Propeller Cruise Pitch - Dec 2008

Last time I was flying, I was not able to move the propeller to cruise
pitch. It
required so much force that I was afraid to break a cable or the lever. After
trying several times I gave up.

======================================================

Date:         Thu, 4 Dec 2008 21:25:39 -0700
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         "Hermann F. Fasel" <faselh@EMAIL.ARIZONA.EDU>
Subject:      Propeller cruise pitch
In-Reply-To:  <LISTSERV%200812042228233070.825A@HOME.EASE.LSOFT.COM>
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Last time I was flying, I was not able to move the propeller to cruise
pitch. It
required so much force that I was afraid to break a cable or the lever. After
trying several times I gave up.
When checking it out on the ground I had no problem moving the lever
all the way
to the feather position and back.
Did anybody else experience this?

In the past, moving the propeller from takeoff to cruise always required a lot
more force than from cruise to takeoff. Is this the same for everybody else?

Thanks

Hermann


Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting Bruce Schimmel <bruce@SCHIMMEL.COM>:

> syncing my carbs tomorrow. is 2300 or 2200 the best rpm. thanks, b
=========================================================================
Date:         Thu, 4 Dec 2008 22:41:00 -0600
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         David McConeghey <mcconeghey@GMAIL.COM>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <20081204212539.manbfvgakgsssw4s@www.email.arizona.edu>
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Hermann,

What airspeed and RPM were you using.  Try reducing both airspeed and RPM
and see if it isn't easier.

Dave McConeghey
Cell Phone 316-409-9624
Home Phone 316-733-8777
mcconeghey@gmail.com
http://members.cox.net/motorglider

On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
<faselh@email.arizona.edu>wrote:

> Last time I was flying, I was not able to move the propeller to cruise
> pitch. It
> required so much force that I was afraid to break a cable or the lever.
> After
> trying several times I gave up.
> When checking it out on the ground I had no problem moving the lever all
> the way
> to the feather position and back.
> Did anybody else experience this?
>
> In the past, moving the propeller from takeoff to cruise always required a
> lot
> more force than from cruise to takeoff. Is this the same for everybody
> else?
>
> Thanks
>
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
=========================================================================
Date:         Thu, 4 Dec 2008 21:44:29 -0700
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         "Hermann F. Fasel" <faselh@EMAIL.ARIZONA.EDU>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <6ef836ff0812042041i41d45e0am66304657597393e3@mail.gmail.com>
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Dave,
thanks. I used 3800 as recommended, at about 60 kts. Try at lower than 3800?
Hermann


Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting David McConeghey <mcconeghey@GMAIL.COM>:

> Hermann,
>
> What airspeed and RPM were you using.  Try reducing both airspeed and RPM
> and see if it isn't easier.
>
> Dave McConeghey
> Cell Phone 316-409-9624
> Home Phone 316-733-8777
> mcconeghey@gmail.com
> http://members.cox.net/motorglider
>
> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
> <faselh@email.arizona.edu>wrote:
>
>> Last time I was flying, I was not able to move the propeller to cruise
>> pitch. It
>> required so much force that I was afraid to break a cable or the lever.
>> After
>> trying several times I gave up.
>> When checking it out on the ground I had no problem moving the lever all
>> the way
>> to the feather position and back.
>> Did anybody else experience this?
>>
>> In the past, moving the propeller from takeoff to cruise always required a
>> lot
>> more force than from cruise to takeoff. Is this the same for everybody
>> else?
>>
>> Thanks
>>
>> Hermann
>>
>>
>> Hermann F. Fasel
>> Aerospace & Mechanical Engineering
>> University of Arizona
>> Tucson, Arizona 85721
>>
>> Tel.: 520-621-2771
>> Fax: 520-621-8191
>>
=========================================================================
Date:         Thu, 4 Dec 2008 21:23:57 -0800
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Rob Morgan <ls-484@SBCGLOBAL.NET>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <20081204214429.pfivcbwvco40gcg0@www.email.arizona.edu>
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Hermann,
=A0
I have the 912S and the Hoffman prop with the mechanical lever.=A0 Have not=
 experienced any problems or high pressures in the lever arm when going bac=
k and forth between climb and cruise.=A0 Have always reduced rpm to recomme=
nded levels before changing the prop.
=A0
Rob

