Today's Message Index:
----------------------
1. 12:34 PM - Throttle Operation (Hugh McKay)
2. 12:41 PM - Re: Throttle Operation (brad@vision-technology.com)
3. 01:06 PM - Re: Throttle Operation (Hugh McKay)
4. 01:17 PM - Re: Throttle Operation (brad@vision-technology.com)
5. 03:59 PM - Re: Throttle Operation (Hugh McKay)
6. 04:37 PM - Re: Throttle Operation (Jerry Goldberg)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Throttle Operation |
I have an Allegro 2000 using a Rotax 912 UL engine with 725 hours
operation. I am now finding that while flying the airplane the throttle
lever return springs (i.e. the springs that are connected to the
throttle lever on the carburetors on the engine is pulling my throttle
towards the open position. In other words I have to constantly hold the
throttle control in the cockpit to keep it from migrating towards the
full open position. I understand why there is a spring on the carbs. It
is to pull the carbs to full open position in case of a throttle cable
break. But in my case, if I am flying and take my hand off the Allegro
cockpit throttle control, the springs on both carbs will pull the
throttle further in the open position.
I have never had this problem before. It appears that after 700+ hours
of operation there is not enough frictional resistance in the throttle
cable sheaths to hold the cable in position, or there is not enough
frictional resistance in the mechanical throttle arrangement on the
Allegro 2000 to hold a set throttle position. Has any one had this
problem with the Allegro 2000, 912 UL engine arrangement? Comments and
suggestions would be appreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Throttle Operation |
Hi Hugh,
On the rod that connects the throttle handles to each other there is a ny
lon bushing (between the seats). The metal cap that holds that bushing do
wn may be loose or the bushing is cracked. (mine is cracked and I haven't
searched for a replacement yet, but I was able to get plenty of friction
by just tightening the bolts a bit).
Brad Kramer
N221FA - Mandan ND
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 02:34 PM
Subject: Allegro-List: Throttle Operation
I have an Allegro 2000 using a Rotax 912 UL engine with 725 hours operati
on. I am now finding that while flying the airplane the throttle lever re
turn springs (i.e. the springs that are connected to the throttle lever o
n the carburetors on the engine is pulling my throttle towards the open p
osition. In other words I have to constantly hold the throttle control in
the cockpit to keep it from migrating towards the full open position. I
understand why there is a spring on the carbs. It is to pull the carbs to
full open position in case of a throttle cable break. But in my case, if
I am flying and take my hand off the Allegro cockpit throttle control, t
he springs on both carbs will pull the throttle further in the open posit
ion.
I have never had this problem before. It appears that after 700+ hours of
operation there is not enough frictional resistance in the throttle cabl
e sheaths to hold the cable in position, or there is not enough frictiona
l resistance in the mechanical throttle arrangement on the Allegro 2000 t
o hold a set throttle position. Has any one had this problem with the All
egro 2000, 912 UL engine arrangement? Comments and suggestions would be a
ppreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Throttle Operation |
Thanks Brad. I will check this bushing to see if that is the problem.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
From: brad@vision-technology.com
Sent: Tuesday, November 17, 2015 3:40 PM
Subject: Re: Allegro-List: Throttle Operation
Hi Hugh,
On the rod that connects the throttle handles to each other there is a
nylon bushing (between the seats). The metal cap that holds that bushing
down may be loose or the bushing is cracked. (mine is cracked and I
haven't searched for a replacement yet, but I was able to get plenty of
friction by just tightening the bolts a bit).
Brad Kramer
N221FA - Mandan ND
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 02:34 PM
To: allegro-list@matronics.com
Subject: Allegro-List: Throttle Operation
I have an Allegro 2000 using a Rotax 912 UL engine with 725
hours operation. I am now finding that while flying the airplane the
throttle lever return springs (i.e. the springs that are connected to
the throttle lever on the carburetors on the engine is pulling my
throttle towards the open position. In other words I have to constantly
hold the throttle control in the cockpit to keep it from migrating
towards the full open position. I understand why there is a spring on
the carbs. It is to pull the carbs to full open position in case of a
throttle cable break. But in my case, if I am flying and take my hand
off the Allegro cockpit throttle control, the springs on both carbs will
pull the throttle further in the open position.
I have never had this problem before. It appears that after 700+
hours of operation there is not enough frictional resistance in the
throttle cable sheaths to hold the cable in position, or there is not
enough frictional resistance in the mechanical throttle arrangement on
the Allegro 2000 to hold a set throttle position. Has any one had this
problem with the Allegro 2000, 912 UL engine arrangement? Comments and
suggestions would be appreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Throttle Operation |
If you happen to find a source / part # let me know. I'd think it is a co
mmon part.
thanks
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 03:06 PM
Subject: Re: Allegro-List: Throttle Operation
Thanks Brad. I will check this bushing to see if that is the problem.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
From:brad@vision-technology.com
Sent: Tuesday, November 17, 2015 3:40 PM
To:allegro-list@matronics.com
Subject: Re: Allegro-List: Throttle Operation
Hi Hugh,
On the rod that connects the throttle handles to each other there is a ny
lon bushing (between the seats). The metal cap that holds that bushing do
wn may be loose or the bushing is cracked. (mine is cracked and I haven't
searched for a replacement yet, but I was able to get plenty of friction
by just tightening the bolts a bit).
Brad Kramer
N221FA - Mandan ND
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 02:34 PM
Subject: Allegro-List: Throttle Operation
I have an Allegro 2000 using a Rotax 912 UL engine with 725 hours operati
on. I am now finding that while flying the airplane the throttle lever re
turn springs (i.e. the springs that are connected to the throttle lever o
n the carburetors on the engine is pulling my throttle towards the open p
osition. In other words I have to constantly hold the throttle control in
the cockpit to keep it from migrating towards the full open position. I
understand why there is a spring on the carbs. It is to pull the carbs to
full open position in case of a throttle cable break. But in my case, if
I am flying and take my hand off the Allegro cockpit throttle control, t
he springs on both carbs will pull the throttle further in the open posit
ion.
