View Full Version : Anyone try one of these Nickel Coated Pistons?
WillJames
06-14-2004, 01:13 PM
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3682148271
????????
Never tried or even seen one before but having looked at it I would like to know how well the nickel plating will wear against the Zenoah cylinder plating which is chrome/nickel?
Don't like the C clips as the tangs could break off.
Lighter weight could mean having to re-balance the crank?
Paul.
WillJames
06-15-2004, 05:19 AM
Yea I would not run one. Your right about the ends of the clips. All that vibration on the 26 nad they would fail I bet. Seems odd to run similar plating on bothe the cylinder and the piston, I thought that was a no no.
Just saw this and wondered.
On the other hand, if you can use the standard type C clips then maybe the lighter weight would help with the higher vibration experienced with the G26?
I would still be concerned about the nickel plating peeling off though.
Paul.
bigrcr
06-15-2004, 07:03 AM
Being lighter should smooth out the G-26 a bit. I believe Bill Meader did a piston lightening on one of his G-26's and it made it a bit smoother. I think he just lightened it until it weighed the same as the G-231 piston. I'm not sold on the plating though. A high silicon content aluminum would be better IMO.
Later,
Galifrey
06-25-2004, 08:18 AM
Used to run these in race karts...
No problem with them whatsoever...
:D
Waller
06-25-2004, 11:35 AM
The lighter weight is of definite benefit to the G26, as it is waaaay top heavy.
I've skirted the piston (extremely), machined in one tungsten weight in one on the counterbalancers and also replaced the rod with a drilled titanium unit. Much smoother than before.
Billme
06-25-2004, 02:48 PM
I desided I wanted to try it a different way this time...I shoehorned a G230RC crank in the PUH crank case...Hope to have it running by Sunday ..
Also, There is a chance I will be meeting with the chief engineer for Zenoah next week.. If any of you guys want to make a special request, you better speak up now:) Because I'm going to bend the heck out of his ear!
Regards,
Bill
Galifrey
07-07-2004, 12:39 PM
Full circle cranks, reed valves, better balanced engines...
er..
:D
Galifrey
07-11-2004, 04:34 AM
http://www.davesmotors.com/store/product706.html
:glasses:
Dr_Fibinotchi
03-01-2005, 07:15 PM
I dont know how many of you get popluar science. I was browsing through an old one the finacee's dad gave and found an interesting article in the Sept 2004pg 89.
I found an article from a google search on the same and thought the more motor inclined might know about this (or not). Looks like he did a more complete burn with the mod. In Popular Science it has a couple closeups of the top of the piston and what not. While its not a G-26 or heli engine xyz, it relates to combustion.
http://www.webwarrior.net/modules.p...rticle&sid=5883
""
Finally he was allowed to bring his engines and hook them to a Benz EC-70 dynamometer with a five-gas analyzer and a Benz gravimetric fuel-measuring device. A week later, he got his results. According to ARAI, at between 2,000 and 2,800 rpm, Singh’s modified engine used between 10 and 42 percent less fuel than its unmodified twin, with no appreciable losses in torque or power. And, as he suspected, it ran cooler too—as much as 16°C cooler
I really doubt any mod has ever been tried on a heli engine, but there could always be a first...