[PSUBS-MAILIST] Alec's new valves

Mon Oct 29 12:06:31 EDT 2018

Alec. I am looking forward to seeing video of you sinking, blink , gone.
Hank 

Sent from my iPhone

> On Oct 29, 2018, at 9:03 AM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> I'm with you Hank! The other thing is that with four valves this big, the sub shouldn't even have time to get out of trim when submerging. 
> 
> Alec
> 
>> On Mon, Oct 29, 2018 at 7:22 AM hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Alan,
>> I have to admit, that is pretty tempting.  I am torn between having a nice feature and my HATRED for electronics in a sub.  At Lake Tahoe, the only issues with Gamma  were ELECTRONIC, yes even Gamma with minimal electronics  had a failed potentiometer on the speed control.  Luckily, because I HATE and distrust all things electronic I carry a spare everything.  Are you not afraid if you make the sub so easy to operate that you take the joy out of diving it. 
>> Hank
>> 
>> On Sunday, October 28, 2018, 10:38:27 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Hank,
>> you'll really get excited over this! I have purchased a $10- arduino
>> compatible tilt sensor / accelerometer to control my ballast solenoids.
>> The idea is that to dive you flick one switch on the consul, this connects
>> to the arduino board & via relays opens the ballast solenoid valves.
>> If the sub starts to descend unevenly the arduino will read this from the 
>> tilt sensor & turn off the appropriate ballast valve untill the subs descent
>> becomes level. 
>> Probably a bit of fine tuning in the field required.
>> In the photo below I am only showing one relay as an example but will 
>> need to source relays based on my currently unknown power requirements.
>> That is basically it, apart from the wiring.
>> Cheers Alan
>> 
>> 
>>> On 29/10/2018, at 10:42 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>> 
>> Hank,
>> I would be interested in seeing them when they are finished.
>> Attached is one of my preliminary designs, but will probably
>> make the Aluminium housing a tight fit around the wires as 
>> a heat sink. Being vent valves they won't get water cooled till 
>> the ballast tanks are flooded.
>> Alan
>>  <image1.JPG>
>> 
>>> On 29/10/2018, at 10:14 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Alan,
>>> I am making solenoid vent valves and immersing the entire valve in oil with a compensation bladder.  I used them on my salvage ROV that did thousands of cycles without anything done to them.  I need two on Gamma and two on E3000
>>> Hank
>>> 
>>> On Sunday, October 28, 2018, 1:57:10 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> 
>>> Hank,
>>> I would need to put a seal on the plunger & as the plunger goes
>>> in & out it would be displacing oil, so have the same problems as with
>>> linear actuators. As the plunger has to be a material that can be
>>> magnetised it is vulnerable to corrosion, so I will have to coat it in
>>> resin anyway. It is just a matter of putting the plunger on the lathe
>>> & taking off enough metal to make room for the resin. 
>>> I made a solenoid valve years ago. It was 60W & got hot really fast.
>>> I have ordered a 48V & 24V solenoid mainly to see how hot they
>>> get, how strong they are, what gauge wire they are using & how many
>>> turns. If neither is suitable at least I will get some ideas for building one.
>>> I have been inspired by those little open waterproofed motors I bought.
>>> What were you going to use the solenoids for? If you want I will keep
>>> you up to date with what I am doing, but the solenoids will take about
>>> 2 weeks to get here.
>>> Alan
>>> 
>>> 
>>>> On 29/10/2018, at 8:29 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> Alan,
>>>> Why don't you just make a housing for the solenoids and oil fill.  That is one of my first projects when I get back to the sub.
>>>> Hank
>>>> 
>>>> On Sunday, October 28, 2018, 12:46:29 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> 
>>>> Hank,
>>>> yes just making fun of you! It's an old English saying! 
>>>> Thanks Alec, I see I have already "liked" them. Nice piece of work.
>>>> You guys got me inspired & I ordered a couple of solenoids to modify Vance's
>>>> mushroom valve design & make it electric. I will have to waterproof the solenoids,
>>>> which will involve machining the plunger so I can coat it & it's iron tube
>>>> receptacle with resin.
>>>> The force varies depending on how far out the plunger is & on one I
>>>> ordered it varied between 1 & 10kg; unfortunately I'll get a reduction in force
>>>> after coating everything with resin. I am not sure how much spring force I should 
>>>> need to close it yet.
>>>> Alan
>>>> 
>>>> 
>>>> 
>>>>  
>>>> 
>>>>> On 29/10/2018, at 6:49 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>> 
>>>>> Have you guys never heard the saying "on pins and needles"  or are you just making fun of me 
>>>>> Hank
>>>>> 
>>>>> On Sunday, October 28, 2018, 8:33:01 AM MDT, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>> 
>>>>> 
>>>>> Yeah, I'm not sure what Hank was talking about concerning piss and needles, it doesn't sound good at all. But Alan, scroll down on this page and you'll see the valves...
>>>>> 
>>>>> https://www.facebook.com/pg/INNERSPACESCIENCE/posts/
>>>>> 
>>>>> 
>>>>> On Sat, Oct 27, 2018 at 10:29 PM Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>> Hank,
>>>>> glad you clarified that, it read like you were an alcoholic & junky.
>>>>> What valves were they? I haven't received any posts lately &
>>>>> were wondering if I had missed some.
>>>>> Alan 
>>>>>  
>>>>> 
>>>>>> On 28/10/2018, at 1:20 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>>> 
>>>>>> Pins
>>>>>> 
>>>>>> 
>>>>>> On Saturday, October 27, 2018, 6:19:32 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>>> 
>>>>>> 
>>>>>> Alec,
>>>>>> I am on pis and needles waiting to hear about your new valves and how they perform.  Have you tested them?
>>>>>> Hank
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