Q1_Aircraft: Engine profiles and weights

John,

I think what he means is that many engines of similar horsepower with
smaller displacement make their power at higher rpms than can effectively be
used with a direct drive prop. The Rotax 912 makes its 80 horsepower at
5500 rpm, and depends upon a gear reduction drive to deliver that power in a
usable rpm range. But it only has 74 cubic inches. An engine with more
displacment can make that power at a lower rpm.

Kerry

_____

From: John Loram [mailto: johnl@... ]
Sent: Thursday, March 03, 2005 11:06 AM
To: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject: RE: [Q1_Aircraft] Re: Engine profiles and weights


Ryan; I curious about your comment, 'Keep in mind that an airplane flys
best with large cubic inches not just horsepower.'.

I've never here it before. Could you explain further?

regards, -john-


________________________________

From: Tri-Q1 [mailto: rryan@... ]
Sent: Thursday, March 03, 2005 7:17 AM
To: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject: [Q1_Aircraft] Re: Engine profiles and weights



Dave,

Keep in mind that an airplane flys best with large cubic inches not
just horsepower.

The Onan worked because it is 48 cubic inches. How many cubic inches
do these new engines have?

Ryan

--- In This email address is being protected from spambots. You need JavaScript enabled to view it. , 'davedrosen' <d2r@t...> wrote:
>
> All,
> Great site and guess I'm going to have to spend some time in it. I
> spoke to a prop expert today and I've been convinced that the
> Hexadyne may not work well due to the low rpm combined with a short
> prop. So I need an engine.... One with a higher rpm on the output
> shaft. Are onan's still available? Are there other options. I've
read
> the Jinx/Brock paper, I guess this is an option. In that paper they
> mention they tried several 4 strokes and none worked (I guess the
RPM
> was a problem here too). I noticed the only other engines being
used
> are Rotax, Onan and I saw one Kohler V twin. Any suggestios out
> there?
> Thanks
> Dave R.
> Q1
> Texas
>
>
>
> --- In This email address is being protected from spambots. You need JavaScript enabled to view it. , 'John Loram' <johnl@l...> wrote:
> > Here ( home.adelphia.net/~aeroengine/index.html ) is a web
> site
> > with a truly staggering amount of info about Horizontally-Opposed
> Piston
> > Aero Engines.
> >
> > regards, -john-
> >
> > ________________________________
> >
> > From: ccivortex@b... [mailto:ccivortex@b...]
> > Sent: Sunday, January 30, 2005 2:45 PM
> > To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > Subject: [Q1_Aircraft] Engine profiles and weights
> >
> >
> > I am working on two different designs of aircraft for which I need
> > engine data.
> >
> > I'd like to believe that somewhere in the internet universe, there
> > exists a website that has 3 view outlines of the popular aircraft
> > engines. Lycomings, Continentals, Jibaru, Suburu's, Rotax's, etc
> the
> > various iterations within each manufacturers engine lineup and
> their
> > respective weights, displacements, etc.
> >
> > I've not found it yet. Anyone here know of such a library and how
it
> > can be queried?
> >
> > Thanks
> >
> > Art Bianconi
> >
> >
> > For more information, please visit our web site:
> > www.vortexgenerator.net
> >
> > The contents of this message and any attachments were checked by
> > Norton AV before being sent, using an AV list not more than 24
hours
> > old.
> >
> >

---

End of forwarded message

---

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> > [Non-text portions of this message have been removed]





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[Non-text portions of this message have been removed]

Kerry et al,
For a short prop, like the Q1 needs, around 48' isn't higher RPM is
what's needed to compensate for the short prop. Especially if you
want to get the speed; airframe redline. I believe airframe design
redline is around 147 mph, rumor only. Does anyone know the real
readline?

