Discussion:
Scat hovercraft?
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Kevin Fitz-Gerald
20 years ago
Permalink
Someone is advertising a Scat hovercraft in the local paper. They want
$750.00, but it is not running. I am thinking of buying it, but have not
seen it yet. I have never owned a hovercraft and know little to nothing
about them, other how they work. Might this be worth a look? What should I
look for? Thanks in advance.

Kevin

Remove first three characters of email: ***@defnet.com
r***@pdq.net
20 years ago
Permalink
New set of skirts 400 dollars.
New engine 2000 dollars. Decent over haul 5-700


Scats were loud and had tricky handling. On the other hand, they are
simple, sturdy, and solidly built.
chris serbus
20 years ago
Permalink
thats a good price, If you don't want it let me know where it is, I will
come and get it ,

thanks Chris
Post by r***@pdq.net
New set of skirts 400 dollars.
New engine 2000 dollars. Decent over haul 5-700
Scats were loud and had tricky handling. On the other hand, they are
simple, sturdy, and solidly built.
Dave Schneider
20 years ago
Permalink
Too noisy for my taste. I've been approached and also given the finger for
being too noisy on my 13P! There is no way to be so quiet as to please
everyone, but a Scat is beyond reasonable in my opinion. I don't mean to
offend any scat owners out there. This is just my opinion.
Post by r***@pdq.net
New set of skirts 400 dollars.
New engine 2000 dollars. Decent over haul 5-700
Scats were loud and had tricky handling. On the other hand, they are
simple, sturdy, and solidly built.
Silenthalo
20 years ago
Permalink
please excuse my inexperience... but could someone tell me what a SCAT
type hovercraft is? why is it so loud? and what makes it differ from
other types of hovercraft?
Dave Schneider
20 years ago
Permalink
For noise, a Scat has two things going against it (in my opinion). First
it has a noisy 2-stroke. There are quieter 2-stokes, but the ones on a
Scat are pretty loud. I also think the perception of actual sound level is
different because of the high pitch when compared to a 4-stroke.

The other thing is that the duct on a Scat is very small. To get enough
thrust you really have to spin the blades on a small duct like that. In
comparison, the Weber has one of the largest ducts and is also one of the
quietest.
Post by Silenthalo
please excuse my inexperience... but could someone tell me what a SCAT
type hovercraft is? why is it so loud? and what makes it differ from
other types of hovercraft?
Ken Roberts
20 years ago
Permalink
i'd add something to this. the scat has a fairly small duct, but that duct is
terrible for the purposes of moving air. it has been described as the worst
duct on a commercial hovercraft, though i don't know if that's true. it also
has stators, but those stators reputedly don't do anything but keep the duct
walls from reaching the prop tips, and slow down the air.

i have no first-hand experience in that except by looking into a scat duct and
seeing variable amounts of tip clearance depending on what part of the duct.

that said, my hovercraft has a similar problem just from being a really old
hand-made duct that has been through a lot.

frankly, i think the reason a scat engine is so annoying is that it's mounted up
high. they use a gear box to drive the prop, and the entire engine is in the
open air. it's just plain loud anyway, but this makes it worse.

similarly, if you take a uh-10f and move the engine down to the deck you'll cut
a huge amount of the noise, both in engine and prop.

