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ROTOMAX skypower 130 engine (130hp max/120 cruise)

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rsteele(at)rjsit.com
Guest

Posted: Thu Mar 27, 2008 5:24 pm Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Did anyone else notice that the 100hp single rotor is has oil  

injection?  I don't know much about rotaries, I thought they were two  

stroke like anyway, firing every revolution.  I just thought this was  

curious.

Ron

On Mar 27, 2008, at 8:00 PM, Matt Ronics wrote:

 	  Quote: 	

 kmccune wrote:

> The single rotor turbo is not bad...       2.8 - 5.6 gph

>

 Not too many years ago there was a small US-based viable single  

 rotor rotary engine being developed.  I would suspect that one of  

 these two manufacturers was/is involved with the earlier project  

 that I am thinking of.

 I recall that the engine's fuel consumption was on par with that of  

 a 2-stroke to get the same horsepower.  The projected engine price  

 was more than a 2-stroke Rotax.  With comparable fuel consumption,  

 if/when these engines become available, I think one would have to  

 choose between the known quirks of the 2-stroke and the unknown  

 quirks of these engines.  If forced to make this decision, I'd  

 choose the former.

 Read this topic online here:

 http://forums.matronics.com/viewtopic.php?p=173148#173148

jerry(at)jerryhey.com
Guest

Posted: Thu Mar 27, 2008 6:09 pm Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Not only is there oil injection, there is no oil pan at all.  The oil  

system is total loss and before this panics anyone, check it out at  

Sun N Fun. It is cool and it is proven.   Much superior to  

recirculating dirty oil,  I think.   Also, since there is no pan, the  

engine's foot print, size and weight, is significantly reduced.   Like  

I said, I have no connection with the company but I do admire this  

engine.  I tend to think it will live up to its promises.    jerry

On Mar 27, 2008, at 9:17 PM, Ronald Steele wrote:

 	  Quote: 	

 Did anyone else notice that the 100hp single rotor is has oil  

 injection?  I don't know much about rotaries, I thought they were  

 two stroke like anyway, firing every revolution.  I just thought  

 this was curious.

 Ron

 On Mar 27, 2008, at 8:00 PM, Matt Ronics wrote:

> 

> <e_jocular(at)yahoo.com>

> kmccune wrote:

>> The single rotor turbo is not bad...       2.8 - 5.6 gph

>>

> Not too many years ago there was a small US-based viable single  

> rotor rotary engine being developed.  I would suspect that one of  

> these two manufacturers was/is involved with the earlier project  

> that I am thinking of.

>

> I recall that the engine's fuel consumption was on par with that of  

> a 2-stroke to get the same horsepower.  The projected engine price  

> was more than a 2-stroke Rotax.  With comparable fuel consumption,  

> if/when these engines become available, I think one would have to  

> choose between the known quirks of the 2-stroke and the unknown  

> quirks of these engines.  If forced to make this decision, I'd  

> choose the former.

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p=173148#173148

>

ggower_99(at)yahoo.com
Guest

Posted: Thu Mar 27, 2008 11:10 pm Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Not writing in favor or against...   Just my personal point of view (could be all wrong dont trust me in this matter, Please!  

   

  There are several  "data"  ( speed, weight, gph, costs, etc) available in all aviation products for sale (aircraft, engines, kits, conversons, electronic devices, etc.) you name it:

   

  1.- The estimate (designer/developer) data (dreamer motivational "personal idea"),  

  2.- The computer generated data (best condition, optimistic parameters?),  

  3.- The sales/promotion data (nobody sells a bad product),  

  4.- The "factory" test data (in "optimum (where?)" conditions of climate, wind, altitude, etc.) 

  All this with good faith from an honest people, just too optimistic. 

  And finaly 

  5.- The purchaser/pilot data on the every day REAL tests   of the  first products... If Murphy is not around...

