REFLECTOR: Prop dia

[Ron N VelocityXLFG]

Sure    sorry Engine RPM 4200 prop 2500 RPM
On 6/6/2013 11:23 AM, steve korney wrote:
> Ron...
>
> It would be helpful to tell us what rpm the prop is turning along with 
> the engine rpm...
>
>
>
> Steve
>
> > Date: Thu, 6 Jun 2013 11:14:25 -0500
> > From: velocityxl at fastmail.fm
> > To: reflector at tvbf.org
> > Subject: Re: REFLECTOR: Prop dia
> >
> > Motor is good . I have been using my fixed pitch through the phase one
> > and it works very well.
> > I am turning my engine 5500 rpm to get a top speed of 180 knots So I
> > got the IVo propeller on ebay and want to give it a try. It is a little
> > long 76 diameter so I was thinking
> > of cutting it down. I will fly with it first to see what it is like
> > before I cut it down. Right now I like to cruise at 145 knots turning
> > 4200 rpm. My comfort rpm . My goal is to
> > run the engine at 4200 and cruise 160 knots with the hope of not too
> > much loss in take off performance.
> >
> > Ron
> >
> >
> > On 6/6/2013 10:49 AM, John Dibble wrote:
> > > I previously flew with 1" shorter blades (66" pitch) for more
> > > clearance. I couldn't quite use full power and stay below 2600 rpm.
> > > So I went back to the 68" pitch recommended by IVO. Now I can easily
> > > get down to 2500 rpm at full power. I think it would go lower, but
> > > haven't checked. 1" change in blade length makes a big difference.
> > > IVO shortened blades for me once. Seems like your 72" blades should
> > > work. Have you checked that the motor is working good?
> > >
> > > John
> > >
> > > On 6/6/2013 10:30 AM, Ron N VelocityXLFG wrote:
> > >> Lower RPM at higher speed. I have a email out to Ivo to see about
> > >> making the blades shorter . Have not heard back yet.
> > >> From past experience they are a little slow in response.
> > >>
> > >>
> > >> Ron
> > >> On 6/6/2013 8:10 AM, John Dibble wrote:
> > >>> On 6/5/2013 4:13 PM, Ron N VelocityXLFG wrote:
> > >>>> I have a 72 dia prop on my XLFG I am going to try a 76 inch Dia
> > >>>> Ivo propeller and I am a little concerned with the clearance . 
> Seems
> > >>>> like I have plenty even with a high rotation angle. Is there any
> > >>>> other concerns or advice out there for this configuration.
> > >>>>
> > >>>> Ron
> > >>>> _______________________________________________
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> > >>>>
> > >>> If you do have ground contact, the blades are easily repairable or
> > >>> you can cut a little off the ends. My 220 HP Franklin uses a 68"
> > >>> IVO prop. 76" seems like a lot. What is the objective?
> > >>>
> > >>> John
> > >>> _______________________________________________
> > >>> To change your email address, visit
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> > >>
> > >> _______________________________________________
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> > >> Check new archives: www.tvbf.org/pipermail
> > >> Check old archives: 
> http://www.tvbf.org/archives/velocity/maillist.html
> > >>
> > >
> > > _______________________________________________
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> > >
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> > > Check old archives: 
> http://www.tvbf.org/archives/velocity/maillist.html
> >
> > _______________________________________________
> > To change your email address, visit 
> http://www.tvbf.org/mailman/listinfo/reflector
> >
> > Visit the gallery! www.tvbf.org/gallery
> > user:pw = tvbf:jamaicangoose
> > Check new archives: www.tvbf.org/pipermail
> > Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
>
> _______________________________________________
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>
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