Today's Message Index:
----------------------
1. 12:03 AM - Re: rotax 912UL (JC Propeller Design)
2. 02:33 AM - Re: rotax 912UL (Michel Verheughe)
3. 04:37 AM - Re: rotax 912UL (fox5flyer)
4. 07:25 AM - Re: rotax 912UL (JC Propeller Design)
5. 12:04 PM - Re: rotax 912UL (Michel Verheughe)
6. 03:56 PM - Re: rotax 912UL (JC Propeller Design)
7. 05:33 PM - 4-1200 floatplane for sale or trade for 7 (twoshads)
8. 06:17 PM - Re: rotax 912UL (Lynn Matteson)
9. 06:55 PM - 912UL (jeff puls)
10. 08:11 PM - Re: rotax 912UL (James Shumaker)
11. 11:47 PM - Re: rotax 912UL (Michel Verheughe)
Message 1
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Michel,
Hur hurtig er deres maskin med Jab'n?
(top speed WOT with Jabiru?)
Nabo
Jan
----- Original Message -----
From: "Michel Verheughe" <michel@online.no>
Sent: Wednesday, February 20, 2008 8:20 AM
Subject: Re: Kitfox-List: rotax 912UL
>
> On Feb 20, 2008, at 4:44 AM, RAY Gignac wrote:
>> I to have the 912 but the ULS and I have 16 degrees pitch on warp
>> drive prop and on the ground 5000rpm is all I get can't seem to get
>> more out of it!
>
> I can't say for the Rotax because I have a Jabiru but ... on-the-ground
> static Wide-Open-Throttle RPM, initial climb WOT RPM and level flight
> WOT RPM are three distinct things with quite a difference. Maybe Ray is
> right, Eric; 5,000 might be good enough.
>
> Cheers,
> Michel Verheughe
> Norway
> Kitfox 3 - Jabiru 2200
>
>
>
>
>
>
>
> __________ NOD32 2838 (20080131) Information __________
>
>
>
Message 2
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Hej Jan,
> From: JC Propeller Design [propellerdesign@tele2.se]
> Hur hurtig er deres maskin med Jab'n?
> (top speed WOT with Jabiru?)
The answer is: too fast! My model 3 has a Vne of 100 MPH and at level and WOT it
takes only seconds before reach it. The nominal max RPM of the Jabiru is 3,300
RPM but I have never seen it over 3,050, which is what I get for the few seconds
before reaching Vne. On initial climb at WOT, I read 2,900 RPM and static,
on the ground, about 2800 RPM. I usually cruise at 2,600 RPM and it gives me
about 85 MPH (72 knots), which is a nice and economical speed. My Jabiru propeller
has a pitch for cruise and not for sharp initial climb. But I fly from
a long runway and ... anyway, I am in the air in only a couple of hundred yards.
Vennlig hilsen,
Michel Verheughe
Norway
Kitfox 3 - Jabiru 2200
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Message 3
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Generally the inability to get past a certain rpm regardless of load is
breathing. Think of the NASCAR restrictor plates.
Has it ever gone past 5000 or is this a new phenomenon? Have you made
any changes to the engine or components during the rebuild? Different
air filters? Carb heat box? Who did the rebuild and have you consulted
with them?
Deke Morisse
Mikado Michigan
S5/Subaru/CAP 355+ TT
"The aim of an argument or discussion should not be victory, but
progress."
- Joseph Joubert
----- Original Message -----
From: Eric
To: kitfox-list@matronics.com
Sent: Tuesday, February 19, 2008 9:40 PM
Subject: Kitfox-List: rotax 912UL
Hi Folks,
after two years of rebuilding N58EW has been inspected and is
officially an airworthy aircraft. However, I cant get the Rotax 912 UL
above 5000rpm. First tried it with GSC prop with the pitch reduced down
to 15 deg.
Then I installed an IFA Ivo 3 blade prop, still only 5000rpm. So I
shortened it by 1" to 68" dia. , still only 5000rpm.
Any ideas?
thanks in advance
Eric Speedster N58EW
Message 4
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Michael,
Make sense.
2800/3300 =0,85% static
85 mph / 2600 * 3050 = 100 mph
3300 = 108 mph fictive top speed
Pitch 34,5" - 35"
You use 40 HP at 85MPH, 12,6 L/h??
Lige mde
Jan
----- Original Message -----
From: "Michel Verheughe" <michel@online.no>
Sent: Wednesday, February 20, 2008 11:29 AM
Subject: RE: Kitfox-List: rotax 912UL
> Hej Jan,
>
>> From: JC Propeller Design [propellerdesign@tele2.se]
>> Hur hurtig er deres maskin med Jab'n?
>> (top speed WOT with Jabiru?)
>
> The answer is: too fast! My model 3 has a Vne of 100 MPH and at level and
> WOT it takes only seconds before reach it. The nominal max RPM of the
> Jabiru is 3,300 RPM but I have never seen it over 3,050, which is what I
> get for the few seconds before reaching Vne. On initial climb at WOT, I
> read 2,900 RPM and static, on the ground, about 2800 RPM. I usually cruise
> at 2,600 RPM and it gives me about 85 MPH (72 knots), which is a nice and
> economical speed. My Jabiru propeller has a pitch for cruise and not for
> sharp initial climb. But I fly from a long runway and ... anyway, I am in
> the air in only a couple of hundred yards.