I have never had this problem before. It appears that after 700+ hours of
operation there is not enough frictional resistance in the throttle cabl
e sheaths to hold the cable in position, or there is not enough frictiona
l resistance in the mechanical throttle arrangement on the Allegro 2000 t
o hold a set throttle position. Has any one had this problem with the All
egro 2000, 912 UL engine arrangement? Comments and suggestions would be a
ppreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Throttle Operation |
Will do.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
From: brad@vision-technology.com
Sent: Tuesday, November 17, 2015 4:17 PM
Subject: Re: Allegro-List: Throttle Operation
If you happen to find a source / part # let me know. I'd think it is a
common part.
thanks
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 03:06 PM
To: allegro-list@matronics.com
Subject: Re: Allegro-List: Throttle Operation
Thanks Brad. I will check this bushing to see if that is the
problem.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
From: brad@vision-technology.com
Sent: Tuesday, November 17, 2015 3:40 PM
To: allegro-list@matronics.com
Subject: Re: Allegro-List: Throttle Operation
Hi Hugh,
On the rod that connects the throttle handles to each other
there is a nylon bushing (between the seats). The metal cap that holds
that bushing down may be loose or the bushing is cracked. (mine is
cracked and I haven't searched for a replacement yet, but I was able to
get plenty of friction by just tightening the bolts a bit).
Brad Kramer
N221FA - Mandan ND
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 02:34 PM
To: allegro-list@matronics.com
Subject: Allegro-List: Throttle Operation
I have an Allegro 2000 using a Rotax 912 UL engine with
725 hours operation. I am now finding that while flying the airplane the
throttle lever return springs (i.e. the springs that are connected to
the throttle lever on the carburetors on the engine is pulling my
throttle towards the open position. In other words I have to constantly
hold the throttle control in the cockpit to keep it from migrating
towards the full open position. I understand why there is a spring on
the carbs. It is to pull the carbs to full open position in case of a
throttle cable break. But in my case, if I am flying and take my hand
off the Allegro cockpit throttle control, the springs on both carbs will
pull the throttle further in the open position.
I have never had this problem before. It appears that
after 700+ hours of operation there is not enough frictional resistance
in the throttle cable sheaths to hold the cable in position, or there is
not enough frictional resistance in the mechanical throttle arrangement
on the Allegro 2000 to hold a set throttle position. Has any one had
this problem with the Allegro 2000, 912 UL engine arrangement? Comments
and suggestions would be appreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
http://www.wwegeo.com
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Throttle Operation |
Hey Hugh,
Is the part available from Doug at Allegro?
Jerry Goldberg
N44456
Covey Trails (X09)
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of Hugh McKay
Sent: Tuesday, November 17, 2015 5:59 PM
Subject: Re: Allegro-List: Throttle Operation
Will do.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net <mailto:hgmckay@bellsouth.net>
http://www.wwegeo.com
From: brad@vision-technology.com <mailto:brad@vision-technology.com>
Sent: Tuesday, November 17, 2015 4:17 PM
Subject: Re: Allegro-List: Throttle Operation
If you happen to find a source / part # let me know. I'd think it is a
common part.
thanks
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 03:06 PM
Subject: Re: Allegro-List: Throttle Operation
Thanks Brad. I will check this bushing to see if that is the problem.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net <mailto:hgmckay@bellsouth.net>
http://www.wwegeo.com
From: brad@vision-technology.com <mailto:brad@vision-technology.com>
Sent: Tuesday, November 17, 2015 3:40 PM
Subject: Re: Allegro-List: Throttle Operation
Hi Hugh,
On the rod that connects the throttle handles to each other there is a nylon
bushing (between the seats). The metal cap that holds that bushing down may
be loose or the bushing is cracked. (mine is cracked and I haven't searched
for a replacement yet, but I was able to get plenty of friction by just
tightening the bolts a bit).
Brad Kramer
N221FA - Mandan ND
-----Original Message-----
From: Hugh McKay [mailto:hgmckay@bellsouth.net]
Sent: Tuesday, November 17, 2015 02:34 PM
Subject: Allegro-List: Throttle Operation
I have an Allegro 2000 using a Rotax 912 UL engine with 725 hours operation.
I am now finding that while flying the airplane the throttle lever return
springs (i.e. the springs that are connected to the throttle lever on the
carburetors on the engine is pulling my throttle towards the open position.
In other words I have to constantly hold the throttle control in the cockpit
to keep it from migrating towards the full open position. I understand why
there is a spring on the carbs. It is to pull the carbs to full open
position in case of a throttle cable break. But in my case, if I am flying
and take my hand off the Allegro cockpit throttle control, the springs on
both carbs will pull the throttle further in the open position.
I have never had this problem before. It appears that after 700+ hours of
operation there is not enough frictional resistance in the throttle cable
sheaths to hold the cable in position, or there is not enough frictional
resistance in the mechanical throttle arrangement on the Allegro 2000 to
hold a set throttle position. Has any one had this problem with the Allegro
2000, 912 UL engine arrangement? Comments and suggestions would be
appreciated.
Hugh G. McKay III, P.E. Fellow, L.M. ASCE
Senior Consultant
Worldwide Engineering Inc.
4090 North NC Hwy. 16
Denver, NC 28037
Allegro 2000, Rotax 912 UL Engine, 725 hours
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net <mailto:hgmckay@bellsouth.net>
http://www.wwegeo.com
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|