Dave R.
Q1
Texas


--- In This email address is being protected from spambots. You need JavaScript enabled to view it. , 'Kerry Powell' <kgpowell@a...>
wrote:
> John,
>
> I think what he means is that many engines of similar horsepower
with
> smaller displacement make their power at higher rpms than can
effectively be
> used with a direct drive prop. The Rotax 912 makes its 80
horsepower at
> 5500 rpm, and depends upon a gear reduction drive to deliver that
power in a
> usable rpm range. But it only has 74 cubic inches. An engine
with more
> displacment can make that power at a lower rpm.
>
> Kerry
>
> _____
>
> From: John Loram [mailto:johnl@l...]
> Sent: Thursday, March 03, 2005 11:06 AM
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Subject: RE: [Q1_Aircraft] Re: Engine profiles and weights
>
>
> Ryan; I curious about your comment, 'Keep in mind that an airplane
flys
> best with large cubic inches not just horsepower.'.
>
> I've never here it before. Could you explain further?
>
> regards, -john-
>
>
> ________________________________
>
> From: Tri-Q1 [mailto:rryan@s...]
> Sent: Thursday, March 03, 2005 7:17 AM
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Subject: [Q1_Aircraft] Re: Engine profiles and weights
>
>
>
> Dave,
>
> Keep in mind that an airplane flys best with large cubic inches
not
> just horsepower.
>
> The Onan worked because it is 48 cubic inches. How many cubic
inches
> do these new engines have?
>
> Ryan
>
> --- In This email address is being protected from spambots. You need JavaScript enabled to view it. , 'davedrosen' <d2r@t...> wrote:
> >
> > All,
> > Great site and guess I'm going to have to spend some time in
it. I
> > spoke to a prop expert today and I've been convinced that the
> > Hexadyne may not work well due to the low rpm combined with a
short
> > prop. So I need an engine.... One with a higher rpm on the
output
> > shaft. Are onan's still available? Are there other options. I've
> read
> > the Jinx/Brock paper, I guess this is an option. In that paper
they
> > mention they tried several 4 strokes and none worked (I guess
the
> RPM
> > was a problem here too). I noticed the only other engines being
> used
> > are Rotax, Onan and I saw one Kohler V twin. Any suggestios out
> > there?
> > Thanks
> > Dave R.
> > Q1
> > Texas
> >
> >
> >
> > --- In This email address is being protected from spambots. You need JavaScript enabled to view it. , 'John Loram' <johnl@l...>
wrote:
> > > Here ( home.adelphia.net/~aeroengine/index.html ) is a
web
> > site
> > > with a truly staggering amount of info about Horizontally-
Opposed
> > Piston
> > > Aero Engines.
> > >
> > > regards, -john-
> > >
> > > ________________________________
> > >
> > > From: ccivortex@b... [mailto:ccivortex@b...]
> > > Sent: Sunday, January 30, 2005 2:45 PM
> > > To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > > Subject: [Q1_Aircraft] Engine profiles and weights
> > >
> > >
> > > I am working on two different designs of aircraft for which I
need
> > > engine data.
> > >
> > > I'd like to believe that somewhere in the internet universe,
there
> > > exists a website that has 3 view outlines of the popular
aircraft
> > > engines. Lycomings, Continentals, Jibaru, Suburu's, Rotax's,
etc
> > the
> > > various iterations within each manufacturers engine lineup
and
> > their
> > > respective weights, displacements, etc.
> > >
> > > I've not found it yet. Anyone here know of such a library and
how
> it
> > > can be queried?
> > >
> > > Thanks
> > >
> > > Art Bianconi
> > >
> > >
> > > For more information, please visit our web site:
> > > www.vortexgenerator.net
> > >
> > > The contents of this message and any attachments were checked
by
> > > Norton AV before being sent, using an AV list not more than 24
> hours
> > > old.
> > >
> > >

---

End of forwarded message

---

> > > For more information, please visit our web site:
> > >
> > > www.vortexgenerator.net
> > >
> > > Thanks for writing CCI.
> > >
> > > The contents of this message and any attachments were checked
by
> > Norton
> > > AV
> > > before being sent, using an AV list not more than 24 hours old.
> > >
> > >
> > >
> > >
> > > ________________________________
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > > * To visit your group on the web, go to:
> > > groups.yahoo.com/group/Q1_Aircraft/
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Terms of
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