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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Predator Z231H and 23cc Engine
10-19-2004 03:15 PM  13 years agoPost 1
Jgiang

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Raleigh, the city in​the park.... :)

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I'm looking at the Z231H Engine and not sure if this engine need any mod and wonder about the engine vibration.

Can some one tell if the engine Z231H Engine reliable?

what are the different between the Z231H Engine and the Zenoha 23CC Gasoline Heli Engine?

Can these two engines able to start using the starter shaft or it just have to use the pull start.

Thanks,

JG


It was in the air, but now it's on the ground. :)

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10-19-2004 03:50 PM  13 years agoPost 2
SteveH

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Texas

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JG,

There are NO vibration issues with the 231 engine and it is very reliable. The older G23 PUH engine was less powerful, but it too was smooth and reliable. Either engine can be started with the top start system on the Predator Gasser. The instructions say not to use the top starting system with the 26, but I know folks that do without any serious problems to date.

The government cannot give you anything without first taking it from someone else.

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10-19-2004 07:17 PM  13 years agoPost 3
mike lewis

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northeastern AZ

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What are the differences?

What are the improvements in the one over the other? What are the main differences? Thanks ahead of time Mike anyone?

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10-19-2004 07:49 PM  13 years agoPost 4
SteveH

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Texas

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Mike,

I certainly don't profess to know all the differences between the engines, but I DO know the 231 is the newer version of the 23, and both are 23cc displacement. The 26 is 26cc and was created by bolting a larger bore cylinder and piston onto the 231. I also know the newer 231 and 26 engines have larger cooling fins allowing them to put out more power while staying cool enough. I also know the 231 puts out more power than the older 23, but I don't know how/why. In stock form, the 26 has vibration issues when used in helis, and that is why Century is selling only the Hanson ballanced 26's.

All of this, I have been told by Billme, so if anyone wants to argue, argue with Bill.

In the past, I owned several 23's in other brands of helis and while they all were reliable, the were lacking in power, IMHO. I currently am flying a Predator Gasser SE with the Hanson ballanced 26, and I'm here to testify, it's a different ANIMAL than the old 23, and I do mean ANIMAL!

The government cannot give you anything without first taking it from someone else.

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10-20-2004 12:18 AM  13 years agoPost 5
Billme

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MS

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Steve, you are correct...
The main reason the 231 is more powerful than the older G23 is because of the size of the transfer ports.. They are almost double the size. The 231 has a bigger carb (643) compared to the 167and 197 series...
Regards,
Bill

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10-20-2004 02:58 AM  13 years agoPost 6
mike lewis

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northeastern AZ

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Thanks that is the meat I was looking for!!

Simple and to the point Thanks

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10-20-2004 04:23 AM  13 years agoPost 7
rcrebel

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Michigan

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SteveH

How is that G26 Hanson as far as vibrations go? Sounds like you're impressed with the power! I had a stock G26 in my Bergen and it was a shaker for sure.

I'm ordering a Predator Gas Carbon next week and am leary on getting the G26 engine until I can get some feedback on the vibe issue.

rcrebel

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10-20-2004 01:13 PM  13 years agoPost 8
SteveH

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Texas

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Rcrebel,

I've just finished my second gallon of fuel thru my Predator SE with the Hanson ballanced 26 and I've not had any issues related to vibration so far. Not going to tell you there is NO vibration because we all know there is a piston and rod in recipricating motion, to there is vibration. I can only compare it to the old G23PUH engines I had and I can say that I cannot detect any increased vibration.

The government cannot give you anything without first taking it from someone else.

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10-20-2004 01:42 PM  13 years agoPost 9
Jgiang

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Raleigh, the city in​the park.... :)

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thanks SteveH and BillMe
that's a straight and clear answer that I'm looking for.

one more thing, what would you suggest for the muffler on the 231.


It was in the air, but now it's on the ground. :)

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10-20-2004 04:15 PM  13 years agoPost 10
Billme

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MS

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The Torpedo is the bomb!

Bill

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10-20-2004 04:21 PM  13 years agoPost 11
Jgiang

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Raleigh, the city in​the park.... :)

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seem like you designed and developed that Torpedo. look really nice


It was in the air, but now it's on the ground. :)

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10-20-2004 04:49 PM  13 years agoPost 12
MikeSherman

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Franksville, WI

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...not trying to hijack this thread

Bill - were you working on a larger volume Torpedo style muffler/pipe for the larger g26 motor? I vaguely remember seeing a prototype pipe at IRCHA in the Century booth bolted to a Predator. It looked slightly longer. I forgot about it until now.

Thanks, again, Bill for all your informative posts. Looks like a carbon gasser may be in my future. Magic 8-ball holds its fate.

-Mike

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10-21-2004 02:11 AM  13 years agoPost 13
Billme

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MS

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I found a way to make the reg torpedo work with the G26, so we desided not to do the larger muffler...The Torpedo is just the right size , and is better suited for the gasser due to the balance either side of the header which makes it more pleasing to the model.. A simple plug change from the stock plug, will dramatically improve performance...

I just come from the field after doing some changes on the EX port of my on personal machine... It was really smooth.. The Predator with the G26H, and The rotortech 720's at 6.9 is a dream come true for me.. It fits my style to a T
Regards,
Bill

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