--- On Thu, 12/4/08, Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU> wrote:

From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
Subject: Re: Propeller cruise pitch
To: XIMANGO@HOME.EASE.LSOFT.COM
Date: Thursday, December 4, 2008, 8:44 PM

Dave,
thanks. I used 3800 as recommended, at about 60 kts. Try at lower than 3800=
?
Hermann


Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting David McConeghey <mcconeghey@GMAIL.COM>:

> Hermann,
>
> What airspeed and RPM were you using.  Try reducing both airspeed and RPM
> and see if it isn't easier.
>
> Dave McConeghey
> Cell Phone 316-409-9624
> Home Phone 316-733-8777
> mcconeghey@gmail.com
> http://members.cox.net/motorglider
>
> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
> <faselh@email.arizona.edu>wrote:
>
>> Last time I was flying, I was not able to move the propeller to cruise
>> pitch. It
>> required so much force that I was afraid to break a cable or the
lever.
>> After
>> trying several times I gave up.
>> When checking it out on the ground I had no problem moving the lever
all
>> the way
>> to the feather position and back.
>> Did anybody else experience this?
>>
>> In the past, moving the propeller from takeoff to cruise always
required a
>> lot
>> more force than from cruise to takeoff. Is this the same for everybody
>> else?
>>
>> Thanks
>>
>> Hermann
>>
>>
>> Hermann F. Fasel
>> Aerospace & Mechanical Engineering
>> University of Arizona
>> Tucson, Arizona 85721
>>
>> Tel.: 520-621-2771
>> Fax: 520-621-8191
>>
=========================================================================
Date:         Thu, 4 Dec 2008 22:40:30 -0700
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         "Hermann F. Fasel" <faselh@EMAIL.ARIZONA.EDU>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <956315.60523.qm@web83204.mail.mud.yahoo.com>
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Rob,
thanks. Do you need the same force on the lever going from climb/cruise as =
for
going from cruise/climb?
For my plane there was always a big difference! Much more force was always
required going from climb/cruise than for cruise/climb!

Hermann


Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting Rob Morgan <ls-484@SBCGLOBAL.NET>:

> Hermann,
> =A0
> I have the 912S and the Hoffman prop with the mechanical lever.=A0 Have
> not experienced any problems or high pressures in the lever arm when
> going back and forth between climb and cruise.=A0 Have always reduced
> rpm to recommended levels before changing the prop.
> =A0
> Rob
>
> --- On Thu, 12/4/08, Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU> wrote:
>
> From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
> Subject: Re: Propeller cruise pitch
> To: XIMANGO@HOME.EASE.LSOFT.COM
> Date: Thursday, December 4, 2008, 8:44 PM
>
> Dave,
> thanks. I used 3800 as recommended, at about 60 kts. Try at lower than 38=
00?
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
>
> Quoting David McConeghey <mcconeghey@GMAIL.COM>:
>
>> Hermann,
>>
>> What airspeed and RPM were you using.  Try reducing both airspeed and RP=
M
>> and see if it isn't easier.
>>
>> Dave McConeghey
>> Cell Phone 316-409-9624
>> Home Phone 316-733-8777
>> mcconeghey@gmail.com
>> http://members.cox.net/motorglider
>>
>> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
>> <faselh@email.arizona.edu>wrote:
>>
>>> Last time I was flying, I was not able to move the propeller to cruise
>>> pitch. It
>>> required so much force that I was afraid to break a cable or the
> lever.
>>> After
>>> trying several times I gave up.
>>> When checking it out on the ground I had no problem moving the lever
> all
>>> the way
>>> to the feather position and back.
>>> Did anybody else experience this?
>>>
>>> In the past, moving the propeller from takeoff to cruise always
> required a
>>> lot
>>> more force than from cruise to takeoff. Is this the same for everybody
>>> else?
>>>
>>> Thanks
>>>
>>> Hermann
>>>
>>>
>>> Hermann F. Fasel
>>> Aerospace & Mechanical Engineering
>>> University of Arizona
>>> Tucson, Arizona 85721
>>>
>>> Tel.: 520-621-2771
>>> Fax: 520-621-8191
>>>
=========================================================================
Date:         Fri, 5 Dec 2008 07:18:48 -0500
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Finbar Sheehy <finbarsheehy@YAHOO.COM>
Subject:      Re: Propeller cruise pitch
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset="iso-8859-1"

Hoffman prop? I had the same problem. Backed off airspeed and RPM until the=
 pitch change worked at 60kt/1700 rpm or so, well below the rpm in the manu=
al. At the lower speed/rpm, there is no problem.

