Lop

Re: Lop

neald said:
Has anyone ever successfully run LOP on the 112 HotShot?
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Egads.. y'all have some horrible ADD.

Based on the responses I have seen to appears that no one has yet been successful in LOP on a 112 Hotshot.

Cheers,
Neal
 
Re: Lop

stop14 said:
My 114B simply will not run LOP!
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Clyde,

If you were to fill in the rest of your profile with your location, home airport, and so on, then I'm sure Scott could stop in during his travels to demo the technique for you.

(Am I the only one that recognizes the irony of me telling folks to fill in their profile data? :))
 
Re: Lop

FS said:
(Am I the only one that recognizes the irony of me telling folks to fill in their profile data? :))
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If you can hold a 2nd class medical, then you can certainly find Frank's profile data. Otherwise, questionable. :D
 
Re: Lop

N4843W said:
There is no way in God's Blue Sky that losing a cylinder every 200 hours (x4) is due to LOP operation. Paul, you reminded me of my Grandpa who always put tubes in his tubeless tires and smoked straight Camels cuz there was something in those damn filters that will give you cancer !!!!
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Kinder, gentler, now... ;-)
 
Re: Lop

Frank, Scott knows where I live. MY profile was there at one point, don't know where it went though. Loc, DHN, sn 14664. 114B , great plane, operating this plane since 2001, almost through my second engine. But this A&P, I.A. Can't get it to run LOP.
Come on down Scott, show me!
I don't know why my profile gets erased!
 
Re: Lop

sN14664..That was my 114B. A very nice plane...was on the cover of "plane and pilot" magazine....glad it got a great home!
 
Re: Lop

stop14 said:
Frank, Scott knows where I live. MY profile was there at one point, don't know where it went though. Loc, DHN, sn 14664. 114B , great plane, operating this plane since 2001, almost through my second engine. But this A&P, I.A. Can't get it to run LOP.
Come on down Scott, show me!
I don't know why my profile gets erased!
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Cllyde ... email me direct to scott@truen.com. If your 114 won't run LOP, then there is a reason, most likely you have a huge spread in your CHTs. That is entirely possible.
 
Re: Lop

FS said:
Clyde,

If you were to fill in the rest of your profile with your location, home airport, and so on, then I'm sure Scott could stop in during his travels to demo the technique for you.

(Am I the only one that recognizes the irony of me telling folks to fill in their profile data? :))
Click to expand...

Nope :D
 
Re: Lop

N4843W said:
There is no way in God's Blue Sky that losing a cylinder every 200 hours (x4) is due to LOP operation. Paul, you reminded me of my Grandpa who always put tubes in his tubeless tires and smoked straight Camels cuz there was something in those damn filters that will give you cancer !!!!
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Scott

Who said it was one every 200 hours or so, or did they go all all at once and together as no mention on the timing for the cylinder failures? To me everything is black and white engineering wise, wondering if it was some of those cylinders the FAA is putting an AD out on and think it was for those and they have now backed off on?
 
Re: Lop

Brand new factory engine. Two cylinders at about 600 hrs, two more at about 675 hours. Waiting on the other two.... it's a big-bore Continental thing, one theory is Conti does a lousy job machining the exhaust guides. Don't even ask about the Conti starter motor and adapter.

I liked the Lycs in my Commanders much better. But this has nothing to do with LOP...sorry I mentioned it
 
Re: Lop

Isaac, I Remeber the factory telling me this was your plane. WE purchased it directly from them in November of 2001. I think you were the previous owner, also, what issue was this plane covered on. I have done some research looking for this issue and can't find it.
Help
Clyde
 
I just purchased a 112 HS and haven't had much of a chance to try it out at altitude or try LOP operation. But I had previously built and flown a Vans RV6 with a brand new Lyc IO-360-M1B. It was the 8.5:1, not the 8.7:1 that the 112's have, but should be representative. Anyway, I would always run the RV6 LOP. My fuel use would go from about 12 gph to around 8-8.5 gph. CHTs were very cool. I would give up 2-4 knots though. Also, I could never get very far LOP even though my GAMI spread was only about 0.5 gph.

I notice that I'm responding to an old post from 2014. If anyone has more recent information or additional information re: running a 112HS LOP I'd like to be aware of it. I have heard or read that Robin "advised against LOP for the HotShots" but I don't understand his reasons. If anyone has any insight into that, I'd also like to hear it.
 
Short version: LOP on a turbocharged (or normalized) engine is different then normally aspirated. Since the 112HS uses a manual wastegate it is difficult to properly compensate for power loss when leaning. The 114HS is not impacted by that.

If you have a long leg, and preferably some extra hands, you can try it out. But it is like balancing on the head of a pin.

Regards,
Neal
 
I was under the impression that the hotshots used in automatic wastegate. The TC and TCA's use a manual wastegate. Pretty sure I'm correct on this one. Don't have a lot of experience with lean of peak though.
 
Hotshots use a manual wastegate. There is a pop-off valve to help protect against overboost but unwise to count on that to protect engine in normal ops.
 
On the TC and TCAs the gate is manual and I need to adjust throttle position as I climb to maintain manifold pressure. If I'm not careful with my throttle positioning It is pretty easy to overboost. I thought that one of the benefits of the turbo normalizer was that you could just go full throttle and that it would control manifold pressure and adjust with altitude.
Do I have this wrong?
 
From memory of flying Sven’s (now Ken’s) plane, the 112 hot shot has a manual waste gate. I believe the 114 HS is an automatic one. Carl??
 
That is correct
 
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