C-97 Still Losing Engines!

[Terry Carraway]

Terry, other than the engine swallowing great quantities of oil quickly, and EOP going down (EOP stair stepping down happened first, quickly followed by oil quantity dropping, fairly linearly. Feathering was iniatiated shortly thereafter) I have no idea what broke/let go first.

I told Tim that when we swap engines, I'm taking the shelled out one home for some "forensic investigation " . Luckily I have wreckers, to get 5,000 lbs of engine into my basement

I'm also contemplating a "Reno style fundraiser". So much for a piston, so much for an empty cylinder.... but I *really* want to know what shelled first and how to prevent it going forward.

Best
Jase

Yeap, figure out what went wrong, and how to add a sensor to tell you that it is happening.

How about Go Fund Me?

[Russell Holton]

I told Tim that when we swap engines, I'm taking the shelled out one home for some "forensic investigation " . Luckily I have wreckers, to get 5,000 lbs of engine into my basement

.... but I *really* want to know what shelled first and how to prevent it going forward.

Atta boy! Go for it! (We want pictures.)

[Jase Pence]

Chuckls, recalling that a few new F/Es used to just stare in amazement at that magneto selector - try'n to remember, what was it, four mags each engine?

At any rate, "good ole daze",

best, randy

Ours, the -59B, has four mags per engine. The earlier ones (such as on the Hughes HK-4 Spruce Goose) had 7 mags per engine. <evil evil grin> These are *my* good ole daze Randy!!

Best
Jase

[Randy Sohn]

truly a "corncob" engine ...

Chuckls, recalling that a few new F/Es used to just stare in amazement at that magneto selector - try'n to remember, what was it, four mags each engine?

At any rate, "good ole daze",

best, randy

[Jeff Hartmann]

I want you to know, Jeff, that this picture has given me nightmares... cold sweats.... and possibly a plague of locusts in the garden!! Geeezo Pete. "If 28 cylinders are good, 56 must be great!!"

Did it actually run or was it an empty mockup for giggles?

Best
Jase

I have no idea if it ran, or was intended to run, made me grin ... it is truly a "corncob" engine ...

[Randy Sohn]

I told Tim that

Chuckle, tell'im "Hi" from me and I always thought that the R-2000s were much more reliable. Chuckle1

best, randy

[Jase Pence]

Saw this at Reno last year....

As soon as we get the rocker covers on we'll be ready to run. (remember the IO-720 lycoming was 2 1O-360s so why not 2 4360s)

I want you to know, Jeff, that this picture has given me nightmares... cold sweats.... and possibly a plague of locusts in the garden!! Geeezo Pete. "If 28 cylinders are good, 56 must be great!!"

Did it actually run or was it an empty mockup for giggles?

Best
Jase

[Jase Pence]

What is/was the failure mode of the scavenge pump?

Maybe a chip detector down stream of each one to see the bits starting to come off.

Terry, other than the engine swallowing great quantities of oil quickly, and EOP going down (EOP stair stepping down happened first, quickly followed by oil quantity dropping, fairly linearly. Feathering was iniatiated shortly thereafter) I have no idea what broke/let go first.

I told Tim that when we swap engines, I'm taking the shelled out one home for some "forensic investigation " . Luckily I have wreckers, to get 5,000 lbs of engine into my basement

I'm also contemplating a "Reno style fundraiser". So much for a piston, so much for an empty cylinder.... but I *really* want to know what shelled first and how to prevent it going forward.

Best
Jase

[Terry Carraway]

What is/was the failure mode of the scavenge pump?

Maybe a chip detector down stream of each one to see the bits starting to come off.

[Randy Sohn]

my -1 for ours sez........per hour per engine

Ho-boy, mucho gracias, all my -1s for the As, Ds, Fs and Gs have "gone west" somewhere, used to have them and now I know why! Anyhow, guess that I never had seen it written down so I really dunno, only heard it pronouned. 56 gallons rings a bell with me. Our Gs had been tankers somewhere before we got them at the MN ANG and while on active duty during the Berlin crisus I'd been sent down to the ANG unit at Savannah once for several months to instruct and that's where I flew the Fs. Spent a lotta time flying and instructing and examining in them but just never thought any more about it.

best, randy

[Jase Pence]

Randy, could your G rotor pump be "gerotor pump"?

http://www.pumpschool.com/principles/gerotor.asp

Getting into the engine manuals here, there's 2 oil pumps, front and rear. The front has 1 pressure compartment and 2 scavenge compartments. Rear pump has 2 pressure compartments and 3 scavenge compartments. Still looking for a picture of one of these creatures, but good grief!! Well hell, everything *else* on the engine is huge....why shouldn't the oil pumps (!!) be proportional?!??

Best
Jase

[Jase Pence]

Try'na recall now what we had in each oil tank on the 97s - 35 gals.? Anyone remember/know?

best, randy

Randy, my -1 for ours sez 32.5 gallon capacity, with 7 gallon expansion room for the nacelle tanks. We have 2 fuselage tanks, each holds 56 gallons with 2 gallon expansion room. There's a 7gpm pump that transfers oil from each fuselage tank (one pump per tank) to any of the nacelle tanks in flight. So, total tank age capacity is 242 gallons if everything is full to the scuppers. I'm told that on long trips, they used to carry an extra barrel or two to replenish the fuse tanks. According to Pratt's engine manual, *accepted consumption* is 1.5 to 4 gallons of oil per hour per engine.

best
jase

[Randy Sohn]

suspect it was more

Just can't recall for sure now, tho I did forget to mention the spare oil tank we had down in the "hellhole" beneath the cockpit's floor. IIRC, it had an 80/90/135/?? gallon capacity that the F/E could tranfer/pump to any engine via a selector switch on his panel.

Longest leg I ever flew was one from London to Goose via Stephenville (Harmon), 15+45 IIRC, deadheaded over to Mildenhall, England to get and return one that Bobby had left over there for an engine change. IIRC again, it was 48-0607 ("Sick-ole-seven" we always called it).

best, randy

[Bruce Gorrell]

Try'na recall now what we had in each oil tank on the 97s - 35 gals.? Anyone remember/know?

best, randy

I suspect it was more than that. We have 40 a side with only 2/3 of the cylinders. And MUCH less range.

[Randy Sohn]

(23 gallons lost in 90 seconds

Try'na recall now what we had in each oil tank on the 97s - 35 gals.? Anyone remember/know?

best, randy