<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div><div><br></div></div><div><br></div><div>Alec,</div><div>Yes it may be to scary, I will give it more thought. I need more range, and my boat will not be ready for the spring of 2018. It is bad enough I missed this season ;-( I need a working submarine with reliable range and batteries will not do it. </div><div>The danger is gas vapour reaching an explosive level. That would mean a leak and no proper venting coupled with an ignition source. Both these risks can be managed. Diesel fuel in a hot enclosed environment is not as volatile but still not without risk. In all fairness, you can't compare early antique engines with a modern-day Honda. My options are limited with an 18 inch opening. </div><div>Hank</div><div><br></div><div><br></div><div id="yahoo_quoted_3968374000" class="yahoo_quoted"><div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;"><div>On Sunday, August 20, 2017, 4:21:51 PM MDT, Alec Smyth via Personal_Submersibles <personal_submersibles@psubs.org> wrote:</div><div><br></div><div><br></div><div><div id="yiv4365325988"><html><div><div dir="ltr">Sorry to be critical, but yes, from an historical perspective a gas engine would be a big no-no as gas powered subs were death traps prior to the adoption of diesel. I always say my subs are at their most dangerous in the shop, not in the water. This could be a situation where the drained gas engine is not dangerous underwater but is dangerous during surface transit. And frankly storing the gas outboard sounds like a bit of a challenge in itself. I applaud original solutions, but this isn't one that sounds like a good idea, at least to me.<div><br clear="none"></div><div>Gamma seems to have pretty good range on batteries, and I recall you're planning on the trailerable landing craft. Would the landing craft not obviate the need for an onboard ICE?</div><div><div><br clear="none"><div><br clear="none"></div><div>Cheers,</div><div><br clear="none">Alec</div></div></div></div><div class="yiv4365325988gmail_extra"><br clear="none"><div class="yiv4365325988gmail_quote">On Sun, Aug 20, 2017 at 7:50 AM, hank pronk via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv4365325988gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="yiv4365325988yqt8863383869" id="yiv4365325988yqt35763"><div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi All,</div><div>My diesel engine did not work out in the end, and 6 hp I suspect is a bit skinny. I do have a beautiful 15 hp 4 stroke Honda outboard that has been converted to run a hydraulic pump inboard. I converted it many years ago to power my sternwheeler but ended up with an antique engine. The engine is stripped down to a bare engine with external water pump and internal oil cooler. The problem is, it is a gas engine, and that is a big NO NO or is it? If the fuel supply is outside the hull and the engine is run out of fuel before a dive, then there is no fuel at all inside the sub while it dives. An engine compartment blower fan can constantly circulate air through a duct to the outside of the sub. I know as a rule it is considered a bad idea but with careful installation it could be a very nice drive system. This would be much quieter and smoother than a diesel engine. The Honda would be very easy to remove from the escape pod if I need to escape. The Honda 4 stroke is as reliable as even a Yanmar diesel. I was bragging to a Honda mechanic one time that the Honda starts with two pulls in the spring. He said it must need a tune up LOL it should start in one pull. </div><span class="yiv4365325988HOEnZb"><font color="#888888"></font></span><div>Hank</div></div></div></div><br clear="none">______________________________ _________________<br clear="none">
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