<div dir="auto">Alan, you just reminded me about a company called McNicols. I had bought floor grating from them in the past. They have a huge selection. <div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 5, 2020, 10:48 PM Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div></div><div>David,</div><div>What about a plastic grate!</div><div>I have seen a few of those around on submarine thrusters. ( well they look plastic)</div><div>Alan </div><div><br>On 6/07/2020, at 5:25 PM, David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="auto"><div dir="auto"></div>Hi guys, i completed the placement on my vertical thruster. Tomorrow I will need sending to the cnc to cut the support arm for each of the 4 horizontal thrusters. Turns out the thruster just peaks out the bottom. My temporary grill is a bbq grate. If it was only stainless steel.<div dir="auto">David.<br><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Sat, Jul 4, 2020, 11:56 PM David Colombo <<a href="mailto:seaquestor@gmail.com" rel="noreferrer noreferrer" target="_blank">seaquestor@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Hi Alan, Im thinking the same thing. The collar should be 2-3 long below the flush grill with the top of the wing. Aesthetically I think the flush grill will look better. <div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jul 4, 2020, 1:33 PM Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div></div><div>David,</div><div>I would put it down lower so you have more propeller in the collar area</div><div>to get a bit of the kort nozzle effect & for visual streamlined look as it will</div><div>protrude more with a proppeller guard on it.</div><div>You will get some power loss with the wash hitting the sides of the horizontal</div><div>Tunnel, but maybe you could make the uncut hole much larger to eliminate</div><div>a bit of that effect.</div><div>Alan</div><div><br>On 5/07/2020, at 7:55 AM, David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="auto">Hi Alec, the 12" hole will be in the bottom as well. I just hadn't cut it out yet. I'm thinking that that the prop will sit just below the grill which will be flush with the surface. Even with that placement the nose of the thruster may just peek out the bottom just a bit, so entanglement issues.<div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jul 4, 2020, 12:00 PM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Dave,<div><br></div><div>Looking good! Surely there is a 11" diameter hole coming in the bottom of that tunnel? You wouldn't want to draw water in horizontally and expel it vertically - you'd want it to come in directly from the bottom and go out the top. And once you had that hole, the thruster maybe could also go a little lower, so that the prop was just below grade on the top skin. But the latter suggestion seems to me much less important than the first.</div><div><br></div><div>Best,</div><div>Alec</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jul 4, 2020 at 1:47 PM David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto">Ok guys, looking for comments on potential issues with vertical thrusters. This morning I laid in the first vert thruster in the wing to mock up the attaching bracket to the hull. The twelve inch hole will go thru the wing. The questions are:</div><div dir="auto">1) hold the prop flush with top surface or raised slightly. I will be fabbing a grill cover.</div><div dir="auto">2) as the prop can draw water from the bottom as well as thru the thruster tube, any concerns with prop wash being pushed out more laterally vs vertically. Wondering if i need to have a collar at least as deep as the prop?</div><div dir="auto"> You might be also wondering why I have 101 lb vertical thrusters. Never know when you might need to do a barrel roll maneuver.</div><div dir="auto">I appreciate the feedback</div><div dir="auto">David</div></div>
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