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 <coastiefamily4@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

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 <bhughes@qnsi.net> 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" <coastiefamily4@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.   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?  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.

 

Brian Trubee

-----Original Message-----
From: coastiefamily4 <coastiefamily4@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