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Old 28 July 2008, 07:41   #21
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Country: Canada
Town: Newmarket
Boat name: ELA
Make: METZELER
Length: 4m +
Engine: 20 Suzuki
Join Date: Sep 2007
Posts: 157
60 liters of fuel over a 177 km round trip

That's 4km per liter. Just wondering would you say a 4 stroke would have brought that up to 6km per liter? I am back to selling my metzeler and brigs in hopes that next year get the GRX 420. Would like to step up to a 30-40 4 stroke. Would also like to put a running sun canopy and a steering wheel in it with two bench seats that can be removed, maybe a 470:-) My metzeler empty is about 575lbs, the gemini with wifes camping gear( a lot more than mine) I figure on 500-600lbs. I know you load your 470 heavy just wondering how the cat hull holds up and does it stay as ridged over chop. Also how is the steering with that large of load?
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Old 28 July 2008, 08:04   #22
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Country: Canada
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Sorry Easyrider

Sorry for getting a bit off topic but I'm trying to sell both my boats and pick up a cat hull sib. It's nice to hear your enthusiasm for this style of boats as will. From what I can understand yours is lighter than the Dive Gemini maybe more like the GRX. Just wondering do you think a 30hp 4 stroke plus 500lbs of people and gear would do the trick to get from A to B then empty it and still have fun pulling a tube?
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Old 28 July 2008, 08:29   #23
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Country: Canada
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Make: Gemini
Length: 4m +
Engine: 40hp 2 str
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Dan,

Apparently Evinrude is coming out with a 30 hp ETEC that is going to weigh somewhere around 150 lbs. Similar in weight to a 30 hp 4 stroke, but it should have a bit more zip with just as good of fuel economy. I'd be curious to try a 4.2 GRX or a 4.1 surfcat to see how they perfom as well. The fellow I bought my boat from uses some waterproof PVC duffle bags (similar to the Sealine ones, but he makes them himself) that he straps on top of the tubes of his GRX when he and his wife go on a multiday trip, whic frees up floorspace.

There can be a small mount of floorboard flex when going fast over very choppy conditions.

If you are ever out to Manitoba, let me know and we'll take the boat out.
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Old 29 July 2008, 09:52   #24
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Country: UK - England
Town: NE
Boat name: RedGazelle
Make: Gemini GRX420 SIB
Length: 4m +
Engine: Mariner 40 2s
Join Date: Nov 2004
Posts: 105
Quote:
Originally Posted by Easyrider View Post
The difference is that the sibs with speed tubes still have a centeral keel/hull-this is the part that causes the slamming in a chop.The Surfcat hull is a catermaran hull with a deep but thin sponson/hijacker either side of a flat deck-the best way to see the profile is to google an image search for "thundercat boat" or "zapcat" as these have exactly the same setup(slightly different profile though).
I should imagine that it is possible to add speed tubes, which will make it more stable at speed, but you will still get the pounding when out in a slight chop due the hull profile.
Hope this makes sence.
This is my Gemini 420 Surf/GRX at about 20-25kts on a flat day, no payload. Note how the base of the cat hulls are reinforced with a rubber triangular profile. The shape helps slice through chop.

As you can tell by my previous posts, I love this boat. Having helmed various SIBs and RIBs from 12-36ft, I haven't found anything that leaves me with the same smile at the end of a day on the water. No other boat I have come across combines the same single-handed practicality, speed, seaworthiness and payload capacity.

I bought this boat in 2003, primarily so that I could self launch from a surf beach, cross an exposed bay (11NM) and return safely at the end of the day. Bar a few capsizes (my fault, whilst playing in large surf with high onshore winds), it has proved to be a superb boat, capable of a significant amount of abuse.

It's now seeing use as a family day boat, a weekend expedition boat and a tow/safety boat for big wave surfers.

I will probably add to it with a Caesar Surfcat early next year (providing Caesar finally get back to me regarding whether they can produce the boat in hypalon). Expeditions around a few more of the UK's exposed coasts beckon in 2009!

Ed
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Old 01 August 2008, 18:10   #25
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Country: Canada
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Gemini Cat scam

Has anyone heard of this?
http://www.thundercatinflatable.com....86.html?p=3205

Does this miss badging happen often? Makes you wonder about ordering on line or by mail from other countries.
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Old 01 August 2008, 19:13   #26
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Country: UK - England
Town: Sussex
Make: Ceasar Surfcat
Length: 4m +
Engine: Tohatsu 50hp
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Posts: 105
I know what you mean- ive read that thread before. The only thing that would concern me is that you just dont know what the quality of workmanship/materials used is like, its probably absolutely fine, but we all know dodgy quality stuff keeps getting churned out from over that way.
I'd be interested to know what the prices are though.

This looks like a practical thundercat- http://www.zebec.co.kr/english/boat/others_torpedo.htm
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Old 02 August 2008, 07:10   #27
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Country: Germany
Town: Germany/Texas
Boat name: wicked weasel
Make: 3.6m Metzeler Maya S
Length: 3m +
Engine: 6hp
Join Date: Jul 2008
Posts: 50
I stumbled across two companies, when looking for inflatable information in the Internet.

One in China and the other in Korea. The Chinese had models from many well known brands and said they now produce for over twenty western companies. They produce to your specs, Hypalon or PVC, it is all up to you. Every option you could think of was available, all being seen in the high end of the market and a lot that has not made the mass-market yet.

RIBs with aluminum, glass or kevlar/composite hulls, etc. Low End, High End, you decide. They will ship naked tubes, or complete boats.

Minimum order was 200.

The Korean company was similar, but listed a fewer number of companies that it delivered to.

These websites were both aimed at the manufactures, and were not consumer oriented.

Both factories looked "state of the art", and well equipped with all new looking western branded equipment. Not the type of facilities you are used to seeing in this market. There was a lot of money being invested by someone there.

I wish I had kept the links but it was no surprise to me, and when I read the minimum order, I quickly read through the pages and moved on. I was looking for something else at the time.

The problem for us living in Europe is there is no law here, that requires a “Country of Origin” or “Country of Manufacture” label as is legally required in North America.

If you live here, you will never know for sure if you are really buying what you are being told you are buying, i.e. a locally produced product.
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Old 02 August 2008, 09:40   #28
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I am familiar with the zebec boats, and while inexpensive, they just aren't going to have anywhere near the life expectancy of the South Afican built cat hulls. That and they simply will not perform as well either. I'd rather save up and pay double for a product that will last 6 times as long as the Korean or Chinese made knock off.
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Old 02 August 2008, 14:51   #29
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Knock-offs

What I got from the the blog was that the Korean, Chinese were making knock offs and badging them Gemini's ex: just like they do with watches.
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Old 03 August 2008, 08:17   #30
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Country: UK - England
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I looked at these a couple of years ago, but I wanted to seat 4 (including 2 children) and it didn't look easy.

If you had a choice between say a 5.2m RIB and one of the Caesar surfcats - which one would you pick in a choppy sea (I'm starting to venture further afield and the Zodiac slams too much for the children's liking) ?
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