Microlighters

Hello everyone

Can anybody please advise me on the following:

1) Minimum water temperature before take-off?
2) Maximum temperature that the water can rise to before you should start to get worried?

Thanks!

Smiley wrote:Hello everyone

Can anybody please advise me on the following:

1) Minimum water temperature before take-off?
2) Maximum temperature that the water can rise to before you should start to get worried?

Thanks!

Minumum 50 Deg Celsuis
Normal operating temp 80 Deg
Worrrie 90 Deg.

Cheers

Bennie Vorster wrote:

Smiley wrote:Hello everyone

Can anybody please advise me on the following:

1) Minimum water temperature before take-off?
2) Maximum temperature that the water can rise to before you should start to get worried?

Thanks!

Minumum 50 Deg Celsuis
Normal operating temp 80 Deg
Worrrie 90 Deg.

Cheers

Thanks for the quick reply and info!!

Bennie Vorster wrote:

Smiley wrote:Hello everyone

Can anybody please advise me on the following:

1) Minimum water temperature before take-off?
2) Maximum temperature that the water can rise to before you should start to get worried?

Thanks!

Minumum 50 Deg Celsuis
Normal operating temp 80 Deg
Worrrie 90 Deg.

Cheers

Hi Bennie,

Are you sure about these figures ?

This is what I got from the manual :

7. Coolant temperature on ROTAX 582 UL DCDI / mod. 99:
max. ............................................ 80 C ................... (175° F)
min. ............................................. 65 C ................... (150° F)

Fly safe,
Rudi

I've asked Amith to give me the figures, so here they are:

10)Operating parameters
1. Speed:
Take-off speed ......................................6800 RPM max. 5 min
Take-off speed at 582 UL DCDI 40 ......6400 RPM max. 5 min
cruising speed ......................................6500 RPM
cruising speed at 582 UL DCDI 40 ......6000 RPM
Idle speed .............................................ca. 2000 RPM
2. Take off Performance (ISA): (International Standard
Atmosphere)
02970
02971
02846
3. Oil capacity of oil injection lubrication at 1500 rpm pump
speed per outlet
4. Cylinder head temperature (reading at spark plug seat):
5. Exhaust gas temperatures:
447 UL SCDI 503 UL DCDI 582 UL DCDI mod. 99
29,5 kW 37 kW 40 kW 48 kW 48 kW
582 UL DCDI
cm3/h cu.in/h cm3/h cu.in/h
max. 192 11,7 max. 135 8,2
503 UL DCDI 582 UL DCDI / mod. 99
02972
dimension °C °F °C °F °C °F
max. 650 1200 650 1200
normal 460-580 860-1000 500-620 930-1150
difference between
cyl. 1 and 2 max. 25 43 max. 25 43
447 UL SCDI 503 UL DCDI 582 UL DCDI mod. 99
dimension °C °F °C °F °C °F
max. 260 500 250 480 150 300
normal 190-230 374-446 180-220 350 - 430 110 -130 230 - 270
difference between
cyl. 1 and 2
max.
20 36 max. 20 34 max. 10 16
447 UL SCDI 503 UL DCDI 582 UL DCDI / mod. 99
d04094
page 10 - 2
Jan. 01/2007
Effectivity: 447 SCDI, 503 DCDI,
582 DCDI
OM Edition 1 / Rev. 0
BRP-Rotax
6. Engine start, operating temperature:
max. ............................................ 50 °C ................... (120° F)
min. ............................................. - 25 °C................... (- 13° F)
7. Coolant temperature on ROTAX 582 UL DCDI / mod. 99:
max. ............................................ 80 °C ................... (175° F)
min. ............................................. 65 °C ................... (150° F)
8. Fuel pressure:
max. ............................................ 0,4 bar ................ (6 psi)
min. ............................................. 0,2 bar ................ (3 psi)

Yuck that formatting Sucks... my eyes go squint and I still can't figure some of it out...

RudiGreyling wrote:Yuck that formatting Sucks... my eyes go squint and I still can't figure some of it out...

Then RTFM.......

and ............... here's the manual:
http://www.rotax-aircraft-engines.com/p ... d00286.pdf

Maintenance manual here:
http://www.pipistrel.si/files/maintenan ... l%202T.pdf

Hi Smiley, warm-up to 60C (5min), in the cruise it is steady at 70C, do not exceed 80C

cobra wrote:Hi Smiley, warm-up to 60C (5min), in the cruise it is steady at 70C, do not exceed 80C

Agreed - not below 60° C and not above 80° C – I cruise at 65° C.

Regards
John ZU-CIB

cobra wrote:Hi Smiley, warm-up to 60C (5min), in the cruise it is steady at 70C, do not exceed 80C

Thanks Sias

I've taken up a passenger the other day and the water temperature was about 80.

That was in normal cruise at about 6000rpm...! I think a big passenger spoils the airflow over the radiotors....?

This was a big oke!

The cruise rpm sound = 80C

KYK (Wing Spirit 15) cruises at 5000 rpm 70C 12 l/h 55mph and 2 up 5300 70C 13 l/h

cobra wrote:The cruise rpm sound = 80C

KYK (Wing Spirit 15) cruises at 5000 rpm 70C 12 l/h 55mph and 2 up 5300 70C 13 l/h

One up: 5800 rpm

My 3 bladed prop has a small diameter.

The Gemini keeltube comes about 500mm passed the prop. This causes the wires from the trapisium bar to the keeltube at the back to go low over the prop, hense you cannot swing large props

Hello Smiley!
If you start to lose coolant, fit a new (higher pressure spec ;-) radiator cap.) If you still lose coolant on max climb, then start to worry.
Engines work more efficient and cleaner at higher temps.
I ran my old Rattex 532 with the small radiators hot and lean all of its 660 hours and only retired it when the ignition started failing.
Is your thermometer calibrated? Dunk the probe in boiling water and see if you get 100 deg (say 90 deg at reef altitude)
Radiator pressure should still keep it from boiling below 115 deg or so.
Fill with DISTILLED water and GLYCOL antifreeze 50/50.
Fly, man, do not worry about things that do not give off smoke!
FlySafe!
Abe

Fly, man, do not worry about things that do not give off smoke!
FlySafe!
Abe