100 HP or 130 HP for single diving?

[Blackwood]

I heard that Mike!

Though I'm not entirely certain why he'd want to brag about his SAC rate increasing...

 

[mikeguerrero]

Though I'm not entirely certain why he'd want to brag about his SAC rate increasing...

Typo, I corrected it in my edit but Kathy did a quote before correction... I was not thinking DIR and maybe DIW when I first posted...

Lynn,

Thanks for the link, I own Worthington 100 hp and would be looking into the 130 hp Worthington as well.

Since the 100 hp starts me at -10 lbs full with valve, while a 130 hp starts me off at -11.7 lbs difference is -1.7 lbs, heavier in the beginning of dive, minimal...

At the end of the dive the 100 hp is -2.5 lbs and the 130 hp is -2 lbs negative, very small margin again... I'm .5 lb lighter at the end, looks like I'd be balanced, what do you think Lynn?

So in theory I shouldn't have to shed any weight off my belt, I currently use 6 lbs. When my instructor checked my weighting during Essentials at first he thought I was a little over weighted slightly, but at the end of the dive he checked me again and I was fine, so I opted to keep and dive the 8 lbs of lead on my belt.

Looks like I will have a very similiar config rig as yours Lynn...

 

[ae3753]

At the end of the dive the 100 hp is -2.5 lbs and the 130 hp is -2 lbs negative, very small margin again... I'm .5 lb lighter at the end, looks like I'd be balanced, what do you think Lynn?

Rainer, Rjack, and TSandM have been very helpful. But at this point, you'll want to get in the water and do a weight check.

 

[Guy Alcala]

Mike,

That is what I thought when I was on the phone with Halcyon. They did a configuration on my profile and told me the 40 lb wing is enough for diving exclusively the 100HP that I own doubled up.

They told me that if I wanted to do DECO diving with stages then I would require the 60 lb wing, remember they only make two in the Evolve sizes. There is nothing in between.

My essentials instructor also told me that 40 lb wing would be fine, so I have a good second opinion.



It's funny how what is said on a thread can come out wrong. The 100's are easy and fun to dive, I've never dove a 130 just carried them over for a fill, they are heavy on land and that is what I should have stated. I just wonder how they will feel on my back in comparison to the 100 hp.

I am not stating that I could not do it, it just came out that way... Sorry....

I have seen

Mike I dive HP100s and LP112s, which are a bit taller than the 130s. For your height you might consider the HP119. Even though it's only 1 lb. lighter empty than the 130, it is about 1.5" shorter IIRR, the same 24" as your Worthington 100s so may fit you better.

I think one of the reasons you don't see that many 130s locally had to do with MBDC, which charged double per fill for any tank over 120 cu. ft. So, there tend to be more HP119s and 120s around here, along with LP95s to 112s. I don't remember if any of the other shops in Monterey have similar price jumps.

Personally I won't dive my 112s from Monastery or any fairly rough entry, and preferably not from a boat. It's a lot more work than one of my 100s to climb a ladder or a steep beach, or get up from a knockdown. The 130s would be similar. Of course, doubles will be even worse.

Guy

 

[Blackwood]

Typo, I corrected it in my edit but Kathy did a quote before correction... I was not thinking DIR and maybe DIW when I first posted...

LOL. The Interweb remembers ALL

 

[mikeguerrero]

Rainer, Rjack, TSandM and Guy, all have been very supportive in answers to my questions. Like Don mentioned it's time to do a water test, Don do you own any 130's I could try?

At 5'5 I'm small and think maybe the 130's would be harder on boats etc due to the height. Guess is really sucks to be short like me.

Thanks,

MG

 

[kathydee]

Though I'm not entirely certain why he'd want to brag about his SAC rate increasing...

I knew what he meant.

Typo, I corrected it in my edit but Kathy did a quote before correction... I was not thinking DIR and maybe DIW when I first posted...

I could change my quote... but that's cutting Mike too much slack .

 

[Captain Bil]

Hi all,

I'm in the transition of diving doubles in the very near future, and I own a pair of 100 HP Worthington's. Love the tanks and haven't had any complaints.

However, with 160 logged dives I'm getting ready for doubles so my question is this.

Should I double up my 100's that I own, and purchase a pair of 130 HP for single diving?

The few times I got to dive with SoCal divers that came up to Pt Lobos, they recommend the 130 HP's in their waters, saying it's very common among them.

With my 100's, I do suck them down and end up calling the dive before others, all though I have gotten much better.

So can anyone chime in that owns the 130's. I really don't see them that much here in MoCal very rare, we see the 100's a lot and many dive doubles.

Thanks,

MG

Bigger tanks are not always the answer. It all depends on what you are doing. For example, if you are cave diving, I would go with the bigger tanks if for no other reason than that the larger gas volume adds a level of safety to it. If you are open water diving and an HP100 seems to small, have your buddies watch you in the water. Frequently longer dive times will result from maintaining a horizontal attitude in the water, coupled with an easy, rhythmic fin technique. Pay attention to "danglies" (ie; gauge consoles, octo's, etc.) hanging loose and creating drag.

I think you'll find that with practice and close attention to form, your RMV will show marked improvement.

 

[ae3753]

Don do you own any 130's I could try?

I don't, but there's a few in MoCal that you might be able to borrow. I'll PM you possibilities.

 

[kanonfodr]

Mike,

I normally dive LP95s and when I took my Essentials class I was borrowing one of Eric G's HP130s...no real difference on land in how they feel, but all that extra gas was nice albeit that COLD California water made the extra bottom time both a blessing and a curse.

You saw how small a guy I am, and I have been diving my LP95s almost exclusively (I did have to borrow an AL80 for a three tank boat dive). My bathroom scale weighs them in at almost exactly 40 pounds. The chart I have ( Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan ) shows the 130s weighing 43. You will notice the difference from your 100s on land, but I'm sure that if you double them up, then switch back to a single 130 you will feel almost free.

Oh yes, in relation to the comment about them doing well on boats, I had an issue today with my 95s not fitting in the tank holders on the boat I was diving from. I remedied the situation with a pair of bungee cords I keep in my Jeep. 15 bucks at Wal-Mart will buy you a box of varied sizes to keep in your car.

In the end, I second the idea that you should borrow one or two and go dive them to see for yourself if you are comfortable with them. For me and my absurdly high gas consumption, my 95s let me keep up with an average diver on an AL80. I wouldn't trade them for much, except maybe a pair of single HP100s. I have bands and manifolds if you're interested in a trade .

Peace,
Greg