Home » Public Forums » GMCnet » [GMCnet] Modified Rotary engine
|
Re: [GMCnet] Modified Rotary engine [message #267186 is a reply to message #267185] |
Fri, 05 December 2014 13:28   |
Daniel DeLuca
 Messages: 120 Registered: June 2014
Karma: 0
|
Senior Member |
|
|
Wish I never sold my RX-7
> On Dec 5, 2014, at 2:02 PM, Kelvin Dietz wrote:
>
> http://www.rdmag.com/news/2014/12/small-engine-packs-punch?et_cid=4302124&et_rid=45586987&location=top
>
> The GMC content here is that they're developing it for lawn and garden equipment and, wait for it, generators!
>
> “If you look at a 3-kW military generator, it’s a 270-lb gorilla that takes five people to move around,” Shkolnik says. “You can imagine if we can make that into a 15-lb device, it’s pretty revolutionary for them.”
>
> Finally something to fit in a 230 generator compartment!
>
> Kelvin
> '73 23' in Eugene, OR
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267190 is a reply to message #267186] |
Fri, 05 December 2014 15:33   |
Joe Weir
 Messages: 769 Registered: February 2013 Location: Columbia, SC
Karma: 7
|
Senior Member |
|
|
Daniel DeLuca wrote on Fri, 05 December 2014 13:28Wish I never sold my RX-7
Same here.
There might be a predictor for TZE disease. Perhaps we need to advertise coaches for sale in the old VW and RX7 forums...
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
|
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267196 is a reply to message #267192] |
Fri, 05 December 2014 16:06   |
Joe Weir
 Messages: 769 Registered: February 2013 Location: Columbia, SC
Karma: 7
|
Senior Member |
|
|
Kelvin Dietz wrote on Fri, 05 December 2014 15:39On 12/5/2014 1:33 PM, Joe Weir wrote:
> Daniel DeLuca wrote on Fri, 05 December 2014 13:28
>> Wish I never sold my RX-7
>
> Same here.
>
> There might be a predictor for TZE disease. Perhaps we need to advertise coaches for sale in the old VW and RX7 forums...
I'm sure it is. It's a "cult car" kind of leaning.
I prefer to call it good taste in automobiles...
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267200 is a reply to message #267185] |
Fri, 05 December 2014 18:03   |
 |
Matt Colie
 Messages: 8547 Registered: March 2007 Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
Kelvin Dietz wrote on Fri, 05 December 2014 14:02http://www.rdmag.com/news/2014/12/small-engine-packs-punch?et_cid=4302124&et_rid=45586987&location=top
The GMC content here is that they're developing it for lawn and garden
equipment and, wait for it, generators!
"If you look at a 3-kW military generator, it's a 270-lb gorilla that
takes five people to move around," Shkolnik says. "You can imagine if we
can make that into a 15-lb device, it's pretty revolutionary for them."
Finally something to fit in a 230 generator compartment!
Kelvin
'73 23' in Eugene, OR
I really did own and rebuild an NSU Spyder years ago.
What I do not see detailed in any of their display is the rotor sealing systems.
It is interesting, but wake me up when a production version has 8000 hours on it and it is still performing.
Uncle Felix had running Wankel motors before WWII. It took him another 20 years to get one to last a week.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267207 is a reply to message #267203] |
Fri, 05 December 2014 18:43   |
k2gkk
 Messages: 4452 Registered: November 2009
Karma: -8
|
Senior Member |
|
|
Unless "they" have figured out a way to make the Wankel Cycle motor more fuel efficient (disregarding the seal problem), they'll be sledding on gravel! On a better note, isn't it easier to dampen noise as frequency rises? I imagine vibration would be much improved over a piston engine.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~~ k2gkk + hotmail dot com ~~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> Date: Sat, 6 Dec 2014 00:11:49 +0000
> From: ljdavick@comcast.net
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Modified Rotary engine
>
>
> It's interesting that they refer to this as a reverse-rotary (or something). The seals are on the block and oiled from galleys, they say, using much less oil than needed with the seals on the rotor. It would be sweet for a generator, but turning 8k RPM? Actually if it turned a multiple of 120 Hz then the generator could be simplified!!
