REFLECTOR: Prop dia
Ron N VelocityXLFG
velocityxl at fastmail.fm
Thu Jun 6 11:14:25 CDT 2013
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
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>>
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>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
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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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