-----Original Message-----
From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
Sent: Thursday, December 04, 2008 23:25
To: XIMANGO@HOME.EASE.LSOFT.COM
Subject: Propeller cruise pitch

Last time I was flying, I was not able to move the propeller to cruise=20
pitch. It
required so much force that I was afraid to break a cable or the lever. Aft=
er
trying several times I gave up.
When checking it out on the ground I had no problem moving the lever=20
all the way
to the feather position and back.
Did anybody else experience this?

In the past, moving the propeller from takeoff to cruise always required a =
lot
more force than from cruise to takeoff. Is this the same for everybody else=
?

Thanks

Hermann


Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting Bruce Schimmel <bruce@SCHIMMEL.COM>:

> syncing my carbs tomorrow. is 2300 or 2200 the best rpm. thanks, b
=========================================================================
Date:         Fri, 5 Dec 2008 07:11:40 -0500
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Michael Nagle <mnagle@VINEYARD.NET>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <20081204224030.bgjc3toiskwgosos@www.email.arizona.edu>
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Hi Hermann,
I have 200-047 - same force going from climb/cruise and cruise/climb - 
always go to 3800 and slow to 60 - force is not great.
Mike Nagle

On Dec 5, 2008, at 12:40 AM, Hermann F. Fasel wrote:

> Rob,
> thanks. Do you need the same force on the lever going from climb/
> cruise as for
> going from cruise/climb?
> For my plane there was always a big difference! Much more force was 
> always
> required going from climb/cruise than for cruise/climb!
>
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
>
> Quoting Rob Morgan <ls-484@SBCGLOBAL.NET>:
>
>> Hermann,
>>
>> I have the 912S and the Hoffman prop with the mechanical lever.  Have
>> not experienced any problems or high pressures in the lever arm when
>> going back and forth between climb and cruise.  Have always reduced
>> rpm to recommended levels before changing the prop.
>>
>> Rob
>>
>> --- On Thu, 12/4/08, Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU> 
>> wrote:
>>
>> From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
>> Subject: Re: Propeller cruise pitch
>> To: XIMANGO@HOME.EASE.LSOFT.COM
>> Date: Thursday, December 4, 2008, 8:44 PM
>>
>> Dave,
>> thanks. I used 3800 as recommended, at about 60 kts. Try at lower 
>> than 3800?
>> Hermann
>>
>>
>> Hermann F. Fasel
>> Aerospace & Mechanical Engineering
>> University of Arizona
>> Tucson, Arizona 85721
>>
>> Tel.: 520-621-2771
>> Fax: 520-621-8191
>>
>>
>> Quoting David McConeghey <mcconeghey@GMAIL.COM>:
>>
>>> Hermann,
>>>
>>> What airspeed and RPM were you using.  Try reducing both airspeed 
>>> and RPM
>>> and see if it isn't easier.
>>>
>>> Dave McConeghey
>>> Cell Phone 316-409-9624
>>> Home Phone 316-733-8777
>>> mcconeghey@gmail.com
>>> http://members.cox.net/motorglider
>>>
>>> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
>>> <faselh@email.arizona.edu>wrote:
>>>
>>>> Last time I was flying, I was not able to move the propeller to 
>>>> cruise
>>>> pitch. It
>>>> required so much force that I was afraid to break a cable or the
>> lever.
>>>> After
>>>> trying several times I gave up.
>>>> When checking it out on the ground I had no problem moving the 
>>>> lever
>> all
>>>> the way
>>>> to the feather position and back.
>>>> Did anybody else experience this?
>>>>
>>>> In the past, moving the propeller from takeoff to cruise always
>> required a
>>>> lot
>>>> more force than from cruise to takeoff. Is this the same for 
>>>> everybody
>>>> else?
>>>>
>>>> Thanks
>>>>
>>>> Hermann
>>>>
>>>>
>>>> Hermann F. Fasel
>>>> Aerospace & Mechanical Engineering
>>>> University of Arizona
>>>> Tucson, Arizona 85721
>>>>
>>>> Tel.: 520-621-2771
>>>> Fax: 520-621-8191
>>>>
>
=========================================================================
Date:         Fri, 5 Dec 2008 07:28:18 -0500
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Michael Nagle <mnagle@VINEYARD.NET>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <20081204224030.bgjc3toiskwgosos@www.email.arizona.edu>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
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Mime-Version: 1.0 (Apple Message framework v929.2)