somebody who is more familiar with scats can give you the company history. they
were at one point pushing hovercrafts hard in the united states, and there are a
lot of them around. the problem is, they have some very bad habits at speed, so
lots of us (me too) don't like them because of the bad habits and the noise, and
the lack of performance.
...
Dave Schneider
20 years ago
Permalink
I can put up with the noise. What worries me the most is that if we (as
hovercraft folks) get too obnoxious, I fear that we will get regulated just
like the PWC. We are already catagorized as air boats by some ... there is
another very loud craft.
...
they
Post by Ken Roberts
were at one point pushing hovercrafts hard in the united states, and there are a
lot of them around. the problem is, they have some very bad habits at speed, so
lots of us (me too) don't like them because of the bad habits and the noise, and
the lack of performance.
Post by Dave Schneider
For noise, a Scat has two things going against it (in my opinion).
First
Post by Ken Roberts
Post by Dave Schneider
it has a noisy 2-stroke. There are quieter 2-stokes, but the ones on a
Scat are pretty loud. I also think the perception of actual sound level is
different because of the high pitch when compared to a 4-stroke.
The other thing is that the duct on a Scat is very small. To get enough
thrust you really have to spin the blades on a small duct like that.
In
Post by Ken Roberts
Post by Dave Schneider
comparison, the Weber has one of the largest ducts and is also one of the
quietest.
Post by Silenthalo
please excuse my inexperience... but could someone tell me what a SCAT
type hovercraft is? why is it so loud? and what makes it differ from
other types of hovercraft?
M***@webtv.net
20 years ago
Permalink
Hi Halo. You need to take the advice you get on Skat hovercraft with a
grain of salt. If you will notice some posters admit they have no
experience with a Skat, but say they dislike them because of their bad
habits. Same way with the blade tip clearance on the duct. They state
that it is the worst commercial duct ever made.
One of their greatest critisisms is the noise. Well, compared to what?
A feather falling in the breeze? Maybe an airplane getting ready for
take-off. Everything is by comparison. I have a Skat. When reved up it
is no louder than a four-wheeler ATV, and the kids and young adults ride
them all over America and nobody complains. As far as the duct
clearance, yes there is an uneven gap in places between the blade tips
and the inner surface of the duct. Now who says that it must be
symeterical and within a few thousands of concentricity? The main
concern is--Does it work. It does, and does it well. Otherwise they
wouldn't complain of it having "bad habits". It gets going to fast for
them!! It flies off the cushion and tends to nosedive like a submarine.
Experienced riders sense the approaching trouble and adjust the balance
by sliding aft on the seat. It will run about 30-35 MPH, which is
plenty to have a bunch of fun. There are people on this newsgroup that
fly them regurlarly. Others have modified them to gain perfection. One
great fellow, Doug Pendleton, had a great website full of information
and modifications on the Skat.
It is not made by Universal Hovercraft so certain people never pass up a
chance to bad mouth the competition.
Now if Bully Boy takes exception to this post he needs to get a pair of
asbestos britches, because he sure as the devil ain't going to like the
next one.
r***@pdq.net
20 years ago
Permalink
Post by M***@webtv.net
Hi Halo. You need to take the advice you get on Skat hovercraft with a
grain of salt. If you will notice some posters admit they have no
experience with a Skat,
I have had several of them over a 10plus year period. Done a lot of
re-design of them.

but say they dislike them because of their bad
Post by M***@webtv.net
habits. Same way with the blade tip clearance on the duct. They state
that it is the worst commercial duct ever made.
The tip clearance is a major determinant of duct efficiency. Judge
for yourself. Another big determinant of duct quality is the amount of
blockage to air entry and exit. Compare a Scat duct to a hovercraft
with a floor monted engine and good fairings.
Post by M***@webtv.net
One of their greatest critisisms is the noise. Well, compared to what?
A feather falling in the breeze?
No. Virtually any twin fan hovercraft. A lot of Scat noise comes from
the gearbox. It sounds like a big dentist drill and cannot be hidden.
See, hovercraft do not have to be obnoxious. In fact, they are more
fun when they are not.

Maybe an airplane getting ready for
Post by M***@webtv.net
take-off. Everything is by comparison. I have a Skat. When reved up it
is no louder than a four-wheeler ATV, and the kids and young adults ride
them all over America and nobody complains. As far as the duct
clearance, yes there is an uneven gap in places between the blade tips
and the inner surface of the duct. Now who says that it must be
symeterical and within a few thousands of concentricity?
It does not have to be, it just works better that way.

The main
Post by M***@webtv.net
concern is--Does it work. It does, and does it well.
Pay your money, take your choice.

Otherwise they
Post by M***@webtv.net
wouldn't complain of it having "bad habits". It gets going to fast for
them!!
My "modified" Scat weighs 100 lbs less than yours and has twice the
thrust.

It flies off the cushion and tends to nosedive like a submarine.
Post by M***@webtv.net
Experienced riders sense the approaching trouble and adjust the balance
by sliding aft on the seat.
Spray in your face, hard to steer, hopeless downwind.


It will run about 30-35 MPH, which is
Post by M***@webtv.net
plenty to have a bunch of fun. There are people on this newsgroup that
fly them regurlarly.
But they are all scared to death of them when going 35mph downwind.

