|
|
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
<< Lancair Builders' Mail List >>
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
I have heard much opinion and folklore about recommended leaning for the
TSIO550-E1B
so I have some data to present and request similar data from other LNC4
owners to see if these
numbers are typical for a engine with more than 50 hours. (This one has
65 hours TT)
Based on discussions with Orin at Lancair during my IV checkout and from
reading the book
EGT Systems from Light Plane maintenance the following guidelines were
established.
Maximum EGT/TIT: 1550F for any RPM/MAN setting.
Minimum RPM: 2500 with Manifold Press. > 30"
The following data was taken at 65% power with a Vision Micro Systems
engine monitoring system.
RPM: 2400
MAN: 28.5"
OAT: -8C
ALT: 17500ft
20.7 GPH (Rich of Peak) 15.3v GPH (Lean of Peak)
EGT1 1518 F 1544 F
EGT2 1564 1564
EGT3 1518 1552
EGT4 1530 1515
EGT5 1454 1508
EGT6 1462 1478
CHT1 322 294
CHT2 328 285
CHT3 308 278
CHT4 332 278
CHT5 332 298
CHT6 332 278
Air Speed Data from Shadin air data computer.
TAS 262 Kts 245 Kts.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
RPM: 2400
MAN: 28.2"
OAT: -30C
ALT: 25000ft
21.2 GPH (Rich of Peak) 15.0v GPH (Lean of Peak)
EGT1 1515 1526
EGT2 1552 1564
EGT3 1515 1536
EGT4 1524 1508
EGT5 1440 1490
EGT6 1460 1478
CHT1 336 270
CHT2 344 270
CHT3 324 270
CHT4 336 260
CHT5 344 288
CHT6 330 270
Air Speed Data from Shadin air data computer.
TAS 296 Kts 273 Kts.
This date has been found to be very typical of the engine at this time
with the EGT/TIT limitations listed above. The EGT temperatures have
been found to be the limiting case and not the TIT. The maximum TIT is
typically the same or less than the maximum EGT on cylinder #2 at the
65% power setting. The minimum power setting normally used is 65%.
Theo Mulder.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
|
|