Today's Message Index:
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1. 03:42 AM - Re: Wheel Bearing Inspection/Lubrication (Thom Riddle)
2. 03:52 AM - Re: Maximum Take-off Weight? (Thom Riddle)
3. 05:53 AM - Re: Wheel Bearing Inspection/Lubrication (Roger Lee)
4. 01:34 PM - Take-off Distance for Allegro 2000 ()
Message 1
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| Subject: | Re: Wheel Bearing Inspection/Lubrication |
Hugh,
The wheel bearings on the Allegro are sealed and need no periodic cleaning and
greasing. In about 600 hours of service on our Allegro, so far, they have performed
well with no complaint and no service. During annual inspections, we examine
the wheel carefully for cracks etc and spin it to see if there is any drag
in the bearing but that is about it.
--------
Thom Riddle
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Scratch any cynic, he said, and youll find a disappointed idealist.
George Carlin
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=195705#195705
Message 2
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| Subject: | Re: Maximum Take-off Weight? |
Hugh,
The Allegro 2000 was initially built for the European market which has a MTOW limit
of 520 kg (1144 lb) for that class of aircraft, or at least it did at the
time. I believe they are considering increasing that limit. When approved for
S-LSA in the USA the MTOW was raised to 1232 lb for Allegro 2000s sold in the
USA. The newer 2007 model has a heavier empty weight with wider and slightly
taller cabin and larger tail. The MTOW for the 2007 model is 1320 lb.
The MTOW for your Allegro 2000 built as an E-LSA has an MTOW of 1232 lb.
Note that the load limit specifications for the European MTOW of 1144 lb is +4g
-2g. At MTOW of 1232 lb. the load limits will be +3.71 and -1.85
--------
Thom Riddle
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Scratch any cynic, he said, and youll find a disappointed idealist.
George Carlin
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=195706#195706
Message 3
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| Subject: | Re: Wheel Bearing Inspection/Lubrication |
Hi Hugh,
There are 1 or 2 little checks you should do. Jack one side up so the wheel is
off the ground just a little and see if you can detect any wobble or odd noise
from the wheel or the brakes. When wheels have some time on them the axial nut
may need to be adjusted, usually a little tighter. See if the wheel turns freely
or is it hanging up slightly or is there any movement from side to side.
If you have standard straight ball bearing type wheel or tapered roller bearings.
If you have the tapered roller bearing the wheel should only spin once around
when you try to spin it. If it's the straight roller bearing type then it
should spin freely several times.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=195722#195722
Message 4
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| Subject: | Take-off Distance for Allegro 2000 |
Gentlemen:
I have a rather convoluted question concerning Density Altitude and take off
run for the Allegro 2000. I am well aware of the influence of high altitude
and hot humid days on takeoff run length (i.e. high elevation + hot temp. +
high humidity = long take off runs. However, with the specific information
given below, I cannot complete calculating the rate of climb and the
approximate take-off distance required for the Allegro 2000 to clear a 50
foot obstacle for the specific set of circumstances given below.
(Field conditions)
Elevation - 1025 msl
Runway - Grass
Length = 2000 feet
Temp. - 95 degrees F, (35 degrees C)
Relative Humidity - 70%
Dew Pt. - 77 Degrees F
Barometer - 29.89 " Hg
Condition of Aircraft (Allegro 2000)
MTOW - 1232 lbs. (560 Kg.)
Empty Wt - 727.5 lbs. (includes BRS System)
Max. Fuel Load - 153 lbs. (main and wing tanks full)
Pilot - 155 lbs.
Passenger - 180 lbs.
Luggage - 16.5 lbs.
Actual TOW = 1232 lbs
C.G. = 12.6" behind the leading edge of wing
Standard Temperature, Pressure Altitude, and Density Altitude
For the above conditions I calculate the following values:
Std. Temp. = 12.95 degrees C
Pressure Altitude = 1055 Ft. msl
Density Altitude = 3260 Ft. msl
Standard Temperature Sea Level Take-off Distance for the Allegro 2000 at
MTOW
With all this information I could use the Kotch Chart for Altitude and
Temperature Effects on take-off distance, and Effect on rate of climb. What
I don't have is the standard temperature sea level take-off distance to
climb to 50 feet for the Allegro 2000 at MTOW 560 Kg (1320 lbs.), and the
normal sea level rate of climb for the Allegro 2000 at this MTOW. Pages 28
and 29 of my Allegro 2000 Flight and Operating Manual gives some performance
numbers, but they are for test flights made at the Pisek air field El. 1351
Ft and at an air temperature of 27 degrees C. The standard temperature sea
level take-off distance given on page 29 of the manual is for a MTOW of 520
Kg, not 560 Kg. This is either a typo or it is indeed for 520 Kg.
I need to know the Standard Temperature Sea level Take-off Distance for the
Allegro 2000 to clear a 50 foot obstacle at MTOW of 560 Kg., and c.g. at
12.6" behind the leading edge of the wing. I also need to know the normal
sea level rate of climb for the Allegro 2000 at MTOW of 560 Kg., and c.g. at
12.6" behind the leading edge of the wing. I have contacted the US
Distributor to get this information but have not heard from him yet. Can any
of you who own an Allegro 2000 provide these two bits of information?
With kind regards,
Hugh McKay
Allegro 2000
Rotax 912 UL
N661WW
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