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04-25-2011, 09:04 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Vernatherm Types and Prices
Looking for a new vernatherm this AM....pricy little bugger. Noticed a few things.
The OEM and Superior (53E22144 and SL53E19600) vernatherms seem to be a product of Rostra Vernatherm:
http://www.vernatherm.com/
It's a core or capsule in a machined aluminum holder. Pull a retaining clip and the core slides out of the holder. We don't need a new holder to replace a bad core, but it looks like every parts source sells you one anyway, as an assembly.
Bashful fellow that I am, I rang up Rostra's engineer and asked him about the cores. He confirmed they are sold to other OEMs, but would not share the Rostra part number for the Lycoming application. My guess is you can buy the same core elsewhere (I dunno, Evenrude, Cummins, John Deere?) for a lot less than airplane prices. Basic outboard motor vernatherms are, for example, about $35. Anybody have a clue about an interchange?
Best price I've seen so fair for a Rostra-made Lycoming assembly is at Aero In Stock and Air Suppliers, both $248. Ouch!
ECI sells a "vernatherm" of their own design (or designed for them), part #AEL19600. I called ECI to confirm; it is not sourced from Rostra. Given that my OEM Rostra just died at 80-90 hours, that may be a Good Thing.
Different appearance is obvious:
http://www.eci.aero/pages/products_detail.aspx?in=529
Anybody have any field experience comments about the ECI unit?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Last edited by DanH : 12-23-2014 at 06:33 AM.
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04-25-2011, 10:36 AM
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Join Date: Feb 2006
Location: Austin, TX
Posts: 433
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No O-360 support?
Hi Dan,
Looking at ECI's www site that you provided, there's no O-360 listed.
AEIO-360
HIO-360
HO-360
IO-360
IVO-360
LHIO-360
LIO-360
LO-360
LTO-360
TIO-360
TO-360
VO-360
I this an error?
__________________
/\/elson
RV-7A Tip-Up
NW Austin, TX
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04-25-2011, 10:50 AM
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Join Date: May 2007
Location: Quincy, Florida
Posts: 680
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Vernatherm
I have an ECI Titan IO 360 with the vernatherm Dan described. Works like a charm.
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04-25-2011, 11:08 AM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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Larry Vetterman is very adamant about removing the vernatherm altogether and replacing it with the oil cooler bypass plunger and a remotely-operated valve to manually regulate the oil temps. I have this setup on my rocket and am not yet flying.
__________________
Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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04-25-2011, 12:00 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Just a thought..........
How about talking to the folks that you got the engine from???
I would think this should be a warranty issue???
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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04-25-2011, 05:00 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Dan, why not install an oil thermostat? The vernatherm is useless.
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
Last edited by Geico266 : 04-25-2011 at 05:03 PM.
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04-25-2011, 05:08 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
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Quote:
Originally Posted by Geico266
Dan, why not install an oil thermostat? The vernatherm is useless.
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Interesting comment, and nothing against a thermostat...but USELESS?!
I've had them in airplanes for decades - have never had one fail on me. I know that others have, of course - but since everything gets archived around here, that's a pretty extreme statement without a lot more data...
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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04-25-2011, 05:54 PM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Really guys, I was hoping to focus on two areas:
Where can you buy the same Rostra core in the non-aviation world?
How good is the less overpriced non-Rostra ECI substitute?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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04-25-2011, 05:58 PM
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Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,904
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ECI
Hey Dan,
I have an ECI IO360 in current 7. The vernatherm was check and it was reading 10 degrees low. I keep that in mind on my oil temp reading.
Did you give Rhonda a call to see what they can do? They might be able to exchange it.
__________________
Darwin N. Barrie
Chandler AZ
www.JDair.com
RV-7 N717EE-Flying (Sold)
RV-7 N717AZ Flying, in paint
EMS Bell 407,
Eurocopter 350 A-Star Driver
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04-25-2011, 06:09 PM
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Join Date: Nov 2005
Location: Davis, CA
Posts: 1,156
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Quote:
Originally Posted by DanH
Really guys, I was hoping to focus on two areas:
Where can you buy the same Rostra core in the non-aviation world?
How good is the less overpriced non-Rostra ECI substitute?
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What are the specs as you know it on the Rostra device? I'm thinking oil pressure to which the device is subject and temperature range at which it opens. Probably the former is as least as important. I know nothing about outboard marine motors but a little bit about tractors and have access to lots more info. If you can obtain the core for $35 or less it might be worth buying one to mess with, if you find a promising candidate.
__________________
Lars Pedersen
Davis, CA
RV-7 Flying as of June 24, 2012
960+ hours as of June 30, 2020. Where did the time go?
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