RotaxEngines-List Digest Archive

Wed 01/20/10


Total Messages Posted: 21



Today's Message Index:
----------------------
 
     1. 01:45 AM - Re: More on ethanol (dave)
     2. 06:05 AM - Re: More on ethanolMore on ethanol (catz631@aol.com)
     3. 06:30 AM - Prop bolts (catz631@aol.com)
     4. 06:31 AM - Re: More on ethanolMore on ethanol (tom463@aol.com)
     5. 06:48 AM - Re: Prop bolts (lucien)
     6. 06:57 AM - Re: More on ethanolMore on ethanol (lucien)
     7. 06:59 AM - Re: oozing valve covers (Peter Thomson)
     8. 07:22 AM - Re: More on ethanolMore on ethanol (Hugh MCKAY III)
     9. 07:22 AM - Re: Re: More on ethanol (blumax008@aol.com)
    10. 07:37 AM - Re: Prop bolts (Bob Borger)
    11. 08:31 AM - Re: Re: More on ethanol (Dave Fisher)
    12. 08:36 AM - Rotax 582 Carb icing (Dave Fisher)
    13. 01:54 PM - Re: Prop bolts (Roger Lee)
    14. 05:29 PM - Re: Re: More on ethanol (FLYaDIVE)
    15. 05:44 PM - Re: Re: More on ethanol (Dave Austin)
    16. 05:48 PM - Re: Re: Exhaust wrap/insulation ? (Noel Loveys)
    17. 05:58 PM - Re: Exhaust wrap/insulation ? (Roger Lee)
    18. 05:58 PM - Re: Prop bolts (Roger Lee)
    19. 06:06 PM - Re: oozing valve covers (Roger Lee)
    20. 07:03 PM - Re: More on ethanolMore on ethanol (Noel Loveys)
    21. 08:09 PM - Re: Re: More on ethanol (E. D. Eliot)
 
 
 


Message 1


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    Time: 01:45:05 AM PST US
    Subject: Re: More on ethanol
    From: "dave" <dave@cfisher.com>
    [quote="blumax008(at)aol.com"]In a message dated 1/18/2010 6:47:36 A.M. Eastern Standard Time, dave@cfisher.com writes: > I have 8 other aircraft at my strip that all are 2 strokes and use regular grade gas with ethanol or what ever the cheapest station sells. No problems yet. > Keep your fingers crossed. You're an exception to the rule. Are you using any sort of additive? > [b] No additives at all. Just regular grade 87 I guess. What ever I get 98% of it goes in throught a filter with a screen . I had a can of gas about 3 months old I found in hanger on weekend that came back from cottage in Oct ( it could have been bought in summer too ) I only had about 2 gallons left in plane so I dumped in 5 gallons . WOrked fine but on a few full power pull ups I think that Iheard some pinging twice under load only. EGTs running abit high right now but I am still on summer needle settings and prop a tad course still so this keeps the load on engine and EGTs close to in line. I hear about tank issues with fiberglass but have not see any yet. If I do I will try these likely www.wingtanks.com Dave -------- Rotax Dealer, Ontario Canada http://www.cfisher.com/ Awesome *New Forum * http://rotaxaircraft.com/forum/ Realtime Kitfox movies to separate the internet chatter from the truth http://www.youtube.com/profile_videos?user=kitfoxflyer Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282406#282406


    Message 2


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    Time: 06:05:56 AM PST US
    From: catz631@aol.com
    Subject: Re: More on ethanolMore on ethanol
    Noel, The carbs on my British cars have all been rebuilt with alcohol resistant rubber. The problem with the bad running has to do with the age of the fuel. In a few weeks the fuel turns to "sour milk" ! Draining all the fuel and refilling solves the problem of bad running (until the next time) In referance to the dieseling in my aircraft, I poured Lucas Racing Octane booster in my airplane tanks, shook the tar out of the wings to mix, and then flew it. This was the same load of fuel that dieseled on me three times at shut down previously. I have since flown the airplane a few times without adding fuel and it has not dieseled. It made a believer out of me. If I cannot fly the aircraft enough to keep recycling the fuel then I will use the octane booster. I am also starting to use premium vs regular in my aircraft, in an effort to lengthen the life of the fuel. My engine only requires regular. Dick Maddux 912UL Milton,Fl


