3M Engines
wgalligan
wgalligan at cnbcom.net
Tue Apr 29 07:23:03 AKDT 2003
I'll save the code stuff for Art Wagoner, airline pilot that is always using his Code stuff on us... CODE I= OK green light CODE II = caution CODE III... He aint goin no where...
Yep your right vibration, osicaltions, harmonics all an interesting subject.
> Hi Wayne,
> As you know ... vibration is much more interesting than that. > (interesting ... that's code for confusing) Just think about the side to > side loads due to the acceleration of the crankshaft counterweight at > the same moment as the beginning of the engine's torque impulse. The > calculations are all possible, and I refuse to do them! I did the > experiment, it didn't take much time, and both two and four-strokes > shook no more than I am used to.
> Later,
> Dean
>
>
> -----Original Message-----
> From: wgalligan [mailto:wgalligan at cnbcom.net]
> Sent: Monday, April 28, 2003 4:32 PM
> To: discussion at nsrca.org
> Subject: Re: RE: 3M Engines
>
>
> By doing so you are increasing the the mass around the center of the > mount.
> Sure it will work but you are adding addition leverage by moving the > engine off center. Increasing vibration or the force behind it. Thinkof > it as a lever principle. The further out the lever(engine cylinder and > prop) is the easier it is to move the load(mount). Just my observation. > Any time you can keep the weight of the mass closer to the center of > rotation the better you are. You are also off setting the leverage > point thus putting an uneven pressure on the mount disks.
>
> Boy finally got to use some of the geometry I studied 3O yrs ago.
>
> Wayne
>
> > Hi,
> > With the Hyde mount inverted, the engine mounting surface is about > 1/2" > higher than the center of the hockey-puck. The whole mount moves > down > the same amount ... so the firewall gets three new mounting > holes. I > have had no problem with both an FZ a number of two-strokes > in the > JEKYLL. You need a nose-ring, of course.
> > Dean
> >
> > -----Original Message-----
> > From: wgalligan [mailto:wgalligan at cnbcom.net]
> > Sent: Monday, April 28, 2003 1:51 PM
> > To: discussion at nsrca.org
> > Subject: Re: 3M Engines
> >
> >
> > Why would you have to drill new hole in the firewall. The 3M fits > just > like an O.S. 1.40 to the dimension. If you use the oring header > and > already have an engine mounted the header coupler may hit. This > is > cured by moving the engine out to the end of the mount beams. If > the > engine mount is already set in the plane then a Karl Mueller > header > willl work. He makes one for us that fits great and will clear > the > mount. His headers are T&A <VBG> or email me off list for the > fix I > have and I'll send ou a photo.
> >
> > WG
> >
> > thinking out loud.
> > >
> > > Would that not put the center of the engine off the center of the > > > mount? Like maybe 3/8" off center? Does it matter?
> > >
> > > GW
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: Dean Pappas
> > > To: discussion at nsrca.org
> > > Sent: Monday, April 28, 2003 10:05 AM
> > > Subject: RE: 3M Engines
> > >
> > >
> > > The standard Hyde mount will accomodate the 3M or O.S. headers if > it > > is inverted. This does require drilling new holes in the > firewall.
> > > Regards,
> > > Dean P.
> > > -----Original Message-----
> > > From: Kenneth Velez [mailto:kvelez at rochester.rr.com]
> > > Sent: Wednesday, February 26, 2003 9:42 PM
> > > To: discussion at nsrca.org
> > > Subject: 3M Engines
> > >
> > >
> > > Hello everyone,
> > >
> > > I have a question to those using the 3M Mintor engines. I'm > trying > > to figure out if the exhaust port bolt pattern is the same as > in the > OS > 1.40 RX. I can not use the stock heather on my plane set > up because > it > hits the engine mount and I was wondering if the Mac's > heather for > the > OS will fit.
> > > Thanks in advance.
> > >
> > > Ken V.
> >
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