the event as I am 6 hours away but
> it was great to be able to use the zoom format for the first time due to
> those who would like to be there but couldnt' for some reason.
>
> Do you have a list of who was able to show up via Zoom? I didn't see some
> of the regulars like Hank, Sean, Vance as well as some of the others. I
> hope that we can start doing that every year. When I was on, there were
> about 6 others that were on as well but no one had their cameras turned on
> so I didn't either. Was there a reason as it would be nice to see everyone
> as well.
>
> Rick
>
>
>
>
>
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