Sideways engine?

[David Lockhart]

I think Nat (the Aerodynamic Voodoo Guru, <G>) has pointed out the the issue
we care about most - dynamic balance.

FWIW - I keep very close track of wing and stab weights when building and
all my wing/stab panels are generally within a gram or two.  I haven't
statically balanced (other than CG) or added tip weight to one of my models
in the past 15 years and haven't found a need to do so.

Regards,

Dave Lockhart
DaveL322 at comcast.net

----- Original Message -----
From: Nat Penton
To: discussion at nsrca.org
Sent: Wednesday, January 14, 2004 10:02 PM
Subject: Re: Sideways engine?


If lateral balance is attained with assymetric weight distribution then the
plane would be dynamically unbalanced, that is there would be assymetric
forces during accelerated roll . I suppose this might be noticeable with
significant assymetric weight distribution, but probably not with what we
are talking about. Mike Nauman where are you ?
----- Original Message -----
From: Jeff Hughes
To: discussion at nsrca.org
Sent: Tuesday, January 13, 2004 10:03 PM
Subject: Re: Sideways engine?


I flew an Arch Nemisis with a st2300 at the 7:30 location and you couldn't
tell any difference. As long as the plane is balanced lateraly it really
doesn't know where the cylinder head is.

----- Original Message -----
From: Woodward James R Civ 412 TW/DRP
To: discussion at nsrca.org
Sent: Tuesday, January 13, 2004 12:22 PM
Subject: RE: Sideways engine?


I think Ron Ellis flew Sam Turners first Saturn with the ST2300 positioned
at the 07:30 spot, and original muffler down the center.
Jim W.

-----Original Message-----
From: John Ferrell [mailto:johnferrell at earthlink.net]
Sent: Tuesday, January 13, 2004 11:19 AM
To: discussion at nsrca.org
Subject: Re: Sideways engine?

That makes sense to me. I am really surprised that the question did not get
a bigger response though.
I am way too lazy to conduct any testing on my own. I probably lack the
skill necessary to discern the difference any way.

John Ferrell
6241 Phillippi Rd
Julian NC 27283
Phone: (336)685-9606
johnferrell at earthlink.net
http://DixieNC.US
NSRCA 479 AMA 4190  W8CCW
"My Competition is Not My Enemy"
----- Original Message -----
From: george kennie
To: discussion at nsrca.org
Sent: Tuesday, January 13, 2004 1:30 PM
Subject: Re: Sideways engine?

John,
I'm not sure if I'm right on this, but I think that I would like to have all
that Mass(bulk & weight of the engine head) located on the centerline of the
aircraft.I think that all that off-center mass could produce some unexpected
and unwanted effects during snap type maneuvers(and probably others) where
radical changes in aircraft speed differentials might magnify the off-center
forces in a detrimental way causing exagerated pitch and roll responces
making control during certain maneuvers difficult to compensate for. I don't
have any empirical data to back any of this up, but it just doesn't feel
right to me.
Georgie
John Ferrell wrote:
>From Eric's recent post on another topic:Mounts his engine sideways> Uses a
more regular header etc.I have forgotten what the advantages are to inverted
engine mounting. Like the matter of retracts which seems to have become a
personal choice, I wonder if it really matters to the flying
characteristics. An engine on its side is more tolerant of flooding, easier
the plumb the exhaust, easier to connect/disconnect the glow plug. I expect
that it would spin & snap differently depending on direction, but that seems
to be the norm with the engine inverted too.  John Ferrell
6241 Phillippi Rd
Julian NC 27283
Phone: (336)685-9606
johnferrell at earthlink.net
http://DixieNC.US
NSRCA 479 AMA 4190  W8CCW
"My Competition is Not My Enemy"

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