hp capacity of B belts
mark
airboat and a chev 350 will have 1 pulley and the shaft with prop will
have the other. I am putting a spring loaded belt tensioner in there
as well. The engine will never go above 3000, want a 1:1 final ratio.
Will there be much slipping, short belt life or should this work OK.
Thanks
Mark Rand
It'll work, if you don't mind a belt life measured in minutes.
Google for belt size calculators or belt selection calculators.
Mark Rand
RTFM
Wes
That link might help you.
Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller
Denis G.
Here’s another source that might help you. See section starting at
page D-42:
http://www.martinsprocket.com/2001/SecDc.pdf#D152
Steve Lusardi
starboard of the centerline. He used 4 "B" belts with a 25 HP diesel. It was a nightmare that almost killed him. Belt choice is
all about drawbar pull and speed. Work the numbers against the belt manufacturers rating. If a belt must be used, you are talking
of a 6 to 8" wide toothed belt and 15" diameter pulleys. Then you have the same problem discovered by the designers of hovercraft
boats and that was noise. At the speed these belts ran, the air trapped between the belt and the pulleys would create the most
incredible scream. It was deafening. Their solution was to cross drill the pulleys with air bleed holes.
Steve
"mark" <mark...@hotmail.com> wrote in message news:4cdbd4ee-9317-47bb...@o36g2000vbl.googlegroups.com...
Steve Lusardi
will burn up.
Steve
"Steve Lusardi" <steve...@lusardi.de> wrote in message news:hjguc0$p7h$02$1...@news.t-online.com...
IanM
180HP so all parts available off the shelf anywhere. It needs a Kevlar
laminate chain guard in this application to contain it safely if it ever
fails.
Fit a Scottoiler to keep it properly lubed and happy.
<http://www.scottoiler.com/pc/Kits/Scottoiler_vSystem.html>
Pity you aren't using a bike engine. It would already have the sprocket
and be designed for the side load on the bearings.
--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL:
Gunner Asch
I rather like belt drives. And they work very well on motorcycles.
Harley is one example.
Gunner
Whenever a Liberal utters the term "Common Sense approach"....grab your
wallet, your ass, and your guns because the sombitch is about to do
something damned nasty to all three of them.
Mark Rand
>
>
>I rather like belt drives. And they work very well on motorcycles.
>Harley is one example.
>
>Gunner
>
Yabbut not V belts:-)
Mark Rand (had a nice belt drive 440 Kawa for a while)
RTFM
mark
Should be interesting, I tried to explain this to my father in law but
he insisted to order the pulleys and belts. So if/when this fails what
is the next best option. Can you buy toothed belts and cogged pulleys
like a harley uses, do they use split tapered bushings? What are they
called, would a belt/bearing supplier be able to order this stuff? I
guess the cheapest route would be some heavy chain #60 or so and some
sprockets. Thanks
Ned Simmons
wrote:
>On Jan 24, 10:02�am, Mark Rand <ra...@internettie.co.uk> wrote:
You should be looking at one of the proprietary toothed belts. Gates
Polychain GT is one that'll do over 100HP at 3000RPM. They're not
cheap, and you still have to be concerned about side loads on the
engine's bearings, though the load won't be as bad as with V-belts.
Chain running at those speeds will need some sort of lube system.
--
Ned Simmons
mark
> On Sun, 24 Jan 2010 07:01:40 -0800 (PST), mark <markha...@hotmail.com>
>
> - Show quoted text -
When you say the gates GT system is not cheap are you talking 500,
1000 or more for the 2 pulleys and a belt?
Do motorcycles lube their chains?
David Billington
http://www.inficad.com/~bdhull/engine.html . Interesting project, I
think you need to investigate carefully each drive system option and
weigh up the pro and cons. Any multiple or wide belt drive system will
require careful alignment. You might also want to look at poly V belt
drive. Contitech have a good technical document. Here are their drive
belt options
http://www.contitech.de/pages/produkte/antriebsriemen/antrieb-industrie/antrieb-industrie_en.html
Ned Simmons
wrote:
>On Jan 24, 11:33�am, Ned Simmons <n...@nedsim.com> wrote:
For two 8mm pitch x 62mm wide pulleys, a belt, and 2 bushings -- about
$400. If you go thru the selection procedure and give me part numbers
I can give you a closer cost estimate.
You aren't stuck with Gates. There are similar products from other
mfrs.
>Do motorcycles lube their chains?
Motorcycle chains don't operate at 5000+ feet/minute.
--
Ned Simmons
mark
> On Sun, 24 Jan 2010 11:05:34 -0800 (PST), mark <markha...@hotmail.com>
Those prices seem reasonable, I will look into it. The 4 groove 7"
sheaves I ordered are just over $100.00ea. plus bushings and 4 belts.
If a motorcycle is in 5th gear (1:1) and the engine is turning
@5000rpm isn't that faster than what I am planning?
mark
>
> - Show quoted text -
Could you recomend the pulley diameters, widths for the gates poly
chain...I want 1:1 ratio and the 2 shafts are approx. 34" apart. The
engine would produce 200hp max. but we only be running it at 3000rpm.
Snag
My bike is geared down at the primary about 5:3 and at the final drive
something like 2:1 . The 70 tooth rear wheel sprockets are often available
on ebay for a few bucks - but they're only good for about a hunnerd horses .
