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: "Le Roux Breytenbach breytenbachleroux@gmail.com" Received: from mail-ed1-f45.google.com ([209.85.208.45] verified) by logan.com (CommuniGate Pro SMTP 6.3.5) with ESMTPS id 151299 for flyrotary@lancaironline.net; Mon, 19 Jul 2021 03:45:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.45; envelope-from=breytenbachleroux@gmail.com Received: by mail-ed1-f45.google.com with SMTP id t2so22284590edd.13 for ; Mon, 19 Jul 2021 00:45:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=GryV04LBznR/eRvu/W3M9P9ZRfgzXAwXg+uGjc0G69k=; b=NmK/fX0Fbhb8GboFlTPZDXr3m2+ELQcRttpmpofVZ1WKbkMxk7k5uqWCnhJp7AUFdx KQx6s9l8SXVYlrOnHpw/A1AwIh3WYFHYljH7HUZ940qK6AATIKVVX6KBzZhTvmtP9ria DeMBIbdQzFbfh5O/KTe6UDT1gANpcI0enIdpeJweCkdQHwxSuXN/fcG58gRJJQiR+CYJ c9LEBwQfGYod/7ZTKUNDvo4DGnKeZOt5TA1CzcUMT9R630zVX+IdX0GxA9XojP6IPzDI oinoOfxFiPzadz6dyONM7qLw/BvrKSJDaQodGxzXcIMToh4gLFNyVqyr58bNwXN+nN3z hQzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=GryV04LBznR/eRvu/W3M9P9ZRfgzXAwXg+uGjc0G69k=; b=sQL/LzhmcLeQrB62o19wznfsHwQKfBfaKfas7+4IATh4CLehgoYucYP/c4EvFXxGBf YdToVrWaR+WDd1jBnAnld+M7VVSIbbDw+CHb6hw53x3qmZmwXxzb8GUiVl2WQ5GNj23N ar3boHifO7G9Lk3g0Y1lsqVn5W4YOoPaKIb0S+jP4zA9daA7OhddDL4McqGix0u9LmEL p1QbnuptHcoJETNoYZn8RdPVVjhvqczb+OkKv9L/u5NM/ebpWEQZ+tfqMBvDsx9Ywb7G BiR5bfnJmXjJQCIDgKXCrNVtrXEjQ9ZgAR+lOLcrS97rtKiFzjGSxR4vKXfYb7iG0zED lYoA== X-Gm-Message-State: AOAM533xruQoPKPub1vO6NBSVmru4x8hYYAAjOjVrRETVsOPVk9PSK+6 mf8QCsJiJLgG/H9s40VyhnZ9T1tNllWzgl+d+R8GErNwZR8= X-Google-Smtp-Source: ABdhPJwLlK6n5sbT6Iy1TqQx3bPAwdDsSIvugMm137HjMMdf73i9t4MqAxdAV0BJiioEsE0a54JL5nSzr+Xe5eiwGjM= X-Received: by 2002:aa7:cb19:: with SMTP id s25mr33163667edt.194.1626680725698; Mon, 19 Jul 2021 00:45:25 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 19 Jul 2021 09:45:14 +0200 Message-ID: Subject: Re: [FlyRotary] Re: Ross Redrive Dimensions To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000d1793805c7751ece" --000000000000d1793805c7751ece Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Neil here is a calculator to calculate the proposed tip speed of a prop. https://warpdriveprops.com/propspd2.html The Ross Redrive is a 2.17:1 at 6500 turning 2995 rpm on flange 68 inch diameter prop tip speed 0.790 Mach (Maximum performance between 0.8-0.92 Mach.) I don't no - as you say it is trial and error all the time. With my set up i walk in the shadow of Ed Anderson as i also has turned the 13B 90* Just completing the engine mounts (the ears that fit to the steel housings) must still drill the mounting holes. https://drive.google.com/file/d/1Iaut0S4Ia1oUj1sM3Vd83JDyRyU1jiHZ/view?usp= =3Dsharing Fitting the intake manifold and brackets to hold in place https://drive.google.com/file/d/1ItZJegjOc4StYEsqszwAReOicJTZx4sH/view?usp= =3Dsharing Have find some Barry type rubber isolator that fits in the 40 mm holes https://drive.google.com/file/d/1gavn548KN1LEamoEMPIsOSJPm3sIrbT3/view?usp= =3Dsharing Le Roux On Mon, Jul 19, 2021 at 9:12 AM Le Roux Breytenbach breytenbachleroux@gmail.com wrote: > =EF=BB=BF > Neil : > > > Yes, the ring gear is threaded and locked. > > I did not loosen it, as it was not necessary for me to do so. > > Obviously, it must have right hand thread to tighten at propeller thrust, > with the anti-clockwise propeller (pilot side view) > > The needle bearings are pressed into a sleeve and the sleeve in the > aluminium-housing and the shaft slipped tight fit into it. > > The propeller flange locked everything in place, and then there is just > enough end play on the shaft. > > The shaft must be put into refrigerator and the prop flange into oven to > press fit into place. > > It must be line-up precisely for the lock pins to match the holes first > time. After press fit there will be no chance to rotate the prop flange a= s > it is very tight