   

  Saludos

  Gary Gower 

  Flying from Chapala, Mexico

  Have a box full  of Marvelous (last wonder in Earth) aviation products  (triplets and product information)  that exist no more...  Saved lots of money 

  Do not archive



kmccune <kmccune(at)somtel.net> wrote:

  [quote]--> Zenith-List message posted by: "kmccune" 



The single rotor turbo is not bad... 2.8 - 5.6 gph 



[quote="graeme(at)coletoolcentre."]the main problem with rotary engines is fuel consumption.

check endurance with the quoted consumption figures 

rotary engines can be noisy at the exhaust also.



graemecns



 	  Quote: 	
		   ---


	




--------

Mark Twain: Twenty years from now  [quote][b]

jim.lanier(at)charter.net
Guest

Posted: Thu Mar 27, 2008 11:59 pm Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

I don't understand. Is there an oil reservoir that feeds the engine 

while the oil is being consumed (or exhausted)?



Jim

Jerry Hey wrote:

 	  Quote: 	
		   



 Not only is there oil injection, there is no oil pan at all.  The oil 

 system is total loss and before this panics anyone, check it out at 

 Sun N Fun. It is cool and it is proven.   Much superior to 

 recirculating dirty oil,  I think.   Also, since there is no pan, the 

 engine's foot print, size and weight, is significantly reduced.   Like 

 I said, I have no connection with the company but I do admire this 

 engine.  I tend to think it will live up to its promises.    jerry

jerry(at)jerryhey.com
Guest

Posted: Fri Mar 28, 2008 2:10 am Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Yes,  you can mount a reservoir on the firewall.  Oil is pumped  

through the eccentric to the bearings and then it is picked up by the  

rotor tip seals to lubricate them.  Final step,  it is consumed in  

combustion.   Oil consumption is approximately 1 qt per 37 gal of fuel.

On Mar 28, 2008, at 3:53 AM, James E. Lanier wrote:

 	  Quote: 	

 >

 I don't understand. Is there an oil reservoir that feeds the engine  

 while the oil is being consumed (or exhausted)?

 Jim

 Jerry Hey wrote:

> 

>

> Not only is there oil injection, there is no oil pan at all.  The  

> oil system is total loss and before this panics anyone, check it  

> out at Sun N Fun. It is cool and it is proven.   Much superior to  

> recirculating dirty oil,  I think.   Also, since there is no pan,  

> the engine's foot print, size and weight, is significantly  

> reduced.   Like I said, I have no connection with the company but I  

> do admire this engine.  I tend to think it will live up to its  

> promises.    jerry

>

>

grant.corriveau(at)TELUS.
Guest

Posted: Fri Mar 28, 2008 7:04 am Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

On 2008 03 27--, at 11:58 PM, Zenith-List Digest Server wrote: 	  Quote: 	
		  

It certainly looks very promising, but we'll have to wait   

and see since "things that seem too good to be true probably are  	


Every engine sounds promising in the brochures  but few actually prove to be as successful as their hype.  I notice that the advertised weights don't mention radiators and exhaust systems/mufflers, and so on.  Be sure to compare fully-installed weights.  Also the belt drive is an integral part of the system and will significantly affect the final weight, reliability and complexity of the propulsion system.

I love the lack of mechanical engine parts.  If it finally proves to be reliable and If the installed weight is comparable, I'd prefer this engine over a Rotax just for that feature alone.  But there are still a lot of significant IFs to face...

 [quote][b]

bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Fri Mar 28, 2008 8:03 am Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

From their website:



* Fuel burn based upon using Mogas 87 octane. Other fuels may yield  

different gph rates. Actual fuel burn will be affected by variables  

like aircraft design, PSRU, prop design and pitch, weather, headwind,  

etc. Obviously, you must establish your own fuel burn rates in your  

own aircraft.



This sounds like pure BS. Fuel consumption for a particular engine  

configuration is dependent on how much power it is producing.  None of  

the variables listed above (except maybe fuel type) have anything to  

do with gallons per hour consumed. The listed burn rates are useless  

unless you know how much power the engine was producing at that burn  

rate. Listing the brake specific fuel consumption would be much more  

useful.






The single rotor turbo is not bad... 2.8 - 5.6 gph



-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Ken Erickson

Joined: 09 Jan 2006
Posts: 2

Posted: Fri Mar 28, 2008 9:28 am Post subject: Re: ROTOMAX skypower 130 engine (130hp max/120 cruise)

I have been in touch with Nate at Rotary Aircraft Engines - http://www.rotaryae.com/  inquring about the single rotor turbo model for my 701. 