    Message 3


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    Time: 06:30:04 AM PST US
    From: catz631@aol.com
    Subject: Prop bolts
    The prop flange is part of the engine so I thought I would bring this up here. I am replacing the prop on my aircraft with a Kiev prop (removing my Warp) The prop flange looks like a "swiss cheese" on my older Rotax 912. I have three sizes of holes. The outer holes are bigger and with the Warp I used prop bushings. The Kiev uses 6 of the inner holes (out of the 12) All of the inner holes are threaded and are two different sizes. The ones I use for the Kiev hub take an 8mm bolt as did the Warp (with the bushes) Confused yet ?....me too Anyway,I am trying to find good grade 8 ,8mm bolts. The importer says the Chinese are the only ones that have 8mm prop bolts. I don't want to use Chinese prop bolts. I know AN bolts are not metric but does anyone know where I can get the proper bolts ? Thanks ! Dick Maddux 912UL Milton,Fl


    Message 4


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    Time: 06:31:34 AM PST US
    From: tom463@aol.com
    Subject: Re: More on ethanolMore on ethanol
    The 200 hour service on my one-year-old Rotax 912ULS run on 93 Octane 10% Ethanol showed significant flaking of the carburetor floats. I now drive 30 miles each way to get non-ethanol gas. Could have been a bad batch of resin used to make the floats, or could have been the Ethanol. Can't afford the risk, no more Ethanol!!!! Tom N569AT Florida


    Message 5


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    Time: 06:48:35 AM PST US
    Subject: Re: Prop bolts
    From: "lucien" <lstavenhagen@hotmail.com>
    [quote="Dick Maddux"]The prop flange is part of the engine so I thought I would bring this up here. I am replacing the prop on my aircraft with a Kiev prop (removing my Warp) The prop flange looks like a "swiss cheese" on my older Rotax 912. I have three sizes of holes. The outer holes are bigger and with the Warp I used prop bushings. The Kiev uses 6 of the inner holes (out of the 12) All of the inner holes are threaded and are two different sizes. The ones I use for the Kiev hub take an 8mm bolt as did the Warp (with the bushes) Confused yet ?....me too Anyway,I am trying to find good grade 8 ,8mm bolts. The importer says the Chinese are the only ones that have 8mm prop bolts. I don't want to use Chinese prop bolts. I know AN bolts are not metric but does anyone know where I can get the proper bolts ? Thanks ! Dick Maddux 912UL Milton,Fl > [b] Aircraft grade metric hardware is unavailable in the US. I've looked everywhere for it in the past and got only puppy-dog looks from everyone I've ever asked about it. So forget it ;) Your only choice is grade 8.8 8MM bolts available at hardware stores and fastener outfits like Fastenal (highly recommended). Fortunately, those fasteners work just fine, they're plenty strong and the QC on them is generally good enough. Do NOT use aluminum hardware _with backing locknuts only_ - they're not strong enough with only backing nuts. Don't ask me why I know this. If they thread into something substantial, such as the threads in the prop flange or the lugs in the outer ring if equipped, they'll be fine. 5/16" grade 5 is another option for the unthreaded holes. AN5 bolts with AN locknuts should work too, tho the tightening torque specified for most props are for coarse thread. AN bolts/nuts are UNF so you'd have to adjust the tightening torque accordingly to get the same preload. LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282447#282447


    Message 6


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    Time: 06:57:48 AM PST US
    Subject: Re: More on ethanolMore on ethanol
    From: "lucien" <lstavenhagen@hotmail.com>
    [quote="tom463(at)aol.com"]The 200 hour service on my one-year-old Rotax 912ULS run on 93 Octane 10% Ethanol showed significant flaking of the carburetor floats. I now drive 30 miles each way to get non-ethanol gas. Could have been a bad batch of resin used to make the floats, or could have been the Ethanol. Can't afford the risk, no more Ethanol!!!! Tom N569AT Florida > [b] The floats should be OK with ethanol. As per the Rotax bulletin posted this summer, there should be nothing inside the engine that can't deal with up to 10% ethanol. The flaking in your case I suspect was probably due to something else (I've heard of this before even where pure gas was being used). LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282450#282450