fit. > > > > Included is a couple of photos and video clips for clarity as a photo is > worth a thousand words. > > > > Here is the steel 12 lug 6 planetary. As always a arm and leg in price > > > https://www.ctpowertrain.com/c6-e4od-4r100-new-6-pinion-12-lug-steel-rear= -low-reverse-planet-66-on/ > > Photos > > > https://drive.google.com/file/d/1tDiLL85_Q8IzKrTne1vfyVB67y4x4JA-/view?us= p=3Dsharing > > > https://drive.google.com/file/d/1NVoGiYLYWB6VrJKaKEuKqcMrtDIa54s-/view?us= p=3Dsharing > > > https://drive.google.com/file/d/1lf7WUnpI2UUTtgAMaQjH8oSTQFe_70oP/view?us= p=3Dsharing > > > https://drive.google.com/file/d/1zKQwAbq2IXrFb9uGZHNxYdwbnbt1jp4C/view?us= p=3Dsharing > > > https://drive.google.com/file/d/1dK_ZVwdlLfK4ABWWwryDqIi8wAhxMP-8/view?us= p=3Dsharing > > > https://drive.google.com/file/d/1kaO9qpJQX6A9S9_27D6f6PZMY4NN1aAS/view?us= p=3Dsharing > > Video Clip: > IMG_9785.MOV > > IMG_9783.MOV > > IMG_9783.MOV > > > > Sent from my iPhone > Le Roux Breytenbach > > On 19 Jul 2021, at 01:24, 12348ung@gmail.com > wrote: > > =EF=BB=BFLe roux, > First Lou Ross was an excellent machinist so tolerances > are tight. I suspect that the ring gear may be threaded and then > loctited?? I am guessing in the dark without being unable to sight "in > person" Then in order to get bearings over the shaft, one of the ends mus= t > be able to be removed. I can understand the oil holes to allow movement = of > oil for lubrication and possibly cooling. So it appears that Lou assembl= ed > the bearings on the shaft and then the final assembly was the prop shaft = to > hold all together, hence the 3 pins. Are thrust bearings behind the prop > flange or in front of the ring gear. How did Lou allow for thrust both > ways? > Without a fixed ring gear the rotation will be less in RPM and counter > clockwise. > You say Ford g/box bits available? Can you tell me where, as to date no > one in the US will answer emails let alone sell me bits? What is the pro= p > tip speed at 2900 rpm? Seems high, so must be smaller dia than normal? > Nothing like a guess to be verified in practice. My experience with = P > ports is that they do give a little extra HP, but not as much as Paul Lam= ar > often quoted. However just get flying and then fiddle, or you may never > leave the ground -- we all fiddle too much and go by hearsay far too much= . > Regards, Neil. > > -----Original Message----- > From: Rotary motors in aircraft > Sent: Thursday, March 18, 2021 9:23 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Ross Redrive Dimensions > > =EF=BB=BFNeil: I got it wrong the propellor flange and ringgear flange is= not the > same. > Can=E2=80=99t figure it out ? how the ringgear side flange is stuck to th= e hollow > shaft.Seems to me it has thread that screw in. Somehow it must be locked.= I > did not removed the pilot bearing as there is no need to do so as it is > still brandnew never been used. > The propellor flange has 3 pins that holds it in place after the pressfit= . > The hollow shafts needle bearings ,run over the oil holes in the shaft, > and there is some holes between them too. > > > This psru is counter rotating and a 2,17 : 1 ratio.Therefor needs an anti > - clockwise prop pilotside view. I am planning to put in just a 6 pinion > planet steel casing planetary No other modifications to be done.There is = a > 6 pin planetary with 12 lug available to drop into the housing. > I believe with the 2 - 44 mm p ports @ 6500 rpm will have sufficient Hp > for take off and climb turning the prop at 2900 rpm. > The at =E2=80=9Ctop of climb =E2=80=9C level out and cruise at 2300 prop = rpm. > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > --000000000000d1793805c7751ece Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Neil here is a calculator to calculate the proposed=C2=A0t= ip speed of a prop.