Regarding the weight:

"What is the weight with cooling/exhaust system, PSRU etc? --The total weight will be around 140 lbs. "



Regarding the oil injection:

"The oil reservoir tank is now being provided w/the engine along with a line.  However, you are free to use your own.  Basically since the burn on the carb version of our engine burns 150-1 you will need 1 gallon of oil for every 150gals of gas you burn. 



The Fuel injected version of the engine should be closer to 200-1 on the oil burn. So we have a tank that holds a few quarts of oil and you will need to top it off after a couple fill ups!"



CH701 - Scratch & slowing building

_________________
CH701 Scratch Builder
Rudder completed

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Fri Mar 28, 2008 9:50 am Post subject: Re: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Those "BS" factors among others are what determines your power setting and so your fuel burn. 

 	  bryanmmartin wrote: 	
		  From their website:



* Fuel burn based upon using Mogas 87 octane. Other fuels may yield  

different gph rates. Actual fuel burn will be affected by variables  

like aircraft design, PSRU, prop design and pitch, weather, headwind,  

etc. Obviously, you must establish your own fuel burn rates in your  

own aircraft.



This sounds like pure BS. Fuel consumption for a particular engine  

configuration is dependent on how much power it is producing.  None of  

the variables listed above (except maybe fuel type) have anything to  

do with gallons per hour consumed. The listed burn rates are useless  

unless you know how much power the engine was producing at that burn  

rate. Listing the brake specific fuel consumption would be much more  

useful.



The single rotor turbo is not bad... 2.8 - 5.6 gph



-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

_________________
â€œAlways do what you are afraid to do.â€
R.W. Emerson (1803-1882)

"Real freedom is the sustained act of being an individual." WW - 2009

"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune

bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Fri Mar 28, 2008 11:53 am Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Those factors determine how much power you will need to get the  

performance you want. They have little to do with how much fuel a  

particular engine will burn at that power setting. In order to compare  

the fuel consumption of different engines, you need to know the BSFC  

of the engines. Just stating a fuel burn in gallons per hour without  

any further details isn't very useful. BSFC at least gives you  

somewhere to start.



 	  Quote: 	
		  

 



 Those "BS" factors among others are what determines your power  

 setting and so your fuel burn.



 bryanmmartin wrote:

> From their website:

>

> * Fuel burn based upon using Mogas 87 octane. Other fuels may yield

> different gph rates. Actual fuel burn will be affected by variables

> like aircraft design, PSRU, prop design and pitch, weather, headwind,

> etc. Obviously, you must establish your own fuel burn rates in your

> own aircraft.

>

> This sounds like pure BS. Fuel consumption for a particular engine

> configuration is dependent on how much power it is producing.  None  

> of

> the variables listed above (except maybe fuel type) have anything to

> do with gallons per hour consumed. The listed burn rates are useless

> unless you know how much power the engine was producing at that burn

> rate. Listing the brake specific fuel consumption would be much more

> useful.

>

> The single rotor turbo is not bad... 2.8 - 5.6 gph

>


	




-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Fri Mar 28, 2008 2:08 pm Post subject: Re: ROTOMAX skypower 130 engine (130hp max/120 cruise)

Exactly, so do you believe we ALL drive 55 too?



[quote="bryanmmartin"]Those factors determine how much power you will need to get the  

performance you want. 

[quote]

bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Fri Mar 28, 2008 2:38 pm Post subject: ROTOMAX skypower 130 engine (130hp max/120 cruise)

What we have here is a failure to communicate.

On Mar 28, 2008, at 6:08 PM, kmccune wrote:



 	  Quote: 	
		   



 Exactly, so do you believe we ALL drive 55 too?



 [quote="bryanmmartin"]Those factors determine how much power you  

 will need to get the

 performance you want.




	




-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Fri Mar 28, 2008 2:51 pm Post subject: Re: ROTOMAX skypower 130 engine (130hp max/120 cruise)

I don't believe that is the case. But its all good! We will most likely know in a  year or so the results. Soon enough for me. 



Do not archive

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