cool,my next question was gonna be if the 27 Mag was a progression of that boat. I doubt there has ever been as successful of a hull as that one (24 or 27).

I too love the beautiful sound of a I/O BUT... I will say that I have grown to love the sound of nice high winding OB.
The 36 and new 41 Pantera would be a real nice package with OB's in my opinion.

Steve1 thank you again for all the info. you provide...a true credit to everything that is right about our beloved sport.

Angel

Steve, you have done it again. Great thread, great info. I see another record setter start'n:drink:

I most humbly thank you for reading my threads and the very nice comment.

Sir thank you for reading this and your encouraging comments.

The 29 Magnum which was the mother of the 27 was a seperate project as I understand it from talking to Harry years ago,Like when they stuck the first 28 Cigarette and sunk the mold behind the place they went and got another 27 Magnum for a plug, Also Larry Smith drug one out to California as the basis of his Scarab line from what I was told also. While on the subject Giovanni tooled up a really cool deck for his bringing the 27 Magnum back on line, they said that there were 450 built back in the "Day".

After the 91 Race I talked in depth to Doc Magoon about doing a Miami To New York he was ready to go anytime.

What I had planned was a floating fuel tank that looked like a Big Cheetahcat and was going to try to make it straight through without refueling again the fuel consumption from the race was the basis of that strategy.I wanted to run outboards and the Doc was leaning to the inboards.

The story here is the Kuwaitis were running that blue and white Cat closest to the camera ,a Skater pop called a Al Shaali Tiger cat after this race they bought a Cheetahcat from me.


http://www.youtube.com/user/Cheetahc.../2/3dTn-ay8G2c

I wish I would have seen these threads 10 years ago thanks for all your knowledge and sharing.

One of the YOUTUBE titles says

36 Cheetacat , 840 HP, 146 MPH

Tell us about that boat buddy.

Sir I thank you for reading this and your nice comment.

We did some testing on the first boat with a triple setup also and 2.4's it ran in the 120's but never quite right (I never built a deflector or even planned for triples) ,anyway after the Key west WC in 91 word of this Cat got overseas and the boat wound up in the UAE seems the guys in Abu Dhaibi were looking to knock the big Dubai Sheik out of "S" Class.

The story I got was: when it got there it was checked over, measured and the boys walked away laughing, it was a radical boat and the running surface is mass specific which told me volumes about the competition.

To make a long story short it had a 6 minute lead in its very first race in front of everybody at Dubai no less and Victory stopped Both laughing and racing "S" that very day.

Now this went on for 2 years and the boat won a truck load of prize money and bunch of cars, everything was cool long as Rashid did enough to win ,but that all changed in 94 at the UIM World title race he ran way out in front of Buzzi winning but a week Later the UIM passed a new ruling that the 6 Liter "S" Class had a 10 Meter length limit since the Cheetahs were the only ones longer at 11 Meters the boat was effectively banned.

OK what to do? Rashid got Modified 2.5's and Phil Rolla did the props , Anyway here I was thinking the boat was dead and then I get a call from Rashids Uncle Jabbar (serious heavy hitter there)all excited giving me the speeds anyway ole M-11 was a famous boat for a while. They brought me the video in person.

Steve can you explain the term "mass specific"? Is it meant that the shape and running surface is designed to carry a specific mass of boat?

I gave the boat no more running surface than was needed by my calculations off the projected weight, Now for all this to work I had to Guarantee the weight and build the boat VERY Light in fact I never heard of one done that light (I can do better nowadays) but then was a different time and I was alone working this out step by step.

Dave the bottom on Momma Cheetahcat

http://i49.tinypic.com/bgbxag.jpg



The Top




http://i47.tinypic.com/29b0jkl.jpg

Dave running along here,,, now Excluding any "slamming loads" bottom pressure maybe 15 PSI ( I used to set my bottom structures for 60+ PSI of loading) there just is not the mass present to create any higher pressure.


http://www.youtube.com/watch?v=h1csGLgX4tk

Steve i notice the running surfaces on your Cheetah are different then anything i have ever seen, from then or now. This surface "A" is flat from the tip of the bow all the way to the transom and actually reminds me of a delta pad keel but full length. I also notice the deadrise seems very steep. What inspired doing it this way and does anyone else use a similar approach? Cool stuff and i can appreciate the "outside the box thinking" especially when you put the competition to rest doing it :drink:


You'll hafta click on the pic to see what i've highlighted.

Have you offered your expertise and successes to any Americans Steve ??

Sir no but I am Open now for anything needed.

