Today's Message Index:
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1. 06:27 AM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Hugh McKay)
2. 02:01 PM - Re: Bing Type 64 Carb. Idle Mixture Setting (Roger Lee)
3. 02:20 PM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Hugh McKay)
4. 06:19 PM - Re: Bing Type 64 Carb. Idle Mixture Setting (Roger Lee)
Message 1
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Roger,
I finally got around to flying yesterday. I flew the Allegro 2000 at WOT in
level flight. At WOT in level flight my speed was around 120 mph and
climbing. My rpms were very close to 5800, and if I would have continued at
WOT I am sure the rpms would have exceeded 5800, and the speed would have
exceeded 120 mph. However, I did not let the engine get to 5800. I backed
off the throttle to prevent reaching 5800. With WOT at take off and climb
out at 68 to 70 mph the rpm is at 5200.
Comments??
Hugh G. McKay III, P.E.
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
-----Original Message-----
From: Hugh McKay
Sent: Thursday, March 03, 2011 11:16 AM
Subject: Re: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting
<hgmckay@bellsouth.net>
Roger,
I never fly WOT while cruising. I will fly today and open her wide open and
check the rpm. I will let you know.
Hugh G. McKay III, P.E.
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
-----Original Message-----
From: Roger Lee
Sent: Thursday, March 03, 2011 11:00 AM
Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting
Hi Hugh,
With the rpm numbers you give sounds like you are little under propped. What
do you get at WOT flat and level? It sounds like you may be close to 5700
WOT? It won't hurt anything, but you'll loose a little cruise speed and fuel
economy.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=332635#332635
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Hi Hugh,
Way under propped for a ground adjustable for your type of aircraft. If it does
get to 5800+ rpm you may even be loosing climb. I would try and add more pitch
of at least 2 degrees, you may need a more like 2.5 degrees more pitch. Try
and get it around 5500-5550 WOT flat and level and then report back. It will have
better all around performance including fuel economy without sacrificing one
characteristic over the another. I have a friend on another forum with an Allegro
and we set his up for 5500 area and he loves it.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333372#333372
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Roger,
I assume you mean 5500 - 5550 rpm (static). Correct?
Hugh G. McKay III, P.E.
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
-----Original Message-----
From: Roger Lee
Sent: Wednesday, March 09, 2011 4:57 PM
Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting
Hi Hugh,
Way under propped for a ground adjustable for your type of aircraft. If it
does get to 5800+ rpm you may even be loosing climb. I would try and add
more pitch of at least 2 degrees, you may need a more like 2.5 degrees more
pitch. Try and get it around 5500-5550 WOT flat and level and then report
back. It will have better all around performance including fuel economy
without sacrificing one characteristic over the another. I have a friend on
another forum with an Allegro and we set his up for 5500 area and he loves
it.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333372#333372
Message 4
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| Subject: | Re: Bing Type 64 Carb. Idle Mixture Setting |
Hi Hugh,
5500-5550 WOT while you are flying flat and level at your average cruise altitude.
So add about 2.5 degrees pitch back into your prop. Then go fly. Go WOT flat
and Level for 30-60 seconds and see where it tops out at for rpm. If you need
to tweak it after that then it will be a very small adjustment, but 2.5 added
ought to be close.
You have the prop set in the general area so we don't really care about the static
any more. Static changes for all props and I only use static for the the
very first run on a prop that I have no experience with. Static is just to get
in the ballpark. WOT while flying is the only real way to get an accurate WOT
rpm.
Trust me, you'll like it.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333410#333410
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