George, Bill & All,
This is not an endorsement.
Someone said they were looking and I just pointed out where they can be found.
Everyone can make theor own choices. I make no reccomendations
T Mann
From: "George Lendich" <lendich@aanet.com.au>
Sent: Wednesday, August 04, 2010 8:24 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Bad rotary week
Thomas and all,
I have seen X-treme/ Guru parts before - very nice products, however I wonder how the aluminium end housings surface stand-up to Aviation use ( constant high RPM). Only a test of the products would demonstrate that. Considering Powersport and Mistral tried all surface treatments known to man and they all failed, mainly because of sub-strate failure, I will leave the decision on that up to the reader.
Personally I can't afford to waste that sort of money on testing.
Mind you I'm not running X-treme's products down, their an Aussie company and I wish them all the best and in their particular market their doing very well. The products for drag racing and street rod are all very good/ excellent products.
If you read the info on rotoryengine.com and X-treme, you will see that there are some improvements ( many improvements) which can be had for the rotary. Certainly any mass produced engine can benefit from such improvements.
However I like the way Bill Jepson is going, he won't jump into any project that isn't worth it's merit, even if he has to take it slower and make it all that much better. Getting it right the first time takes a lot of effort.
My opinion for what it's worth.
George
I think this was for me (Tom). Bruce T. has built a lot of engines for aircraft which is why I consider his a good source of info here. He built Tracy's 20B if I remember correctly.
The price quoted was $5800.00 CAD. He suggested I keep my current center iron if it's in good shape otherwise he would buy it from me if I insisted on an aluminum version.
The link to the center housing is here:
http://www.rotaryengine.com/services/aluminumhouse.htm
I believe the other side housings and rotor housings originate from Xtreme Rotaries out of Australia.
http://xtremerotaries.com/index.php
I saw a 13B assembled keg that weighed in at 109 lbs on the Mazda Trix site (http://www.mazdatrix.com/ENGPARTRACE.HTM)
I don't know what the total weight savings worked out to but that is fairly impressive.
I would not consider aluminum to be a good choice for a turbo application. In my case I'm going N/A anyway.
From: wrjjrs@aol.com
Sent: Tuesday, August 03, 2010 7:20 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Bad rotary week
Bruce,
If you can find the aluminum 20B intermediate housing anywhere please let me know who is making it. The price for the STOCK cast iron 20B intermediate housing has gone to about $5000.00 on the retail market. I know, Steve and I have been trying to buy one! The stock 20 B intermediate housing weighs 49 pounds! The side housings George was mentioning were custom lightweight housings made in steel that weigh about 1 pound more than the all aluminum housings IE. in a 2 rotor they would be about 3 pounds over the all aluminum parts. The advantage is that you can gas nitride them just like the stock parts. None of the available aluminum housings has ever been run in a long term high-output engine. The Factory Mazda 26B 4 rotor Le Mans engine used aluminum sideplates with an exotic detonation gun applied ceramic coating. No one has reproduced those housings for sale. To my knowledge none of our flying rotaries has used the Racing Beat housings, which are available only for the 13B and are VERY pricey. They also have been notorious for extending delivery times on those housings.
Bill Jepson
-----Original Message----- From: Thomas Mann <tmann@n200lz.com> To: Rotary motors in aircraft <flyrotary@lancaironline.net> Sent: Tue, Aug 3, 2010 3:02 pm Subject: [FlyRotary] Re: Bad rotary week
The Aluminum rotor housings will save you 15 lbs each. I'm not sure how much (in weight) the Aluminum side housings will save you but they are available as well. The 20B Center Housing can be had (in aluminum) as well but it is a bit pricey at $5K +. All available through www.rotaryengine.comBruce T. put me on to them.
From: wrjjrs@aol.com
Sent: Tuesday, August 03, 2010 4:36 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Bad rotary week
Thomas George was speaking of the side plates/intermed housings.
Bill Jepson
-----Original Message----- From: Thomas Mann < tmann@n200lz.com> To: Rotary motors in aircraft < flyrotary@lancaironline.net> Sent: Tue, Aug 3, 2010 1:33 pm Subject: [FlyRotary] Re: Bad rotary week
..... or go with the aluminum housings already P-Ported. It saves 15 lbs per rotor.
From: Dwayne Parkinson <dwayneparkinson@yahoo.com>
Sent: Tuesday, August 03, 2010 3:20 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Bad rotary week
Lightweight carbon steel housings? Where exactly do I find those?
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