X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qw0-f49.google.com ([209.85.216.49] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5113504 for flyrotary@lancaironline.net; Sun, 04 Sep 2011 11:24:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.49; envelope-from=coastiefamily4@gmail.com Received: by qwi2 with SMTP id 2so3979423qwi.8 for ; Sun, 04 Sep 2011 08:24:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=Nz0+zrpksq7mFMMwP9dnw3sDVc3TyaWYz1JrnBZkNJ8=; b=i3rq/o9vFTK9Y1WzQ2R+XEdUDo26psu3RxulxQHR4Nfr0/4Fr/NJu4C6/YnKJLZsCU Tn3uHEGI30Da0o/Y8Wx+LEsnYcyTKOr8olqd6cURVdRbPZJiD0Zk1rjN3fhNq1SQEZG4 6vFNKs1JvDbvcrClKVYkjSIzVXcHSdI4RVnoI= MIME-Version: 1.0 Received: by 10.224.71.82 with SMTP id g18mr2281538qaj.303.1315149861208; Sun, 04 Sep 2011 08:24:21 -0700 (PDT) Received: by 10.229.220.134 with HTTP; Sun, 4 Sep 2011 08:24:21 -0700 (PDT) In-Reply-To: References: Date: Sun, 4 Sep 2011 09:24:21 -0600 Message-ID: Subject: Re: [FlyRotary] Re: 20B Tuning From: coastiefamily4 To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=bcaec51ba3e94dc38304ac1f304a --bcaec51ba3e94dc38304ac1f304a Content-Type: text/plain; charset=ISO-8859-1 I think there must be a typo in the manual, I rechecked it this morning and is reads 2150RPM. Instead of 2150 RPMs on the prop I am thinking it should be 2550RPMs for a 76inch prop for a tip speed limit of 850fps equating to 7250 engine RPMs. I will call the manufacture on Tuesday to verify my calculations. I appreciate everyone's comments. On Sun, Sep 4, 2011 at 8:07 AM, Charlie England wrote: > ** > Wow. How big is it? > > > On 09/03/2011 10:50 PM, coastiefamily4 wrote: > > Tip speed > > On Sat, Sep 3, 2011 at 9:18 PM, Kelly Troyer wrote: > >> Is the rpm limit because of diameter (tip speed) or a structural blade >> limitation ?.............. >> >> Kelly Troyer >> *"DYKE DELTA JD2" (Eventually)* >> "13B ROTARY"_ Engine >> "RWS"_RD1C/EC2/EM2 >> "MISTRAL"_Backplate/Oil Manifold >> "TURBONETICS"_TO4E50 Turbo >> >> *From:* coastiefamily4 >> *To:* Rotary motors in aircraft >> *Sent:* Saturday, September 3, 2011 6:06 PM >> *Subject:* [FlyRotary] Re: 20B Tuning >> >> The prop is adjustable, it is hydraulically controlled. I current have it >> set to the fine pitch setting. >> >> On Sat, Sep 3, 2011 at 4:51 PM, Bobby J. Hughes wrote: >> >> If it's adjustable you may need more pitch. A 2150 rpm limit seem very >> low. Bobby >> >> >> Sent from my iPad >> >> On Sep 3, 2011, at 5:57 PM, "coastiefamily4" >> wrote: >> >> This is not full throttle, I have to stop at 6000 RPMs do to the 2150 >> RPM limit on my prop. I am using a VARI PROP, it is great so far. I have >> plenty of throttle, just prop limited. >> >> On Sat, Sep 3, 2011 at 3:44 PM, William Wilson wrote: >> >> 23.3 is just about exactly what would be expected. >> >> Perhaps the throttle is not opening all the way? You would have to have a >> pretty convoluted intake to lose 3" of pressure in it. >> >> >> On Sat, Sep 3, 2011 at 3:40 PM, wrote: >> >> At what density altitude was that measured? Maybe your MAP needs to be >> calibrated. >> >> Brian Trubee >> >> >> >> -----Original Message----- >> From: coastiefamily4 >> To: Rotary motors in aircraft >> Sent: Sat, Sep 3, 2011 1:50 pm >> Subject: [FlyRotary] 20B Tuning >> >> My static MAP before starting the engine was 23.3 >> >> >> >> >> >> >> > > --bcaec51ba3e94dc38304ac1f304a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I think there must be a typo in the manual, I rechecked it this morning and= is reads 2150RPM.=A0 Instead of 2150 RPMs on the prop I am thinking it sho= uld be 2550RPMs for a 76inch prop for a tip speed limit of 850fps equating = to 7250 engine RPMs.=A0 I will call the manufacture on Tuesday to verify my= calculations.=A0

I appreciate everyone's comments.

On Sun, Sep 4, 2011 at 8:07 AM, Charlie England <ceengland@bellsouth.net> wrote:
=20 =20 =20
Wow. How big is it?


On 09/03/2011 10:50 PM, coastiefamily4 wrote:
Tip speed

On Sat, Sep 3, 2011 at 9:18 PM, Kelly Troyer <keltro@att.net> wrote:
Is the rpm limit because of diameter (tip speed) or a structural blade limitation ?..............
=A0
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

From: coastiefamily4 <coastiefamily4@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net&g= t;
Sent: Saturday, September 3, 2011 6:06 PM
Subject: [FlyRotary] Re: 20B Tuning

The prop is adjustable, it is hydraulically controlled.=A0 I current have it set to the fine pitch setting.

On Sat, Sep 3, 2011 at 4:51 PM, Bobby J. Hughes <bhughes@qnsi.net>= wrote:
If it's adjustable you may need more pitch. A 2150 rpm limit seem very low. =A0 =A0Bobby


Sent from my iPad

On Sep 3, 2011, at 5:57 PM, "coastiefamily4" <coa= stiefamily4@gmail.com> wrote:

This is not full throttle, I have to stop at 6000 RPMs do to the 2150 RPM limit on my prop. I am using a VARI PROP, it is great so far.=A0=A0 I have plenty of throttle, just prop limited.

On Sat, Sep 3, 2011 at 3:44 PM, William Wilson <fluffysheap@gmail.com> wrote:
23.3 = is just about exactly what would be expected.

Perhaps the throttle is not opening all the way?=A0 You would have to have a pretty convoluted intake to lose 3" of pressure in it.


On Sat, Sep 3, 2011 at 3:40 PM, <bktrub@aol.com> wrote:
At what density altitude was that measured? Maybe your MAP needs to be calibrated.
=A0
Brian Trubee



-----Original Message-----
From: coastiefamily4 <coastiefa= mily4@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sat, Sep 3, 2011 1:50 pm
Subject: [FlyRotary] 20B Tuning

My static MAP before starting the engine was 23.3








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