Others have modified them to gain perfection. One
Post by M***@webtv.net
great fellow, Doug Pendleton, had a great website full of information
and modifications on the Skat.
It is not made by Universal Hovercraft so certain people never pass up a
chance to bad mouth the competition.
Now if Bully Boy takes exception to this post he needs to get a pair of
asbestos britches, because he sure as the devil ain't going to like the
next one.
None of us have a clue as to whom you are referring to as "bully
boy". However, you may find that if you post in a sufficiently rude
tone, a good portion of the contributors to the ng will leap to their
feet to claim the role for themselves.
Dave Schneider
20 years ago
Permalink
My suggestion to the original poster is to take the time to attend a rally
and judge for yourself.
...
Ken Roberts
20 years ago
Permalink
hey mc,

i can think of two people who might be considered to be "bully boy" on this
forum, and given the nature of the rest of your post the list narrows down to
one.

as with all my posts, any reference to scat performance is in relation to other
hovercraft designs i know about. yes, i HAVE driven a stock (i think stock)
scat. i've also driven ralph's heavily modified one. i took both of them slow
as to not break another man's toy.

you're right, everything is relative. if a scat is what you want, then go to
it. there are a lot of people who have them and a lot who like them. that's
fine, it's a free country and you can do that if you want. you obviously have
and like yours, i don't have a problem with that.

any warnings i give are to make the potential buyer do research before
committing. if they want a cheap (inexpensive) hovercraft that works, a scat is
fine. if they think they're getting a high performance machine, then they need
to be warned off. i can't think of a single way that a stock scat as sold in
the united states could be considered to be high performance. that was the
nature of my comments. it doesn't go fast or carry a heavy load compared to
other crafts of similar size and power.

as far as a scat going too fast for me or anyone else, i have a hard time
believing that. looking at the whc2002 time trials results, the f3 (250cc) top
guy was only a second or so slower than the f2 guy, (500 cc) and that guy is
only a few seconds slower than the f1 guy. if i remember correctly the
calulated average speed for f1 on that track was in excess of 60 mph, including
more than 360 degrees of turns. so the lead in f3 had to be at least averaging
around 50 mph on a track with a lot of turns.

flying off cushion and nosediving like a submarine under anything like normal
driving conditions is, in my opinion, enough to cause a craft to fail any
standard by which most people would buy a hovercraft. ejection of the driver in
those conditions would be cause for a class action suit if the company still
existed. i routinely deliberately induce plow-in at 60 mph, and it's only
slightly more exciting than hard braking in a car.

doug pendleton was a great guy. he and i occasionally butted heads on this
forum but usually we got along fine. he knew a lot about scats and had at least
one which was fairly heavily modified. he drove a stock scat faster than anyone
else i've met. he would also have to be considered an expert driver of his
chosen craft, which can't be considered in the same light as someone buying
their first hovercraft.

there are a lot of hovercraft brands out there that i like. nearly every
hovercraft i've ridden in or driven, i find something to like about it. this
includes scats, which you might find hard to believe. no doubt if i were to get
a ride in a sevtec, i would find things to like about those as well, which would
probably be hard for a lot of the readers of this forum to believe.

when i hear about people who want to buy or build a certain hovercraft model
that i know something about, i will help them in whatever fashion seems
appropriate. this includes warning builders of universal hovercraft designs of
some of the unpleasant aspects of those models, which is something some folks
seem to ignore.

most of the folks who build uh-12r's contact me privately, but i have a lot of
warnings for people who want to build those. i obviously have a lot of good
stuff to say about them too.

-- bully boy.
...
Ken Roberts
20 years ago
Permalink
dave,

this might be a bit late, but frankly i've been given the finger for using a gas
engine to troll while fishing in a boat. keep in mind that some folks think
that anything but human power should be illegal on water, and there are even
folks who think we shouldn't be on water in any case. the more extreme
eco-freaks get really testy, and the few i've met seem to think they have
exclusive right to the water.

i'm not saying it's ok to be obnoxious, but take it with a grain of salt. most
of the people i've talked to regarding my 12r after seeing it on the water make
no comment about noise, and operating bob windt's blue bomber i've surprised
some folks that i was even near them.
...
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