>
> ...piston engine goes boing-de-de-boing-de-de-boing, but the Mazda goes Hmmmmmmmmmm...
>
> Larry Davick
> Fremont, California
> A Mystery Machine
> '76 (ish) Palm Beach
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267209 is a reply to message #267200] |
Fri, 05 December 2014 18:53   |
k2gkk
 Messages: 4452 Registered: November 2009
Karma: -8
|
Senior Member |
|
|
Back around 1970 or 1971, a co-worker in my Air Force unit in Wiesbaden, Germany bought an NSU RO-80 sedan. He liked it, but I rotated back to CONUS in 71 and don't know how it held up. Neat car, though.
I, on the other hand, bought a FIAT (Found In A Toilet/Fix It Again Tony) 124 Spider. Loved the car, but not the reliability (hardly any). If Fiat would redo that car and do it right, I'd probably buy another one. I have heard a rumor that Fiat might get together with Mazda and do a joint project. Hmmmm. Style and reliability together?
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~~ k2gkk + hotmail dot com ~~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> Date: Fri, 5 Dec 2014 17:03:21 -0700
> To: gmclist@temp.gmcnet.org
> From: matt7323tze@gmail.com
> Subject: Re: [GMCnet] Modified Rotary engine
>
> Kelvin Dietz wrote on Fri, 05 December 2014 14:02
>> http://www.rdmag.com/news/2014/12/small-engine-packs-punch?et_cid=4302124&et_rid=45586987&location=top
>>
>> The GMC content here is that they're developing it for lawn and garden
>> equipment and, wait for it, generators!
>>
>> "If you look at a 3-kW military generator, it's a 270-lb gorilla that
>> takes five people to move around," Shkolnik says. "You can imagine if we
>> can make that into a 15-lb device, it's pretty revolutionary for them."
>>
>> Finally something to fit in a 230 generator compartment!
>>
>> Kelvin
>> '73 23' in Eugene, OR
>
> I really did own and rebuild an NSU Spyder years ago.
>
> What I do not see detailed in any of their display is the rotor sealing systems.
> It is interesting, but wake me up when a production version has 8000 hours on it and it is still performing.
>
> Uncle Felix had running Wankel motors before WWII. It took him another 20 years to get one to last a week.
>
> Matt
>
> --
> Matt & Mary Colie - Members GMCMI, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267222 is a reply to message #267185] |
Sat, 06 December 2014 06:38   |
kerry pinkerton
 Messages: 2565 Registered: July 2012 Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
A friends son had one of the new Rotary engined Mazda's (Rx8???). Really strong engine until it wasn't. In the space of 10 miles the seals failed (not the correct name but what passes for piston rings...if it had pistons). By failed, the motor went from being fine to barely being able to get off the highway in 10 miles of city driving. The motor at that point required a many thousand dollar overhaul. I loaned him my trailer and helped him pick it up at the dealer after they gave him a 4K estimate on the repair. He sold it to someone who had a good engine out of a wreck and lost about 3K on the whole deal by the time he'd paid off the loan. He's sworn off rotaries.
Apparently with the latest version, failure can come with little or no warning and no external cause.
Note, I've never owned a rotary and only ridden in one once. The above is ALL I know about them and this is anecdotal evidence although I did hear the mechanic tell my friend the 'failure can come with no warning and no cause' bit.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267226 is a reply to message #267209] |
Sat, 06 December 2014 07:48   |
Joe Weir
 Messages: 769 Registered: February 2013 Location: Columbia, SC
Karma: 7
|
Senior Member |
|
|
k2gkk wrote on Fri, 05 December 2014 18:53Back around 1970 or 1971, a co-worker in my Air Force unit in Wiesbaden, Germany bought an NSU RO-80 sedan. He liked it, but I rotated back to CONUS in 71 and don't know how it held up. Neat car, though.