    Message 7


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    Time: 06:59:39 AM PST US
    Subject: Re: oozing valve covers
    From: Peter Thomson <peterlthomson@gmail.com>
    500hrs, no oil leaks, runs cold Peter CH710SP/912ULS


    Message 8


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    Time: 07:22:08 AM PST US
    From: Hugh MCKAY III <hgmckay@bellsouth.net>
    Subject: Re: More on ethanolMore on ethanol
    Tom:=0A=0AYour problem may not be the Ethanol. It may be simply a set of ba d floats from the manufacturer. Carefully read and follow Rotax Service Ins truction SI-912-021, and without question replace the floats! The internal Carb.-floats should be fine using fuel with up to 10% Ethanol.=0A=0AHugh McKay=0ARotax 912 UL=0A=0A=0A=0A=0A________________________________=0AFrom: "tom463@aol.com" <tom463@aol.com>=0ATo: rotaxengines-list@matronics.com=0A Sent: Wed, January 20, 2010 9:25:52 AM=0ASubject: Re: RotaxEngines-List: Mo re on ethanolMore on ethanol=0A=0AThe 200 hour service on my one-year-old R otax 912ULS run on 93 Octane 10% Ethanol showed significant flaking of the carburetor floats.- I now drive 30 miles each way to get non-ethanol gas. - Could have been a bad batch of resin used to make the floats, or could have been the Ethanol.- Can't afford the risk, no more Ethanol!!!!=0A=0AT ===


    Message 9


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    Time: 07:22:08 AM PST US
    From: blumax008@aol.com
    Subject: Re: More on ethanol
    In a message dated 1/20/2010 4:46:01 A.M. Eastern Standard Time, dave@cfisher.com writes: I hear about tank issues with fiberglass but have not see any yet. Here's a strange one for you. I have a DFS trike with a fiberglass fuel tank. BEFORE I started using Ethanol laced fuel, it was leaking fuel. AFTER I began using Ethanol fuel...it stopped leaking! So Ethanol is good for something after all! It melts fiberglass fuel tanks & stops leaks!


    Message 10


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    Time: 07:37:28 AM PST US
    From: Bob Borger <rlborger@mac.com>
    Subject: Re: Prop bolts
    Dick, McMaster-Carr has Grade 8.8, DIN 931 (1.25 pitch, partially threaded) and DIN 960 (1.00 pitch, partially threaded) metric bolts. I have no idea where they are manufactured. I have no idea if they are exactly what you need for prop bolts. But you can check them out and see what you think. http://www.mcmaster.com/ Go to Cap Screws. Scroll down and select Metric under "System of Measurement." Select Class 8.8 under "Material." See what they have from there.. Good luck, Bob Borger Europa XS Monowheel, Intercooled Rotax 914, Airmaster C/S prop On Wednesday, January 20, 2010, at 08:20AM, <catz631@aol.com> wrote: >


    Message 11


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    Time: 08:31:29 AM PST US
    From: "Dave Fisher" <dave@cfisher.com>
    Subject: Re: More on ethanol
    Good one !! You should post that here http://rotaxaircraft.com/forum/viewforum.php?f=35 Ethanol thread Glad to hear !! ----- Original Message ----- From: blumax008@aol.com To: rotaxengines-list@matronics.com Sent: Wednesday, January 20, 2010 10:21 AM Subject: Re: RotaxEngines-List: Re: More on ethanol In a message dated 1/20/2010 4:46:01 A.M. Eastern Standard Time, dave@cfisher.com writes: I hear about tank issues with fiberglass but have not see any yet. Here's a strange one for you. I have a DFS trike with a fiberglass fuel tank. BEFORE I started using Ethanol laced fuel, it was leaking fuel. AFTER I began using Ethanol fuel...it stopped leaking! So Ethanol is good for something after all! It melts fiberglass fuel tanks & stops leaks!


