X-Virus-Scanned: clean according to Sophos on Logan.com From: "Christian And Tamara Mcdonald" Received: from mail-io0-f177.google.com ([209.85.223.177] verified) by logan.com (CommuniGate Pro SMTP 6.1.11) with ESMTPS id 8824347 for flyrotary@lancaironline.net; Wed, 27 Jul 2016 06:44:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.223.177; envelope-from=christamarmc@gmail.com Received: by mail-io0-f177.google.com with SMTP id q83so66753422iod.1 for ; Wed, 27 Jul 2016 03:44:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=mNl+CKJg8LRy+fPFgSTpbRCn1kFtd7BVzd11SpiicwQ=; b=0PbHhkioJDPtmao9x6JRM/80sk1LCVOE5Mwo3Ggp0cYNUBwjJMuvTeIF3GXuiS+hPB a//XVJLoYSUv/AefhgU5SPfK8RLaVU6Dnnf5wgTHmsNmycEAMbbn0z5sgVXhY1s4q4Ra eP9iC960y7n8dnO2LfBDsqhsIhzKjQ4UWwacDvIQKD2GorAFYcegNASdwlBzVD8KZWcI eu8+Rvzi/VkvZlWZZqT+e/LOSPYEV78LY/2SkW2MbTW1p2H5pseRENqUELh6V4W/0PmA orYvSmRsAfsH6l7cF3TFlAJ46QBrvVMlIyRaocFTmdx06UekOciUTS70I6kIZEwm92SI EETA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=mNl+CKJg8LRy+fPFgSTpbRCn1kFtd7BVzd11SpiicwQ=; b=YaiWjoYdut2RYUuYBV4DlM4fzE99GasUwDXT/wqDsCfWxHdig51+yAbVLbIJItUbK9 4OBomXEwfQrGFH//ORNc8slcuvFoCGgP0m8VHfoOpsa3OhK8IjqEXw13Px9CMjIdBViN twljMoAofg82a7OLYSHBNXeEkP9aBRrgxgXE6RlNCX1qgBF7inZT7aCdbTcuboPHJSVx KncTSt9JUIMc+vuN8UGGNHUiyWzLbNkIxSZVEvexYbBgJjsAzukAEcegt5Uk2ZDnM9Ae HfqgoswyLU7x089bGB7kioj88K/1N6ps7mTjxJzaemO9ARgBxoSyA9e03+d/eDfrVeD1 h8BA== X-Gm-Message-State: AEkooutvCou1KHC0l8U4gFaPGRTzWcKf1X67IXUUnKt/8H/Y57jpT3G6hqWUA/YzxkA1ERDOGLDdZYd4/AnNOw== X-Received: by 10.107.57.215 with SMTP id g206mr34545172ioa.194.1469616269581; Wed, 27 Jul 2016 03:44:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.178.136 with HTTP; Wed, 27 Jul 2016 03:44:29 -0700 (PDT) In-Reply-To: References: Date: Wed, 27 Jul 2016 20:44:29 +1000 Message-ID: Subject: Re: [FlyRotary] New PSRU on the Horizon To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a114ab9c2b4622105389bb36d --001a114ab9c2b4622105389bb36d Content-Type: text/plain; charset=UTF-8 Hi Charlie Just curious as to where you got the 8k figure from? I currently have the 2.85 ratio Tracy box running a 68" prop and can't get my engine past 7500 in a dive and the level attitude and nearly 190kts, personally I would like at least 7500 on takeoff as I can only achieve 6500 rpm . Just curious as to what everyone else is achieving , my renises is p ported Cheers Christian On Wednesday, 27 July 2016, Charlie England wrote: > Ok. It's a shame that Neil isn't on here to ask, since he designed the new > drive. > > Charlie > > > -------- Original message -------- > From: Kelly Troyer > Date:07/26/2016 10:40 PM (GMT-06:00) > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: New PSRU on the Horizon > > Charlie, > On your question about a 2.85 you need to send an e mail to > Randy.......... > > Best > Kelly > > On Tue, Jul 26, 2016 at 10:00 PM, Charlie England < > flyrotary@lancaironline.net > > wrote: > >> On 7/26/2016 8:41 PM, Kelly Troyer wrote: >> >> Group, >> >> This will be of interest to the Group.........Randy Kempf of >> http://www.rotarpower.com/ in collaboration with >> Neil Unger of Australia is gearing up to produce a new PSRU that would >> seem to eliminate any weak points >> in Tracy Crook's popular RDx searies of PSRU's.........Check out his >> website and the PSRU page........ >> >> >> Kelly Troyer >> >> >> Hi Kelly, >> >> Thanks for the update. It's great that a drive will be available again, >> but it's a shame he chose such a wide ratio. Hardly anyone will want to >> operate the engine at 8k rpm, and even if they do, it will need a larger >> diameter prop than most homebuilts can swing safely, due to ground >> clearance issues. More typical operating rpms down in the 6k range mean >> sub-1800 prop rpm, which begs an even larger diameter prop. >> >> Any chance he'll offer the more conventional 2.85? (Something closer to >> 2.5 would be even nicer, to get prop rpm closer to the design point for >> most homebuilt airframe/engine combos.) >> >> Charlie >> > > > > -- > Kelly Troyer > Dyke Delta_"Eventually" > 13B_RD1C_EC2_EM2 > --001a114ab9c2b4622105389bb36d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Charlie=C2=A0
Just curious as to where you got the 8k figure from?

I currently have the 2.85 ratio Tracy box running a= 68" prop and can't get my engine past 7500 in a dive and the leve= l attitude and nearly 190kts, personally I would like at least 7500 on take= off as I can only achieve 6500 rpm .
Just curious as to what ever= yone else is achieving , my renises is p ported

Ch= eers
Christian

On Wednesday, 27 July 2016, Charlie England= <flyrotary@lancaironline= .net> wrote:
Ok. It's a s= hame that Neil isn't on here to ask, since he designed the new drive.
Charlie


-------- Original message -----= ---
From: Kelly Troyer
Date:07/26/2016 10:40 = PM (GMT-06:00)
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: New PSRU on the Horizon

Charlie,
=C2=A0 =C2=A0On your question about a 2.85 you ne= ed to send an e mail to Randy..........

Best
=
Kelly

On Tue, Jul 26, 2016 at 10:00 PM, Charlie England &l= t;flyrotary@lancaironline.net>= wrote:
=20 =20 =20
On 7/26/2016 8:41 PM, Kelly Troyer wrote:
Group,

=C2=A0 =C2=A0This will be of interest to the Group.........Randy Kempf of =C2=A0http://www.ro= tarpower.com/=C2=A0in collaboration with
Neil Unger of Australia is gearing up to produce a new PSRU =C2=A0that would seem to eliminate any weak poin= ts
in Tracy Crook's popular RDx searies of PSRU's.........Check out his website and the PSRU page........ =C2=A0

=C2=A0
Kelly Troyer


Hi Kelly,

Thanks for the update. It's great that a drive will be available again, but it's a shame he chose such a wide ratio. Hardly anyone will want to operate the engine at 8k rpm, and even if they do, it will need a larger diameter prop than most homebuilts can swing safely, due to ground clearance issues. More typical operating rpms down in the 6k range mean sub-1800 prop rpm, which begs an even larger diameter prop.

Any chance he'll offer the more conventional 2.85? (Something close= r to 2.5 would be even nicer, to get prop rpm closer to the design point for most homebuilt airframe/engine combos.)

Charlie



--
Kelly Troyer
Dyke Delta_"Eventually&quo= t;
13B_RD1C_EC2_EM2
--001a114ab9c2b4622105389bb36d--