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How many pounds of thrust to keep a bike moving?
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GYXU > Cycling > How many pounds of thrust to keep a bike moving? 5 May 2005 12:27:02
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How many pounds of thrust to keep a bike moving?

Bruce W.1 5 May 2005 02:57:22
 I was thinking of putting a small turbine engine on my road bicycle,
just for grins. How many pounds of thrust do you think would be needed
to maintain 20 mph?

There's a bunch of tiny jet engines for RC airplanes with from 10 to 50
lbs of thrust. Here's one:
http://www.franktia­no.com/t-750.htm

Here's a video of the mother of all RC airplanes:
http://www.mcgirt.n­et/RC/VIDEOS/Giant_B­52/B52_flight2.wmv
Add comment
Jim Smith 5 May 2005 03:24:57 [ permanent link ]
 "Bruce W.1" <sorry@noDirectEmai­l.com> writes:
I was thinking of putting a small turbine engine on my road bicycle,> just for grins. How many pounds of thrust do you think would be> needed to maintain 20 mph?

About 5 lbsf.
There's a bunch of tiny jet engines for RC airplanes with from 10 to> 50 lbs of thrust. Here's one:> http://www.franktia­no.com/t-750.htm

That one has 95N thrust. At 10m/s (22mph) that is 950 watts, quite a
bit more than any cyclist. Your duty is clear.

http://members.aye.­net/~gharris/blog/sh­opmod07.jpg
Add comment
Guest 5 May 2005 03:52:46 [ permanent link ]
 On Wed, 04 May 2005 22:57:22 GMT, "Bruce W.1"
<sorry@noDirectEmai­l.com> wrote:
I was thinking of putting a small turbine engine on my road bicycle, >just for grins. How many pounds of thrust do you think would be needed >to maintain 20 mph?>
There's a bunch of tiny jet engines for RC airplanes with from 10 to 50 >lbs of thrust. Here's one:>http://www.fra­nktiano.com/t-750.ht­m>
Here's a video of the mother of all RC airplanes:>http://w­ww.mcgirt.net/RC/VID­EOS/Giant_B52/B52_fl­ight2.wmv

Dear Bruce,

At $2795 plus shipping plus tax plus earmuffs plus public
nuisance fine plus fuel at 11 ounces per minute, it will be
an expensive grin.

Slightly off-topic, but why do they come up with 24 pounds
as equal to 95 newtons? Everywhere that I looked, 95 newtons
converts to about 21.36 pounds (9% lower than the claimed 24
pounds), while 5 newtons ends up as 1.124 pounds (12% higher
than the claimed 1.0 pounds).

http://www.onlineco­nversion.com/weight_­all.htm

Are they using troy newtons, imperial pounds, nautical
thrust, or what? Am I just missing something obvious?

Persnicketily,

Carl Fogel
Add comment
Mark Hickey 5 May 2005 08:18:41 [ permanent link ]
 "Bruce W.1" <sorry@noDirectEmai­l.com> wrote:
I was thinking of putting a small turbine engine on my road bicycle, >just for grins. How many pounds of thrust do you think would be needed >to maintain 20 mph?

I'm not sure, but I know it takes a lot more thrust that you get from
a medium-size leaf blower (gas powered). I expected to be pushed to
at least 5-6mph (8-10km/h) but alas, it barely moved me at all. All
noise, no thrust.

Now all I am left to do with it is to blow leaves. Harumph.

Mark Hickey
Habanero Cycles
http://www.habcycle­s.com
Home of the $695 ti frame
Add comment
Meb 5 May 2005 12:27:02 [ permanent link ]
 
JeffWills Wrote: > Bruce W.1 wrote:> > I was thinking of putting a small turbine engine on my road bicycle,> > just for grins. How many pounds of thrust do you think would be> needed> > to maintain 20 mph?> >
There's a bunch of tiny jet engines for RC airplanes with from 10 to> 50> > lbs of thrust. Here's one:> > http://www.franktia­no.com/t-750.htm> >
Here's a video of the mother of all RC airplanes:> > http://www.mcgirt.n­et/RC/VIDEOS/Giant_B­52/B52_flight2.wmv>
It's been done. Vision Recumbents put a 15 pound thrust engine on the> back of one of their bikes, and it pushed the bike to 30 mph. Loud> mother, too. Pictures and movies of it in action here:> http://www.outsidec­onnection.com/gallan­t/hpv/vision/>
Jeff

Any idea on what happenned to the Jet Sabre in the ATP-Vision auction?



Tim Arfons (son of Art Arfons) used this 90 hp JFS 100 13A turbine in
powering a bar stool over 40 mph powered
http://www.turbineg­roup.com/page2.html to get into the Guiness book for
the fastest barstool. This company makes the race track dryers you see
at major oval/drag racing events.


Here is the jet powered Penny Farthing page:
http://www.pennyfar­thing.dabsol.co.uk/p­ulse-je.htm

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GYXU > Cycling > How many pounds of thrust to keep a bike moving? 5 May 2005 12:27:02
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