WIX Archives
Re:Aircraft grounded from lack of 115/145
Posted by Jason Pence on Thu Oct 30, 2003 06:30:55 PM
In reply top Re:Aircraft grounded from lack of 115/145 posted by Larry Kraus on Thu Oct 30, 2003 04:46:55 PM
Larry: Thanks much! It appears that both my friend and I were incorrect (read:wrong!). This info is just what I was looking for, and I am grateful for your time.
Be safe up there..
Regards
Jason Pence
: A question was asked concerning R3350 Turbo Compound engin
: es operating on 100/130 or 100LL.I checked in our DC-7 Ope
: rations Manual to get the original 115/145 take-off power
: setting for Wright 972TC18DA2 engines.It shows for 3250 H.
: P. the setting is: 56.5" or 265 BMEP at 2900 RPM.With 100/
: 130,we're allowed (at sea level): 53" or 234 BMEP at 2900R
: PM for 2880 H.P. We also have an STC to use military equva
: lent engines from C-121/WV-2 Connies.We can use R3350-34,-
: 42,-91,or -93 engines.The -42 max. MAP is 51" and the -93
: max. MAP is 52" with 234 max. BMEP and 2900 RPM each.They
: must have a slightly different blower ratio.I'm not sure w
: hat the max. 115/145 MAP and BMEP were on the 972TC18EA se
: ries engines used on the DC-7C, but they are de-rated to t
: he same 2880 H.P. settings as the DA's.With 100/130 or 100
: LL,the DC-7 also must disable the high blower controls as
: well as deactivate the spark advance mechanism.On the ex-U
: nited DC-7 that I fly,the max. take-off weight was reduced
: from 122,200lb. to 113,800lb. and revised performance cha
: rts supplement the originals.Our airplanes are still Trans
: port Category rather than Restricted.As for 100LL,we cauti
: ously use the 100/130 settings and watch the head temps.