Hi,

I've been flying model airplanes and helicopters, and this is my first post on this site. Have been considering trying out submarines and have been gathering information on its various systems and what makes them work. I have a question regarding submarine propellers. Which off-the-shelf propellers would be suitable for driving a 12kg submarine at about 3 knots underwater?

Thanks in advance

HI,
To get an answer it wheel require more information about what tip of submarine you have or want to get,in order to know what tip of propeller is necessary.Most of the submarine have the awn model of propeller so is difficult to know witch tip is suitable for you.
Regards "bijou"

Chanki.

<span id="result_box" lang="en" c="4" a="undefined" closure_uid_fxcy0z="175"><span class="hps" closure_uid_fxcy0z="11948">Are many</span> <span class="hps" closure_uid_fxcy0z="11949">variants,</span> <span class="hps" closure_uid_fxcy0z="11950">to determine</span> <span class="hps" closure_uid_fxcy0z="11951">the speed</span> <span class="hps" closure_uid_fxcy0z="11952">of the vessel</span><span closure_uid_fxcy0z="11953">, you enter your</span> <span class="hps" closure_uid_fxcy0z="11954">weight,</span> <span class="hps" closure_uid_fxcy0z="11955">but you have to</span> <span class="hps" closure_uid_fxcy0z="11956">see the</span> <span class="hps" closure_uid_fxcy0z="11957">drag,</span> <span class="hps" closure_uid_fxcy0z="11958">the type of</span> <span class="hps" closure_uid_fxcy0z="11959">submarine that</span> <span class="hps" closure_uid_fxcy0z="11960">will build</span><span closure_uid_fxcy0z="11961">, as well as</span> <span class="hps" closure_uid_fxcy0z="11962">the engine that</span> <span class="hps" closure_uid_fxcy0z="11963">will use</span><span closure_uid_fxcy0z="11964">, what</span> <span class="hps" closure_uid_fxcy0z="11965">reduction.</span> <span class="hps" closure_uid_fxcy0z="11966">See</span> <span class="hps" closure_uid_fxcy0z="11967">this site</span> <span class="hps" closure_uid_fxcy0z="11968">has all</span> <span class="hps" closure_uid_fxcy0z="11969">possible</span> <span class="hps" closure_uid_fxcy0z="11970">helices</span> <span class="hps" closure_uid_fxcy0z="11971">for use</span> <span class="hps" closure_uid_fxcy0z="11972">in</span> <span class="hps" closure_uid_fxcy0z="11973">various</span> <span class="hps" closure_uid_fxcy0z="11974">modalities.</span> <span class="hps" closure_uid_fxcy0z="11975">But</span> <span class="hps" closure_uid_fxcy0z="11976">roughly speaking,</span> <span class="hps" closure_uid_fxcy0z="11977">you should use a</span> <span class="hps" closure_uid_fxcy0z="11978">gearbox</span> <span class="hps" closure_uid_fxcy0z="11979">of 3:</span> <span class="hps" closure_uid_fxcy0z="11980">1</span> <span class="hps" closure_uid_fxcy0z="11981">for most</span> <span class="hps" closure_uid_fxcy0z="11982">motors used in</span> <span class="hps" closure_uid_fxcy0z="11983">submarine,</span> <span class="hps" closure_uid_fxcy0z="11984">I myself</span> <span class="hps" closure_uid_fxcy0z="11985">am building</span> <span class="hps" closure_uid_fxcy0z="11986">one</span> <span class="hps" closure_uid_fxcy0z="11987">from scratch,</span> <span class="hps" closure_uid_fxcy0z="11988">and not yet</span> <span class="hps" closure_uid_fxcy0z="11989">determined</span><span closure_uid_fxcy0z="11990">, engine,</span> <span class="hps" closure_uid_fxcy0z="11991">propeller and</span> <span class="hps" closure_uid_fxcy0z="11992">heixo</span><span closure_uid_fxcy0z="11993">.</span><br closure_uid_fxcy0z="11997" /><br closure_uid_fxcy0z="11998" /><span class="hps" closure_uid_fxcy0z="11994">http://www.raboesch.com/</span><br closure_uid_fxcy0z="11999" /><br closure_uid_fxcy0z="12000" /><span class="hps" closure_uid_fxcy0z="11995">hug</span></span>

Check a company Alexanderengle. I built their u177 they produce the best kits.