Hi Hermann,
I have 200-047 - with a Hoffman prop - same force going from climb/
cruise and cruise/climb - always go to 3800 and slow to 60 - force is 
not great - I wouldn't call it excessive.
Mike Nagle
On Dec 5, 2008, at 12:40 AM, Hermann F. Fasel wrote:

> Rob,
> thanks. Do you need the same force on the lever going from climb/
> cruise as for
> going from cruise/climb?
> For my plane there was always a big difference! Much more force was 
> always
> required going from climb/cruise than for cruise/climb!
>
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
>
> Quoting Rob Morgan <ls-484@SBCGLOBAL.NET>:
>
>> Hermann,
>>
>> I have the 912S and the Hoffman prop with the mechanical lever.  Have
>> not experienced any problems or high pressures in the lever arm when
>> going back and forth between climb and cruise.  Have always reduced
>> rpm to recommended levels before changing the prop.
>>
>> Rob
>>
>> --- On Thu, 12/4/08, Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU> 
>> wrote:
>>
>> From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
>> Subject: Re: Propeller cruise pitch
>> To: XIMANGO@HOME.EASE.LSOFT.COM
>> Date: Thursday, December 4, 2008, 8:44 PM
>>
>> Dave,
>> thanks. I used 3800 as recommended, at about 60 kts. Try at lower 
>> than 3800?
>> Hermann
>>
>>
>> Hermann F. Fasel
>> Aerospace & Mechanical Engineering
>> University of Arizona
>> Tucson, Arizona 85721
>>
>> Tel.: 520-621-2771
>> Fax: 520-621-8191
>>
>>
>> Quoting David McConeghey <mcconeghey@GMAIL.COM>:
>>
>>> Hermann,
>>>
>>> What airspeed and RPM were you using.  Try reducing both airspeed 
>>> and RPM
>>> and see if it isn't easier.
>>>
>>> Dave McConeghey
>>> Cell Phone 316-409-9624
>>> Home Phone 316-733-8777
>>> mcconeghey@gmail.com
>>> http://members.cox.net/motorglider
>>>
>>> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
>>> <faselh@email.arizona.edu>wrote:
>>>
>>>> Last time I was flying, I was not able to move the propeller to 
>>>> cruise
>>>> pitch. It
>>>> required so much force that I was afraid to break a cable or the
>> lever.
>>>> After
>>>> trying several times I gave up.
>>>> When checking it out on the ground I had no problem moving the 
>>>> lever
>> all
>>>> the way
>>>> to the feather position and back.
>>>> Did anybody else experience this?
>>>>
>>>> In the past, moving the propeller from takeoff to cruise always
>> required a
>>>> lot
>>>> more force than from cruise to takeoff. Is this the same for 
>>>> everybody
>>>> else?
>>>>
>>>> Thanks
>>>>
>>>> Hermann
>>>>
>>>>
>>>> Hermann F. Fasel
>>>> Aerospace & Mechanical Engineering
>>>> University of Arizona
>>>> Tucson, Arizona 85721
>>>>
>>>> Tel.: 520-621-2771
>>>> Fax: 520-621-8191
>>>>
>
=========================================================================
Date:         Fri, 5 Dec 2008 09:49:31 -0600
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         David McConeghey <mcconeghey@GMAIL.COM>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <20081204214429.pfivcbwvco40gcg0@www.email.arizona.edu>
MIME-Version: 1.0
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Hermann,

The 3 position prop works on principles of aerodynamic and centrifugal
forces that are affected by engine power, airspeed, and RPM.  I have noticed
that changing from the climb (or takeoff) position to cruise position became
more difficult if not impossible at very high altitude (10 to 14,000 ft.)
even when I tried lower power settings and airspeeds.  Higher altitude
results in different forces due to higher true airspeed.  I don't have any
definitive data but I would explore variations of those settings and see
what it takes to get the right blade angle without tearing a muscle or
damaging the mechanism.