>
> Vennlig hilsen,
> Michel Verheughe
> Norway
> Kitfox 3 - Jabiru 2200
>
>
> <pre><b><font size=2 color="#000000" face="courier new,courier">
>
> href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronics.com/Navigator?Kitfox-List</a>
> href="http://forums.matronics.com">http://forums.matronics.com</a>
> href="http://www.matronics.com/contribution">http://www.matronics.com/contribution</a>
>
> </b></font></pre>
>
>
> __________ NOD32 2838 (20080131) Information __________
>
>
Message 5
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On Feb 20, 2008, at 4:22 PM, JC Propeller Design wrote:
> Pitch 34,5" - 35"
> You use 40 HP at 85MPH, 12,6 L/h??
The prop is a two-bladed fixed pitch Jabiru 60 by 28", Jan. For the
fuel, I am not very observant but from my trip to Belgium two years
ago, I reckon something like 13 liters per hour. I don't have the
economy kit for the carburettor, though. Not everybody is pleased with
it and ... I don't repair something that works.
Hej d,
Michel Verheughe
Norway
Kitfox 3 - Jabiru 2200
Message 6
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12,6 or 13 l/h is close enough, if you calc. in taxi and WOT climb also we
are right on.
Pitch sounds a bit low, but pitch is a relative norm (as is intelligence)
and depends on thickness of blade. Thick airfoil?
Jan
----- Original Message -----
From: "Michel Verheughe" <michel@online.no>
Sent: Wednesday, February 20, 2008 9:00 PM
Subject: Re: Kitfox-List: rotax 912UL
>
> On Feb 20, 2008, at 4:22 PM, JC Propeller Design wrote:
>> Pitch 34,5" - 35"
>> You use 40 HP at 85MPH, 12,6 L/h??
>
> The prop is a two-bladed fixed pitch Jabiru 60 by 28", Jan. For the fuel,
> I am not very observant but from my trip to Belgium two years ago, I
> reckon something like 13 liters per hour. I don't have the economy kit for
> the carburettor, though. Not everybody is pleased with it and ... I don't
> repair something that works.
>
> Hej d,
> Michel Verheughe
> Norway
> Kitfox 3 - Jabiru 2200
>
>
> __________ NOD32 2838 (20080131) Information __________
>
>
>
Message 7
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| Subject: | 4-1200 floatplane for sale or trade for 7 |
Kitfox 4 912 for sale or would like to trade for a unfinshed 7 but without the
floats
24000$ or ob plane is in NKY. May include floats on trade for the right project
---------------------------------
Never miss a thing. Make Yahoo your homepage.
Message 8
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Michel, did you hit the wrong key?....28"? I thought yours was closer
to 38".
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/475+ hrs
do not archive
On Feb 20, 2008, at 3:00 PM, Michel Verheughe wrote:
>
> On Feb 20, 2008, at 4:22 PM, JC Propeller Design wrote:
>> Pitch 34,5" - 35"
>> You use 40 HP at 85MPH, 12,6 L/h??
>
> The prop is a two-bladed fixed pitch Jabiru 60 by 28", Jan. For the
> fuel, I am not very observant but from my trip to Belgium two years
> ago, I reckon something like 13 liters per hour. I don't have the
> economy kit for the carburettor, though. Not everybody is pleased
> with it and ... I don't repair something that works.
>
> Hej d,
> Michel Verheughe
> Norway
> Kitfox 3 - Jabiru 2200
>
>
Message 9
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You should be running those big drum type air filters. Anything smaller
and you will not the RPM you desire. Jeff CMH
Message 10
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Eric
15 degrees can be a lot on a Warp drive prop, when measured at the tip. Warp drive
suggests flatenning the pitch until the desired rpm is acheived, static.
That is different for the taper tip and the full width tip. The taper tip is
generally set to redline at static. After acheiving the desired rpm then compare
to other pilots. I believe I am at about 8 degrees at the tip. If you have
trouble getting rpm then it could be the butterflies are not opening all the
way. Or the ducting to the carbs (if you have carb heat) could be restictive.
Jim Shumaker
Kitfox III, 912 UL
California
----- Original Message ----
From: Eric <iworonko@cox.net>
Sent: Tuesday, February 19, 2008 7:54:53 PM
Subject: Re: Kitfox-List: rotax 912UL
not the tach, I double checked it with two different optical tachs.
and the carbs are synchronized
Eric
Message 11
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> From: Lynn Matteson [lynnmatt@jps.net]
> Michel, did you hit the wrong key?....28"? I thought yours was closer
> to 38".
Oops! Yes, wrong key! It's 38 inches. Thanks for watching my steps, friend!
Cheers,
Michel Verheughe
Norway
Kitfox 3 - Jabiru 2200
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