The Ross Redrive is a 2.17:1
at 6500 turning 2995= rpm on flange
68 inch diameter prop tip speed 0.790=C2=A0 Mach= =C2=A0 =C2=A0(Maximum perf= ormance between 0.8-0.92 Mach.)

I don't= =C2=A0no=C2=A0- as you say it is trial and error all the time.
With my set up=C2=A0i walk in the shadow of Ed Anderson as i a= lso has turned the 13B=C2=A0 =C2=A090*

Just comple= ting the engine mounts (the ears that fit to the steel housings) must still= drill the mounting holes.


Fitting the intake manifold and bra= ckets to hold in place


Have find some Barry type rubber isol= ator that fits in the 40 mm holes

https://drive.google.com/file/d/1gavn548KN1LEamoEMPIsOSJPm3sIrbT3/view?usp= =3Dsharing

Le Roux

On Mon, Jul 19, 2021 at = 9:12 AM Le Roux Breytenbach = breytenbachleroux@gmail.com <flyrotary@lancaironline.net> wrote:
=EF=BB=BF
Neil :


Yes, t= he ring gear is threaded and locked.

I did not loosen it, as it was not necessary for me to do so.

Obviously, it must have right hand thread to tighten at propeller thrust, with the anti-clockw= ise propeller (pilot side view)

The needle bearings are pressed into a sleeve and the sleeve in the aluminium-housing and the s= haft slipped tight fit into it.

=

The propeller flange locked everything in place, and then there is just enough end play o= n the shaft.

The shaft must be put into refrigerator and the prop flange into oven to press fit into place= .

It = must be line-up precisely for the lock pins to match the holes first time. After press fit there will be no chance to rotate the prop flange as it is very tight fit.<= /span>

=C2= =A0

I= ncluded is a couple of photos and video clips for clarity as a photo is worth a thousand words.

=C2=A0

Here is the steel 12 lug 6 planetary. As always a arm and leg in price

=C2=A0https://www.ctpowertrain.com/c6-e4od-4r100-new-6-pinion-12-lug-steel-rea= r-low-reverse-planet-66-on/

= Photos=C2=A0

https://drive.google.com/file/d/1tDiLL85_Q8IzKrTne1vfy= VB67y4x4JA-/view?usp=3Dsharing

htt= ps://drive.google.com/file/d/1NVoGiYLYWB6VrJKaKEuKqcMrtDIa54s-/view?usp=3Ds= haring

https://drive.google.com/file/d/1lf7WUnpI2UUT= tgAMaQjH8oSTQFe_70oP/view?usp=3Dsharing



Video Clip:
=C2=A0IMG_9783.MOV
=C2=A0IMG_9783.MOV


Sent from my iPhone
= Le Roux Breytenbach=C2=A0

On 19 Jul 2021, at 01:24, 12348ung@gmail.com <flyrotary@lancaironline.net> wrote= :

=EF= =BB=BFLe roux,
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0First Lou= Ross was an excellent machinist so tolerances are tight.=C2=A0 I suspect t= hat the ring gear may be threaded and then loctited??=C2=A0 I am guessing i= n the dark without being unable to sight =C2=A0"in person" Then i= n order to get bearings over the shaft, one of the ends must be able to be = removed.=C2=A0 I can understand the oil holes to allow movement of oil for = lubrication and possibly cooling.=C2=A0 So it appears that Lou assembled th= e bearings on the shaft and then the final assembly was the prop shaft to h= old all together, hence the 3 pins.=C2=A0 Are thrust bearings behind the pr= op flange or in front of =C2=A0the ring gear.=C2=A0 How did Lou allow for t= hrust both ways?
=C2=A0 =C2=A0Without a fixed ring gear th= e rotation will be less in RPM and counter clockwise. =C2=A0
You say Ford g/box bits available?=C2=A0 Can you tell me where, as to dat= e no one in the US will answer emails let alone sell me bits?=C2=A0 What is= the prop tip speed at 2900 rpm?=C2=A0 Seems high, so must be smaller dia t= han normal? =C2=A0=C2=A0=C2=A0Nothing like a guess to be verified in practi= ce. =C2=A0=C2=A0My experience with P ports is that they do give a little ex= tra HP, but not as much as Paul Lamar often quoted.=C2=A0 However just get = flying and then fiddle, or you may never leave the ground -- we all fiddle = too much and go by hearsay far too much.
Regards, =C2=A0Nei= l. =C2=A0

-----Original Message-----
From: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thursday, March 18, 2021 9:23 PM
To: R= otary motors in aircraft <flyrotary@lancaironline.net>
Subj= ect: [FlyRotary] Ross Redrive Dimensions

= =EF=BB=BFNeil: I got it wrong the propellor flange and ringgear flange is n= ot the same.
Can=E2=80=99t figure it out ? how the ringgear= side flange is stuck to the hollow shaft.Seems to me it has thread that sc= rew in. Somehow it must be locked. I did not removed the pilot bearing as t= here is no need to do so as it is still brandnew never been used.The propellor flange has 3 pins that holds it in place after the pre= ssfit.
The hollow shafts needle bearings ,run over the oil = holes in the shaft, and there is some holes between them too.


This psru is counter rotating and a 2,= 17 : 1 ratio.Therefor needs an anti - clockwise prop pilotside view. I am p= lanning to put in just a 6 pinion planet steel casing planetary No other mo= difications to be done.There is a =C2=A06 pin planetary with 12 lug availab= le to drop into the housing.
I believe with the 2 =C2=A0- 4= 4 mm p ports @ 6500 rpm will have sufficient Hp for take off and climb turn= ing the prop at 2900 rpm.
The at =E2=80=9Ctop of climb =E2= =80=9C level out and cruise at 2300 prop rpm.


--
Homepage: =C2=A0http://www.flyrotary.com/Archive and UnSub: =C2=A0=C2=A0http://mail.lancaironl= ine.net:81/lists/flyrotary/List.html
--000000000000d1793805c7751ece--