    Message 12


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    Time: 08:36:38 AM PST US
    From: "Dave Fisher" <dave@cfisher.com>
    Subject: Rotax 582 Carb icing
    http://rotaxaircraft.com/forum/viewtopic.php?f=5&t=168&start=0


    Message 13


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    Time: 01:54:43 PM PST US
    Subject: Re: Prop bolts
    From: "Roger Lee" <ssadiver1@yahoo.com>
    Hi Dick, Believe it or not Ace Hardware has the metric grade 8.8. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282558#282558


    Message 14


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    Time: 05:29:38 PM PST US
    Subject: Re: More on ethanol
    From: FLYaDIVE <flyadive@gmail.com>
    That is SCARY! Think what is happening that would cause it to stop leaking? Some thing is swelling ... E10 will cause that in FIBERGLASS. Notice I say fiberglass, not EPOXY. There are some EPOXYs that can handle E10. Barry On Wed, Jan 20, 2010 at 10:21 AM, <blumax008@aol.com> wrote: > In a message dated 1/20/2010 4:46:01 A.M. Eastern Standard Time, > dave@cfisher.com writes: > > I hear about tank issues with fiberglass but have not see any yet. > > Here's a strange one for you. I have a DFS trike with a fiberglass fuel > tank. BEFORE I started using Ethanol laced fuel, it was leaking fuel. AFTER > I began using Ethanol fuel...it stopped leaking! > > So Ethanol is good for something after all! It melts fiberglass fuel tanks > & stops leaks! > > * > > * > >


    Message 15


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    Time: 05:44:52 PM PST US
    From: "Dave Austin" <daveaustin2@primus.ca>
    Subject: Re: More on ethanol
    How does a vinyl-ester gas tank handle ethanol as apposed to epoxy or poly? Anyone know? Dave Austin


    Message 16


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    Time: 05:48:41 PM PST US
    From: "Noel Loveys" <noelloveys@yahoo.ca>
    Subject: Re: Exhaust wrap/insulation ?
    Where do you get the wrap? I was thinking like the bikes where the exhaust is wrapped from stem to stern. The short bit you describe wouldn't cause an internal overheat. Noel -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: January 20, 2010 12:19 AM Subject: RotaxEngines-List: Re: Exhaust wrap/insulation ? On our exhaust we are only covering about 15" of exhaust so it does not effect EGT's at all. You wrap from the exhaust port at the cylinder and only down over the knuckle by the springs. I have done many and have never had any issues or complaints and I keep doing more as people keep requesting it. I have one to do Jan. 30 from a guy out of San Antonio. I'll pull the engine and put on a firewall blanket, Matco brakes, pull the wings for an inspection and an engine inspection. Just don't cover or have the wrap around the EGT probes. To apply anti-seize you loosen the clamp at the knuckle slide the wrap up some and drop or pull away the muffler an few inches. Then pull the wrap back the 1"-1.5" you moved it and re-clamp. If you land and pull off your cowling would you grab your exhaust pipe? Not with any common since no one would, but with the wrap I can put my hand on it. They Mfg. of the wrap claims it reduces radiated heat by 70%. I don't know how accurate that number is, but what a difference. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282377#282377


    Message 17


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    Time: 05:58:08 PM PST US
    Subject: Re: Exhaust wrap/insulation ?
    From: "Roger Lee" <ssadiver1@yahoo.com>
    The header warp is called just that. It comes in 1" and 2" wide rolls and 50' long. Just use the 2". It comes in a light tan color or a darker black color. Either will work, but I would recommend the black as it has a nice protective coating already applied. Some want you to paint the light tan for a coating, but it is not that big a deal for us. Racers or high performance guys use this to eek out more HP. They wrap from the exhaust port all the way down the entire exhaust. This keeps the exhaust gases hot and makes them exit the exhaust pipe faster. If your pipes are not wrapped like our passenger cars then the exhaust gas cools and slows down in the pipe which robs a small amount of HP. Not enough for us to worry about. The high performance guys want it all. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282597#282597


    Message 18


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    Time: 05:58:28 PM PST US
    Subject: Re: Prop bolts
    From: "Roger Lee" <ssadiver1@yahoo.com>
    Hi Dick, Ace Hardware has these bolts in metric. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282598#282598


