Engine Sizing and Selection

"Barnyard BOb --" wrote in message
...

(Jay) wrote:


There are very high output 2 stroke motors available around 1hp/lb.
Mainly adapted from snow mobile (Rotax) applications. Used as a
single, the realibility is below what most people desire, but as a
pair, its down right usuable.
++++++++++++++++++++++++++++++++++++++++++

Dictionary.com

DOWNRIGHT = Thoroughgoing; unequivocal
USUABLE = ????

DOWNRIGHT useable -- to you, Fearless Fosdick....
in the safety of your padded cell and rarefied atmosphere.

DOWN HEREon planet earth....
Multi-engine LIABILITY is what it's called by
most experienced pilots that walk the walk.

BULL**** FLAG set for "double trouble".


Barnyard BOb -- multi-engine rated since 1969

Finally, something we both agree on. The only thing I have seen, not in
operable condition more than a Ford, is...
a two cycle rotexx.

Friends don't let friends fly two cycles.
--
Jim in NC

you are right.

I am looking at a simple conventional, left-right engine high-wing aircraft,
that will carry two people.

By the way, nice concept.

"Jay" wrote in message
om...
Since you are using 2 engines, you are in a different position from
the typical experimental aero application as far as the reliability of
each individual componant, and the composite reliability of the system
as a whole. You haven't shared the particular engine configuration
you're planning (e.g. push-pull vs. left right) but the use of two
engines brings additional challenges and opportunities.

Opportunities:
Single ignition motors
Operation at high average outputs
Use of 2 stroke power plants.

Since you have 2 engines, you essentially have redundant everything,
completely decoupled. Real about my twin engine pitch at:

http://inline_twin.tripod.com/concept.html

There are very high output 2 stroke motors available around 1hp/lb.
Mainly adapted from snow mobile (Rotax) applications. Used as a
single, the realibility is below what most people desire, but as a
pair, its down right usuable.

Please share your engine configuration with the group.

Rotary- IMHO great possibilites, sports car engine- high power/weight
ratio for a conversion, fail soft operation (will not seize), 2
plugs/cylinder by default.

On Fri, 31 Oct 2003 22:23:04 -0600, Barnyard BOb --
wrote:


(Jay) wrote:


There are very high output 2 stroke motors available around 1hp/lb.
Mainly adapted from snow mobile (Rotax) applications. Used as a
single, the realibility is below what most people desire, but as a
pair, its down right usuable.
++++++++++++++++++++++++++++++++++++++++++

Dictionary.com

DOWNRIGHT = Thoroughgoing; unequivocal
USUABLE = ????

DOWNRIGHT useable -- to you, Fearless Fosdick....
in the safety of your padded cell and rarefied atmosphere.

DOWN HEREon planet earth....
Multi-engine LIABILITY is what it's called by
most experienced pilots that walk the walk.

BULL**** FLAG set for "double trouble".


Barnyard BOb -- multi-engine rated since 1969

Didn't we go through this discussion talking about inline twins.

A twin powered by two unreliable engines is just an underpowered
single waiting to happen.

--
dillon

Life is always short, but only you can make it sweet

Dillon Pyron wrote:

There are very high output 2 stroke motors available around 1hp/lb.
Mainly adapted from snow mobile (Rotax) applications. Used as a
single, the realibility is below what most people desire, but as a
pair, its down right usuable.


Didn't we go through this discussion talking about inline twins.

Yep.

A twin powered by two unreliable engines is just an underpowered
single waiting to happen.

In my real life flying experience...
Hardly that good, Dillon. 8-(

Wannabees love to dabble in 'loser concepts' since all it takes
is napkin, pen and an audience. It's the 'visions of grandeur'
thing and the Internet that keeps them keep hammering away.
If a whacky scheme is presented often enough, maybe, it can
somehow magically becomes legitimate? You know...
through the magic of 'new technology', ad nauseum.

It's new moon time.
Can hardly wait for the full moon phase.


Barnyard BOb -- over 50 years of flight

Thanks for the positive feedback on my concept plane. That sounds
like you're doing something new too. Have you decided on a pair of
pushers or pullers? Have you modeled it yet? You're looking at
200-240 HP to carry 2 butts in the air, that sounds like you're after
some performance and SE possibilities.

Regards

"Toks Desalu" wrote in message news:dTGob.74373$Tr4.196556@attbi_s03...
you are right.

I am looking at a simple conventional, left-right engine high-wing aircraft,
that will carry two people.

By the way, nice concept.

"Jay" wrote in message
om...
Since you are using 2 engines, you are in a different position from
the typical experimental aero application as far as the reliability of
each individual componant, and the composite reliability of the system
as a whole. You haven't shared the particular engine configuration
you're planning (e.g. push-pull vs. left right) but the use of two
engines brings additional challenges and opportunities.

Opportunities:
Single ignition motors
Operation at high average outputs
Use of 2 stroke power plants.

Since you have 2 engines, you essentially have redundant everything,
completely decoupled. Real about my twin engine pitch at:

http://inline_twin.tripod.com/concept.html

There are very high output 2 stroke motors available around 1hp/lb.
Mainly adapted from snow mobile (Rotax) applications. Used as a
single, the realibility is below what most people desire, but as a
pair, its down right usuable.

Please share your engine configuration with the group.

Rotary- IMHO great possibilites, sports car engine- high power/weight
ratio for a conversion, fail soft operation (will not seize), 2
plugs/cylinder by default.

BOb

Three touch and goes in right seat of SNB in 1965. Sign'd off as an
Instructor Pilot.

The Navy sure did things different G

Big John


On Fri, 31 Oct 2003 22:23:04 -0600, Barnyard BOb --
wrote:

----clip----

Barnyard BOb -- multi-engine rated since 1969

Puller, Jay.
I have the rough draft, but I haven't layout the design yet. That should
come up later. I am just following the book, step by step on designing an
aircraft. In my theory, I am concerned about two things. If I design the
aircraft for high performance, there is a possible that it could pose weight
and balance problem. In another word, if i design to satisfy the weight and
balance, the aircraft could produce high drag. My theory could be wrong, but
I am sure that I will figure it out later. For now, I am looking at various
engines and decide which one.

Thanks, Nuke.
I have already cover most of them, but I haven't seen the rest. So,
thanks!
Toks

Barnyard BOb -- wrote:

It's new moon time.
Can hardly wait for the full moon phase.

On the planet earth, the new moon was a week ago. If your new moon
was yesterday, it could begin to explain much.

David O -- http://www.AirplaneZone.com

It's new moon time.
Can hardly wait for the full moon phase.

On the planet earth, the new moon was a week ago. If your new moon
was yesterday, it could begin to explain much.

David O -- http://www.AirplaneZone.com
+++++++++++++++++++++++++++++++++++

Although my new moon really wasn't yesterday....
It's was close enough for the intended purpose.
Your response could begin to explain much, too. g

Barnyard BOb -- over 50 years of successful flight