These pulleys use a centering bore and 5 bolts . You might consider a belt
designed for motorcycle primary drive , they see higher RPM's .
--
Snag
"90 FLHTCU "Strider"
dca...@krl.org
>
> Could you recomend the pulley diameters, widths for the gates poly
> chain...I want 1:1 ratio and the 2 shafts are approx. 34" apart. The
> engine would produce 200hp max. but we only be running it at 3000rpm.
I am really surprised that you want a 1:1 ratio. I am not an
aeronautical engineer but I thought that propellers worked best at
about 2000 rpm. At higher rpms they generate more turbulence.
Dan
spaco
Pete Stanaitis
-------------------
John
The critical point is the speed of sound. The tips of the blades
should never exceed, or practically approach too closely, the speed of
sound.
Cheers,
John B.
(johnbslocomatgmaildotcom)
Bruce L. Bergman
wrote:
And you don't want the belts failing on you in the middle of a swamp
with a hurricane blowing in - or a grass fire approaching rapidly, or
a dozen other Oh Shit!! situations.
Robinson and several other small helicopters use V-belts as their
final drive - but they are engineered systems that have ridiculous
high safety margins. You don't have to be quite as over-safe, but it
can't hurt to have a very healthy cushion.
Call Gates or Dayco or Goodyear or any of the other big players - they
all have OEM Engineering departments to help with design and
selection,and they all have downloadable engineering guides if you
want to figure it out for yourself... Because of course they want to
sell the belts and parts to you, in quantity if you start mass
marketing the design.
--<< Bruce >>--
mark
wrote:
> On Mon, 25 Jan 2010 18:40:52 +0700, John <johnbslo...@invalid.com>
> wrote:
>
>
>
>
>
> >On Sun, 24 Jan 2010 15:49:28 -0800 (PST), "dcas...@krl.org"
> ><dcas...@krl.org> wrote:
>
> >>On Jan 24, 11:33 pm, mark <markha...@hotmail.com> wrote:
>
> >>> Could you recomend the pulley diameters, widths for the gates poly
> >>> chain...I want 1:1 ratio and the 2 shafts are approx. 34" apart. The
> >>> engine would produce 200hp max. but we only be running it at 3000rpm.
>
> >>I am really surprised that you want a 1:1 ratio. I am not an
> >>aeronautical engineer but I thought that propellers worked best at
> >>about 2000 rpm. At higher rpms they generate more turbulence.
>
> >> Dan
>
> >The critical point is the speed of sound. The tips of the blades
> >should never exceed, or practically approach too closely, the speed of
> >sound.
>
> with a hurricane blowing in - or a grass fire approaching rapidly, or
> a dozen other Oh Shit!! situations.
>
> final drive - but they are engineered systems that have ridiculous
> high safety margins. You don't have to be quite as over-safe, but it
> can't hurt to have a very healthy cushion.
>
> Call Gates or Dayco or Goodyear or any of the other big players - they
> all have OEM Engineering departments to help with design and
> selection,and they all have downloadable engineering guides if you
> want to figure it out for yourself... Because of course they want to
> marketing the design.
>
> --<< Bruce >>--- Hide quoted text -
>
> - Show quoted text -
Well I got the boat finished and ran it for about 30 minutes at WOT,
2500rpm with the prop. The 4 B belts are not slipping at all, the
prop is preventing the engine (350 chev.) from turning up any more, if
they were slipping the engine would rev. higher. After about 30
minutes there is no sign of abnormal wear. I can see this being very
fun, I was driving it around the snow covered yard, didn't get a
chance to try it in the water yet. I put a spring loaded tensioner on
the belts but they are not very tight. Opposite the tensioner I can
move the belts about 2". Time will tell if they last long term. If
anyone wants to see pictures let me know.
Jim Wilkins
> ...
> Well I got the boat finished and ran it for about 30 minutes at WOT,
> 2500rpm with the prop. The 4 B belts are not slipping at all, the
> prop is preventing the engine (350 chev.) from turning up any more, if
> they were slipping the engine would rev. higher. After about 30
The B belt on the home-made hydraulic pump drive on my tractor failed
with no evidence of wear. One or more of the cords broke and the belt
rolled about 120 degrees and no longer grabbed the pulley. I could
bend it sideways by hand.
jsw
Gunner Asch
wrote:
>On Jan 25, 3:37�pm, Bruce L. Bergman <bruceNOSPAMberg...@gmail.com>
Please!!
Gunner
"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.
This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost
mark
> On Tue, 9 Mar 2010 18:05:13 -0800 (PST), mark <markha...@hotmail.com>
because I don't think you can post them here, if you are being
sarcastic then you are hilarious and should consider another line of
work, maybe stand up comedy.
Ed Huntress
Gunner wants to see the photos, seriously. He's also gone for a week.
You're right, you can't post them here. But we have an associated dropbox
you can use (and then please come back and provide links here, for the folks
who would like to see them -- which I suspect is quite a few).
Click on "Using the Dropbox."
--
Ed Huntress
mark
> "mark" <markha...@hotmail.com> wrote in message
>
> - Show quoted text -
Actually I will post a link to another forum which I have been getting
help from as well. My pictures are there to see.
http://www.southernairboat.com/phpBB3/viewtopic.php?f=85&t=25494