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SSC -- Let's can the rpm limit!! - 9/8/2007 7:20:56 PM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline 		Fellas, since SSC has become only a ever so slightly slower version of Open B, let's can the 17,500 rpm rule and "let them run". Keep the stock $65.00 max price engine rule, and have a $50 dollar engine buy out rule where any competitor can buy another competitor's engine for $50 on the spot. Ok, I have on my body armour, lexan face mask.... ready, aim, fire away!

Regards,
GPB
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RE: SSC -- Let's can the rpm limit!! - 9/8/2007 9:15:14 PM   
RC MANIAC119


 

Posts: 574
Joined: 11/3/2003
From: muskegon, MI, USA
Status: offline 		It will never happen........

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RE: SSC -- Let's can the rpm limit!! - 9/8/2007 10:05:04 PM   
combatpigg



Posts: 10133
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		To make it a slower form of SSC, what about making the LA .15 engine turn a 9x3 prop at whatever rpm it can? I agree that SSC isn't all that S or S, just C.
Diesel .15s with 8x6 nylon props is SSC.

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RE: SSC -- Let's can the rpm limit!! - 9/8/2007 10:33:02 PM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline
quote:

ORIGINAL: combatpigg

To make it a slower form of SSC, what about making the LA .15 engine turn a 9x3 prop at whatever rpm it can? I agree that SSC isn't all that S or S, just C.
Diesel .15s with 8x6 nylon props is SSC.



hmmmm, I like the idea of diesel .15 and an 8 X 6. Not only do they run bad, but they smell bad too.

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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 2:42:53 AM   
Lou Melancon


 

Posts: 289
Joined: 10/13/2002
From: Alpharetta, GA, USA
Status: offline 		Mike,
Slow and Survivable Combat was based on a max airspeed of 49mph, which is the theoretical speed of an 8X3 at 17,500 rpms. Initially no one could reach 17,500 and it was thought to be a silly limit till folks figured out how to get to 19,000. Mike Fredricks warned us all of scope creep and he was right. The scope has crept up by the following changes (and I was behind some of them):


  • Allow the muffler to be drilled out and the baffle removed.
  • Allow use of pressurized fuel systems
  • Allow substitution of needle valves and backplates in the name of reliability
  • Variation from contest to contest of rpm check process
  • Allowing electrics into event without enough testing to assure a level playing field
  • Lack of enforcement of minimum weights


If the event stayed true to the "slow and survivable" concept many of these things would not have been allowed, and I was one of the ones who let them happen without realizing just what the consequences would be. Now I would suggest going to larger wing area minimum and upping the minimum weight to slow things down.



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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 3:09:08 AM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline
quote:

ORIGINAL: Lou Melancon

Mike,
Slow and Survivable Combat was based on a max airspeed of 49mph, which is the theoretical speed of an 8X3 at 17,500 rpms. Initially no one could reach 17,500 and it was thought to be a silly limit till folks figured out how to get to 19,000. Mike Fredricks warned us all of scope creep and he was right. The scope has crept up by the following changes (and I was behind some of them):


  • Allow the muffler to be drilled out and the baffle removed.
  • Allow use of pressurized fuel systems
  • Allow substitution of needle valves and backplates in the name of reliability
  • Variation from contest to contest of rpm check process
  • Allowing electrics into event without enough testing to assure a level playing field
  • Lack of enforcement of minimum weights


If the event stayed true to the "slow and survivable" concept many of these things would not have been allowed, and I was one of the ones who let them happen without realizing just what the consequences would be. Now I would suggest going to larger wing area minimum and upping the minimum weight to slow things down.




Hi Lou,

You make some very good points and I did not realize how the little changes add up to what we have today as you listed them here. For Sunday fun combat, I fly a three and a half pound Tuff Flight Panther, and unless my .15 is running in the mid 18's, I wouldn't be able to loop! Obviously, that is quite heavy for an SSC competition model, but maybe if the minimum weight for SSC was two and three quarter pounds, with wing area minimums in the 650 square inch range, that would return the class back more to a finesse event. Other opinions???
GPB

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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 5:14:21 AM   
AirScharnell


 

Posts: 29
Joined: 6/8/2004
From: Parker, CO, USA
Status: offline 		Hey Mike, you could change the rules by state?
At 5800 elevation we need every RPM the engine puts out too fly.

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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 12:03:06 PM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline 		Ha! Yes, that thin, clean, Colorado air does create it's own set of issues. Perhaps increasing the minimum weight and wing area and eliminating the rpm rule would be the next evolution in the SSC revolution.

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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 1:16:28 PM   
Alex Treneff



Posts: 145
Joined: 2/25/2006
From: Jackson, TN, USA
Status: offline 		A class without an RPM limit exists. Open A.

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Alex Treneff
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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 1:35:11 PM   
combatpigg



Posts: 10133
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		Increasing model weight won't make them slower, it will increase kinetic energy though. Bringing the rpms down to a managable level and LIMITING model weight to a MAX will help bring about a class where you can fly all weekend with one plane and a back up. The target air speed can be set even lower if the weight is restricted and limit the power with a 9x3 prop. The 9x3 prop idea isn't something that I've tried yet on my LA .15, but I'm willing to bet it would work on a light enough plane.

Too bad diesels have so many objectional traits, like the smell, nasty clean up, tempermental running in the heat, etc., because they deliver the kind of power that is perfect for SSC [when everything is working right]. You will usually burn barrel the diesel planes after a couple years due to their fuel soaked funkyness instead of retiring them due to massive damage.

< Message edited by combatpigg -- 9/10/2007 1:46:32 PM >

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Led Zeppelin is NOT "old fogie" music.

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RE: SSC -- Let's can the rpm limit!! - 9/10/2007 2:55:30 PM   
AirScharnell


 

Posts: 29
Joined: 6/8/2004
From: Parker, CO, USA
Status: offline 		Alex I mentioned a change for OPEN A in RCCA forum. For US air deprived pilots.
That is one reason SSC has not taken on in the UPPER WEST region.
Also I recieved comments about SSC when I was in UTAH this summer, and why they dont fly it.

We have 4 or 5 pilots east of Denver that still try and fly SSC when we can. My last bird was flying fair at 2lbs 13oz. but the 15 LA was screaming at 17500 on 30% heli fuel

Frank S.
http://airscharnell.com/

< Message edited by AirScharnell -- 9/10/2007 3:01:58 PM >

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