    Message 19


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    Time: 06:06:46 PM PST US
    Subject: Re: oozing valve covers
    From: "Roger Lee" <ssadiver1@yahoo.com>
    The oil leaks that I'm talking about don't come from an over heat or a hot engine. They are vibration caused or the cast valve covers have high and low spots. I think I have a good solution that seems to be working well. Sand the valve covers on a flat surface with some 220 grit to make sure the surface is flat all the way around the valve cover. Don't be afraid it takes more than a couple of strokes. Clean the "O" ring groves and mating metal surfaces with a solvent. The put the "O" rings in place and coat them with Loctite 574 (orange), both the "O" ring side and the engine mating surface. You do not need to glob it on, but a film around both surfaces and the small "O" ring in the center where the valve cover screw goes through. Them re-mount the valve cover and torque to 115 in/lbs. The normal torque is 105 in/lbs so the additional 10 in/lbs won't hurt anything. So far very good success. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=282602#282602


    Message 20


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    Time: 07:03:15 PM PST US
    From: "Noel Loveys" <noelloveys@yahoo.ca>
    Subject: More on ethanolMore on ethanol
    Thanks Dick I've had more than a little experience with the English cars and, thank god, no experience with ethanol fuel... My recommendation to you would be to add a sump drain at the lowest point of your fuel system and drain the tanks after every flight... do the same with your car. Ethanol evaporates faster than the gas it's in and that changes your fuel doublequick... Best thing is not to have it there. If your car is old enough a little 100LL probably wouldn't hurt either. I'm looking for some good octane booster for my Miata... It only has a ten gal tank (45L) and most of the local pumps have gone unisex... one nozzle for three grades of gas. The hose and internal plumbing are supposed to take almost two gallons to fill which means that for a dry tank I end up with 20% low octane gas. The engine is around 11:1 CR and doesn't like low octanes at all! About the Miata, one of the first 224 in North America, I'd swap it today for an MG... TF or TD... I'd think long and hard about a model A too even though I'm not fussy about the front suspension on that car. Noel From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of catz631@aol.com Sent: January 20, 2010 10:35 AM Subject: Re: RotaxEngines-List: More on ethanolMore on ethanol Noel, The carbs on my British cars have all been rebuilt with alcohol resistant rubber. The problem with the bad running has to do with the age of the fuel. In a few weeks the fuel turns to "sour milk" ! Draining all the fuel and refilling solves the problem of bad running (until the next time) In referance to the dieseling in my aircraft, I poured Lucas Racing Octane booster in my airplane tanks, shook the tar out of the wings to mix, and then flew it. This was the same load of fuel that dieseled on me three times at shut down previously. I have since flown the airplane a few times without adding fuel and it has not dieseled. It made a believer out of me. If I cannot fly the aircraft enough to keep recycling the fuel then I will use the octane booster. I am also starting to use premium vs regular in my aircraft, in an effort to lengthen the life of the fuel. My engine only requires regular. Dick Maddux 912UL Milton,Fl


    Message 21


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    Time: 08:09:28 PM PST US
    From: "E. D. Eliot" <gr8pugs@hotmail.com>
    Subject: Re: More on ethanol
    Sold it - sorry. From: dave@cfisher.com Subject: Re: RotaxEngines-List: Re: More on ethanol Good one !! You should post that here http://rotaxaircraft.com/forum/viewforum.php?f=35 Ethanol thread Glad to hear !! ----- Original Message ----- From: blumax008@aol.com To: rotaxengines-list@matronics.com Sent: Wednesday=2C January 20=2C 2010 10:21 AM Subject: Re: RotaxEngines-List: Re: More on ethanol In a message dated 1/20/2010 4:46:01 A.M. Eastern Standard Time=2C dave@c fisher.com writes: I hear about tank issues with fiberglass but have not see any yet. Here's a strange one for you. I have a DFS trike with a fiberglass fuel tank. BEFORE I started using Ethanol laced fuel=2C it was leaking fuel. A FTER I began using Ethanol fuel...it stopped leaking! So Ethanol is good for something after all! It melts fiberglass fuel tanks & stops leaks! href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.ma tronics.com/Navigator?RotaxEngines-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c _________________________________________________________________ Hotmail: Trusted email with Microsoft=92s powerful SPAM protection.




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