Good Eye Dave, when I did the math models at 1200# VS the 15-18 degrees found in 5000# Hulls I came up with something a "little" different in deadrise also a byproduct of the radical bottom clean up was My stuff is able run in the rough and not beat up the crew.Look at a Cheetahcat run it does not create much of a disturbance at high speed everything is on the pads. the second boat I sent to Kuwait they were leading a very rough race and the boat trying to run second behind them crashed killing some people and the race was black flagged. the deadrise allows it to sink just enough in the wave crest to allow a straight path,If you are going up or down the boat is not going forward very fast.

On the M-11 Vid look at the beginning and watch it travel through the pack of M Boats.Watch the first 50 seconds for the cheetahcat then the pads and deadrise will be better explained.

http://www.youtube.com/watch?v=esxxt...eature=related

Drat they disabled my Chili Peppers Aeroplane

makes sense to me. I always thought using a delta pad can give you some speed but at the cost of a harsher ride. Buy coupling it with a steeper deadrise you can restore some of that, so theres is a balance between the two. This was something you found in the math beforehand? So through design you dont necessarily need a heavy boat to tame rough water.


Damn youtube police :angry-smiley-038:

Exactly and that engineered ride will not ever beat you ,The fishing boats also were very well mannered all the way from idle through "Boat" mode and into warp speed very predictable. LMAO it was a cool bit of background music.

Dave I will work on the music the next couple days.

From a Technical standpoint, I honestly do not understand some of the key terms & phrases being used in this thread, but beyond those points, I've learned more from reading the past 10 pages, than I have read anywhere else online.

The knowledge & experiences that Steve has been sharing, is amazing.

Sir stop me anytime and I will break it down a little further and I thank you for the nice comment.

Steve, I cannot begin to tell you how much I am learning from this thread.

Thank you very much!

James

I humbly thank you for the nice comments.

What's a delta pad?

Sir the pad would start narrow then widen at the transom, Kind of a triangle shape.

Dave here is the Pad on a old Cheetahcat 40.


http://i48.tinypic.com/14acy9d.jpg

That is one wild look'in bottom. Do you have any other pics of it? How'd it work?

It ran good and tracked straight I saw one last in Abu Dhaibi in 95,I was working the pad to pickup some lift from the rebound, only used that on 3 of the 12 Meter cats. and the reverse plug for the Diesel project.

Dave here was the 36 "B" Model leaving for Kuwait

http://i49.tinypic.com/efqk5.jpg

Steve, GREAT thread!!
Maybe you can answer this question for me in the simplest of terms in regards to strakes.

How are the angle and placement of the strakes determined? I know strakes create lift but what effects do outter strakes and inner strakes have on lift? Also, how do you decide on what kind of chine you're going to use such(reserse, angled etc)??

Sure we used to divide the bottom into three panels or thirds then place a strake on the edge of those panels (In the back lift strip would be a better term in the forward area spray rail was the term)

the idea is as the boat was pushed down the strakes horizontal surface would provide lift and resistance to that event,at that point in the hull bottom, the 4” wide horizontal strake would provide the lift like 12” of 24 degree dead rise and the outboard strake providing lift when submerged ,The inboard strakes were short in a effort to make the boat squat in the old days and another thing was air running down the bottom of the strake and into the prop Mercury had an old video of it, but I always run them full length get a better prop!
The Europeans also run them full length sometimes and instead of two large Lift strips chose to use three or more smaller ones the effect is the same just not as harsh. I am talking Per Side here.

The reverse Chine people claim better handling (Turning) and the effect is like having a larger chine ,I use that trick in my pads on some of the Cats.

Now back to the bottoms a friend of mine ran a CUV with no strakes (Shead design) and said it ran ok But they welded strakes on it in the end.

Placemant ? Nowadays maybe closer to the keel for a pair. Strakes??? Water skis on your boat now a Pad?? Pad a great Ski down the Keel also a point of the greatest water pressure. Thank you for the nice Complement.

Dave the 5 foot section I cut out of the now 35 went into this soon to be 50 it needed some added beam and the steps have to be radically reworked to get it back in balance.Too make a long story short someone sold them this thing before I got there but we got it working


http://i46.tinypic.com/25584uu.jpg

Nice Apache video.......running in it's element.
http://www.youtube.com/watch?v=tXLoY4_U1YI

Thanks for the video!

Dave this was another Cougar Built by Asia Craft in the Philippines it was the 2nd 38 As I understand it , the first was built in England By Cougar and went to Favya. Dannys "S" Cougar Cat was done by Asia Craft as well. This one started life as the Arneson #6 Cat.

http://i48.tinypic.com/2rhn5a9.jpg

Hey atleast your splashing your own stuff :D


Steve i notice your cats have a sharper pointier nose on the sponsons. My understanding was that this type of profile was steered away from in more recent years for a steeper/blunter nose to help give the boats more rebound (for lack of a better word) to help prevent deep stuffing. What are your thoughts on this?