Dave

On Thu, Dec 4, 2008 at 10:44 PM, Hermann F. Fasel
<faselh@email.arizona.edu>wrote:

> Dave,
> thanks. I used 3800 as recommended, at about 60 kts. Try at lower than
> 3800?
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
>
> Quoting David McConeghey <mcconeghey@GMAIL.COM>:
>
>  Hermann,
>>
>> What airspeed and RPM were you using.  Try reducing both airspeed and RPM
>> and see if it isn't easier.
>>
>> Dave McConeghey
>> Cell Phone 316-409-9624
>> Home Phone 316-733-8777
>> mcconeghey@gmail.com
>> http://members.cox.net/motorglider
>>
>> On Thu, Dec 4, 2008 at 10:25 PM, Hermann F. Fasel
>> <faselh@email.arizona.edu>wrote:
>>
>>  Last time I was flying, I was not able to move the propeller to cruise
>>> pitch. It
>>> required so much force that I was afraid to break a cable or the lever.
>>> After
>>> trying several times I gave up.
>>> When checking it out on the ground I had no problem moving the lever all
>>> the way
>>> to the feather position and back.
>>> Did anybody else experience this?
>>>
>>> In the past, moving the propeller from takeoff to cruise always required
>>> a
>>> lot
>>> more force than from cruise to takeoff. Is this the same for everybody
>>> else?
>>>
>>> Thanks
>>>
>>> Hermann
>>>
>>>
>>> Hermann F. Fasel
>>> Aerospace & Mechanical Engineering
>>> University of Arizona
>>> Tucson, Arizona 85721
>>>
>>> Tel.: 520-621-2771
>>> Fax: 520-621-8191
>>>
>>>


--
Dave McConeghey
1507 W. Browning Ct.
Andover, KS 67002-7508
Cell Phone 316-409-9624
Home Phone 316-733-8777
mcconeghey@gmail.com
http://members.cox.net/motorglider
=========================================================================
Date:         Sat, 6 Dec 2008 20:47:33 -0700
Reply-To:     "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       "Ximango Owners Group (XOG)" <XIMANGO@HOME.EASE.LSOFT.COM>
From:         "Hermann F. Fasel" <faselh@EMAIL.ARIZONA.EDU>
Subject:      Re: Propeller cruise pitch
In-Reply-To:  <XIMANGO%200812050718563780.8867@HOME.EASE.LSOFT.COM>
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Thank you very much!
I tried that today and it worked!

Hermann

Hermann F. Fasel
Aerospace & Mechanical Engineering
University of Arizona
Tucson, Arizona 85721

Tel.: 520-621-2771
Fax: 520-621-8191


Quoting Finbar Sheehy <finbarsheehy@YAHOO.COM>:

> Hoffman prop? I had the same problem. Backed off airspeed and RPM
> until the pitch change worked at 60kt/1700 rpm or so, well below the
> rpm in the manual. At the lower speed/rpm, there is no problem.
>
> -----Original Message-----
> From: Hermann F. Fasel <faselh@EMAIL.ARIZONA.EDU>
> Sent: Thursday, December 04, 2008 23:25
> To: XIMANGO@HOME.EASE.LSOFT.COM
> Subject: Propeller cruise pitch
>
> Last time I was flying, I was not able to move the propeller to cruise
> pitch. It
> required so much force that I was afraid to break a cable or the lever. After
> trying several times I gave up.
> When checking it out on the ground I had no problem moving the lever
> all the way
> to the feather position and back.
> Did anybody else experience this?
>
> In the past, moving the propeller from takeoff to cruise always
> required a lot
> more force than from cruise to takeoff. Is this the same for everybody else?
>
> Thanks
>
> Hermann
>
>
> Hermann F. Fasel
> Aerospace & Mechanical Engineering
> University of Arizona
> Tucson, Arizona 85721
>
> Tel.: 520-621-2771
> Fax: 520-621-8191
>
>
> Quoting Bruce Schimmel <bruce@SCHIMMEL.COM>:
>
>> syncing my carbs tomorrow. is 2300 or 2200 the best rpm. thanks, b