X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: "Marc Wiese cardmarc@charter.net" Received: from [47.43.20.25] (HELO impout001.msg.chrl.nc.charter.net) by logan.com (CommuniGate Pro SMTP 6.3.5) with ESMTPS id 209217 for flyrotary@lancaironline.net; Sun, 15 Aug 2021 15:03:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=47.43.20.25; envelope-from=cardmarc@charter.net Received: from smtpclient.apple ([97.94.202.172]) by cmsmtp with ESMTPA id FLPYmKQfD058iFLPYm6ZYQ; Sun, 15 Aug 2021 19:03:09 +0000 Authentication-Results: charter.net; none X-Authority-Analysis: v=2.4 cv=aeOkITkt c=1 sm=1 tr=0 ts=611964ed a=xycr6CVXJRVtFs4WRGOeRA==:117 a=xycr6CVXJRVtFs4WRGOeRA==:17 a=HZJGGiqLAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=vnREMb7VAAAA:8 a=RzCzmDu2rL8olw3Y_nIA:9 a=QEXdDO2ut3YA:10 a=36tLu8z9_WP7uCAE:21 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 Content-Type: multipart/alternative; boundary=Apple-Mail-AAFACE9D-C3F8-4DD2-99D9-19AC6EC1933B Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Subject: Re: [FlyRotary] Re: Interesting "Twin Pack" Rotary Demo Idea Date: Sun, 15 Aug 2021 14:03:08 -0500 Message-Id: References: In-Reply-To: To: Rotary motors in aircraft X-Mailer: iPad Mail (18G82) X-CMAE-Envelope: MS4xfJn6cFytnW637ACqX4QH2YCGuwQmZ1DcfDCObVQuS9IO8wCkP0btkHv7jAbtNu2H1udbMhoquGUwTH2ZB+RBbNxdf7D4TZzlODCxjoR/QqQTRaRHv3uG yHz5pSuJMoUSfCdHkOjUHKVF+czB5Y1/AdFbqzGeMxNrPWIzHMLRyCpseAMvsqNjNdSJEucJm+WJ+MSv9HK9Y0g4AZRBEwpE0uM= --Apple-Mail-AAFACE9D-C3F8-4DD2-99D9-19AC6EC1933B Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Indeed! And IIRC, the Russian Wankels HAD a =E2=80=98twin pac=E2=80=99 rotar= y engine arrangement. 2 twin rotor engines coupled together side by side thr= u a clutch override assembly so there was redundancy. They used in in helico= pters. I remember seeing pictures of these engines. Kinda cool. But WHY 2 si= ngle rotors=E2=80=94=E2=80=94? M Sent from my iPad > On Aug 15, 2021, at 10:20 AM, Ernest Christley echristley@att.net wrote: >=20 > =EF=BB=BF > I don't understand. What's the benefit? It looks to me like he doubled t= he weight, made the water cooling much more complicated, and added zero powe= r. >=20 > -The Mazda design uses coolant to transfer heat from the spark plug side, w= hich is very hot, to the intake side, which is very cold. This helps keep t= he engine from turning into a banana. > -The Mazda design has the two rotors on opposite sides of the shaft, so th= at they counterbalance each other somewhat. The counterweights would to cou= nter the offset weights in the third dimension. > -In the Mazda design, the two rotors share the two ends of the shaft for d= riving accessories on one end, and output power on the other. > -In the Mazda design, the two rotors share an oil pump > -The Mazda design the two rotors share one of the side housings. > -It would be no more difficult to fit counter-rotating props to a Mazda th= an to this. >=20 > Nice CAD work, but did he discuss any possible benefit he's expecting? >=20 > On Sunday, August 15, 2021, 09:09:59 AM EDT, RV9flyer 13B Rotary rv9flyer1= 3b@gmail.com wrote: >=20 >=20 > An aero-engineer on the VANS Alternative Engine list posted his dream proj= ect on creating a Twin Pack single rotor to put in an RV-8. Some very creat= ive thinking to bring it along this far IMO! =20 >=20 > Doug=20 >=20 >=20 > https://www.youtube.com/watch?v=3DkMxJ7G-lRhk >=20 >=20 --Apple-Mail-AAFACE9D-C3F8-4DD2-99D9-19AC6EC1933B Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Indeed! And IIRC, the Russian Wankels HAD a= =E2=80=98twin pac=E2=80=99 rotary engine arrangement. 2 twin rotor engines c= oupled together side by side thru a clutch override assembly so there was re= dundancy. They used in in helicopters. I remember seeing pictures of these e= ngines. Kinda cool. But WHY 2 single rotors=E2=80=94=E2=80=94?

M

Sent from my iPad

=

On Aug 15, 2021, at 10:20 AM, Ernest Christley ech= ristley@att.net <flyrotary@lancaironline.net> wrote:

=EF=BB=BF

I don't understand. Wha= t's the benefit? It looks to me like he doubled the weight, made the w= ater cooling much more complicated, and added zero power.

-= The Mazda design uses coolant to transfer heat from the spark plug side, whi= ch is very hot, to the intake side, which is very cold. This helps kee= p the engine from turning into a banana.
-The Mazda design has the two rotors on opposite sides of the shaft,= so that they counterbalance each other somewhat. The counterweights w= ould to counter the offset weights in the third dimension.
-In the Mazda design, the two rotors share the tw= o ends of the shaft for driving accessories on one end, and output power on t= he other.
-In the Mazda design, t= he two rotors share an oil pump
= -The Mazda design the two rotors share one of the side housings.
-It would be no more difficult to fit count= er-rotating props to a Mazda than to this.

Nice CAD work, b= ut did he discuss any possible benefit he's expecting?

=20

=20
On Sunday, August 15, 2021, 09:09:59 AM EDT, RV9flyer 13= B Rotary rv9flyer13b@gmail.com <flyrotary@lancaironline.net> wrote:

An aero-engineer on the VANS Alternative Engine list posted his dream p= roject on creating a Twin Pack single rotor to put in an RV-8. Some ve= ry creative thinking to bring it along this far IMO!

Doug

=

https://www.youtube.com/= watch?v=3DkMxJ7G-lRhk

<= /div>

= --Apple-Mail-AAFACE9D-C3F8-4DD2-99D9-19AC6EC1933B--