I, on the other hand, bought a FIAT (Found In A Toilet/Fix It Again Tony) 124 Spider. Loved the car, but not the reliability (hardly any). If Fiat would redo that car and do it right, I'd probably buy another one. I have heard a rumor that Fiat might get together with Mazda and do a joint project. Hmmmm. Style and reliability together?
Mazda did it without fiat or the rotary and called it the Miata...just saying.
The 13a and 13b engined Rx 7 rotary seals would dry out if the car sat up for too long. I had a friend who had 300k on his original engined third gen turbo that was still going strong last I saw him. like an airplane or a gmc. They do not like sitting.
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
[Updated on: Sat, 06 December 2014 07:50] Report message to a moderator
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267228 is a reply to message #267222] |
Sat, 06 December 2014 08:04   |
Bob de Kruyff
 Messages: 4260 Registered: January 2004 Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
kerry pinkerton wrote on Sat, 06 December 2014 05:38A friends son had one of the new Rotary engined Mazda's (Rx8???). Really strong engine until it wasn't. In the space of 10 miles the seals failed (not the correct name but what passes for piston rings...if it had pistons). By failed, the motor went from being fine to barely being able to get off the highway in 10 miles of city driving. The motor at that point required a many thousand dollar overhaul. I loaned him my trailer and helped him pick it up at the dealer after they gave him a 4K estimate on the repair. He sold it to someone who had a good engine out of a wreck and lost about 3K on the whole deal by the time he'd paid off the loan. He's sworn off rotaries.
Apparently with the latest version, failure can come with little or no warning and no external cause.
Note, I've never owned a rotary and only ridden in one once. The above is ALL I know about them and this is anecdotal evidence although I did hear the mechanic tell my friend the 'failure can come with no warning and no cause' bit.
Thank G.d our piston engines never fail that abruptly
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
Re: [GMCnet] Modified Rotary engine [message #267233 is a reply to message #267228] |
Sat, 06 December 2014 09:21   |
Daniel DeLuca
 Messages: 120 Registered: June 2014
Karma: 0
|
Senior Member |
|
|
The motor in my 2nd gen rx-7 ran strong with over 130,000 on it until I sold it. Probably helped it was not a turbo and that I did not thrash it. I could coax 22 or 23 mpg out of it, but it was a SMALL simple car. Now if the seals did blow, you could take the engine out and rebuild it on a table, it's so small and light. That's assuming it was only seals and you did not have to get the eccentric chamber machined by like the one or 2 guys in the country that knew how.
If they ever made small rotarys available for power equipment I think generators would be a good fit. Small lightweight and practically no vibrations. I'll sign up to be a beta tester.
Dan
Sent from my iPhone
> On Dec 6, 2014, at 9:04 AM, Bob de Kruyff wrote:
>
> kerry pinkerton wrote on Sat, 06 December 2014 05:38
>> A friends son had one of the new Rotary engined Mazda's (Rx8???). Really strong engine until it wasn't. In the space of 10 miles the seals
>> failed (not the correct name but what passes for piston rings...if it had pistons). By failed, the motor went from being fine to barely being able
>> to get off the highway in 10 miles of city driving. The motor at that point required a many thousand dollar overhaul. I loaned him my trailer and
>> helped him pick it up at the dealer after they gave him a 4K estimate on the repair. He sold it to someone who had a good engine out of a wreck and
>> lost about 3K on the whole deal by the time he'd paid off the loan. He's sworn off rotaries.
>>
>> Apparently with the latest version, failure can come with little or no warning and no external cause.
>>
>> Note, I've never owned a rotary and only ridden in one once. The above is ALL I know about them and this is anecdotal evidence although I did
>> hear the mechanic tell my friend the 'failure can come with no warning and no cause' bit.
>
> Thank G.d our piston engines never fail that abruptly :)
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
Goto Forum:
Current Time: Thu Apr 03 02:40:05 CDT 2025
Total time taken to generate the page: 0.01324 seconds
|