Kolb-List Digest Archive

Sun 12/31/06


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 08:41 AM - 2006 FireFly Flight Stats (Jack B. Hart)
     2. 12:15 PM - tires for US (Dana Hague)
     3. 12:57 PM - Re: Full enclosure (planecrazzzy)
     4. 02:43 PM - Re: Re: Full enclosure (robert bean)
     5. 04:57 PM - Re: tires for US (ron wehba)
     6. 10:31 PM - Off field landings - Do not archive. (possums)
 
 
 


Message 1


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    Time: 08:41:41 AM PST US
    From: "Jack B. Hart" <jbhart@onlyinternet.net>
    Subject: 2006 FireFly Flight Stats
    Kolbers, Raining so I can not fly on the last day of the year. From my flight log, I compiled the following numbers and significant FireFly mods. # of Total Average Year Flights Time Flight (hrs-min) 2006 59 24:09 0:26 2005 62 25:05 0:24 2004 117 44:38 0:23 2003 101 34:52 0:21 2002+ 82 14:11 0:10 2001 109 31:45 0:17 2000@ 74 29:07 0:24 1999*% 28 14:30 0:31 -------------------------- Totals 632^ 218:17 0:21 + March 28, 2002 - Removed Rotax 447 @ August 8, 2000 - Added VGs to the wings % October 28, 1999 - Removed 15 inch chord ailerons * September 9, 1999 - First flight ^ Rotax 447/79 hours - Victor 1+/139 hours It makes one very thankful that we live in a country that lets people fly under 103-7. It still feels almost too good to be true. What a toy!!! Flew yesterday and among other things checked out a new hog barn operation, my granddaughter's school, a new addition to a grain elevator, and a new gas well. Lazed along at 4,900 rpm at 45 mphi so that I would not wind burn my face and burning a little over 1.6 gph. Life does not get much better than this. Wishing everyone fun and safe flying during the New Year. Jack B. Hart FF004 Winchester, IN


    Message 2


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    Time: 12:15:53 PM PST US
    From: Dana Hague <d-m-hague@comcast.net>
    Subject: tires for US
    What size tires does everybody use on their Ultrastars? My dilemma: The plane came with 6.00x6 aircraft tires on 6" wide wheels. Problem is, it doesn't fit in the trailer (it's 2" too wide). The wheels are part of the wheel / hydraulic brake package from Free Bird Innovations, which looks like a very nice package. According to the previous owner, he used the same tires that he previously had on 4" wide wheels. I then ordered a pair of 4" wide wheels from Free Bird. When I went to put the old tires on the new wheels, they look awfully wide for those wheels (not to mention in not too great condition), so I figure I oughta get narrower tires... but what size? The current tires are around 16" diameter; 400X6 tires from Aircraft Spruce are 13" diameter and I hate to lose prop ground clearance. Or should I just be looking at industrial tires? Also the current tires have tubes, but the new wheels have valve stems for tubeless tires... I always thought you never use tubeless tires on aircraft? -Dana -- -- C:\Planets\Earth\ is 99% full. Please delete unnecessary people.


    Message 3


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    Time: 12:57:23 PM PST US
    Subject: Re: Full enclosure
    From: "planecrazzzy" <planecrazzzy@yahoo.com>
    At this point , it's "Flyable" , But not done yet ... Working on the Front / Side pieces now... Update : http://wingsforum.com/viewtopic.php?p=4965#4965 . . Gotta Fly... . . . -------- . . . . . Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=84714#84714 Attachments: http://forums.matronics.com//files/building_full_enclosure_021_270.jpg


    Message 4


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    Time: 02:43:33 PM PST US
    From: robert bean <slyck@frontiernet.net>
    Subject: Re: Full enclosure
    Nice work. Keep at it while you are still inspired. BB do not archive On 31, Dec 2006, at 3:56 PM, planecrazzzy wrote: > <planecrazzzy@yahoo.com> > > At this point , it's "Flyable" , But not done yet ... > > Working on the Front / Side pieces now... > > Update : > http://wingsforum.com/viewtopic.php?p=4965#4965 > . > . > > Gotta Fly... > . > . > . > > -------- > . > . > . > . > . > Do Not Archive > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=84714#84714 > > > Attachments: > > http://forums.matronics.com//files/building_full_enclosure_021_270.jpg > >


    Message 5


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    Time: 04:57:36 PM PST US
    From: "ron wehba" <rwehba@cebridge.net>
    Subject: Re: tires for US
    my old one had wheelbarrow tires and rims on it. ----- Original Message ----- From: "Dana Hague" <d-m-hague@comcast.net> Sent: Sunday, December 31, 2006 2:13 PM Subject: Kolb-List: tires for US > > What size tires does everybody use on their Ultrastars? > > My dilemma: The plane came with 6.00x6 aircraft tires on 6" wide wheels. > Problem is, it doesn't fit in the trailer (it's 2" too wide). The wheels > are part of the wheel / hydraulic brake package from Free Bird > Innovations, which looks like a very nice package. According to the > previous owner, he used the same tires that he previously had on 4" wide > wheels. I then ordered a pair of 4" wide wheels from Free Bird. When I > went to put the old tires on the new wheels, they look awfully wide for > those wheels (not to mention in not too great condition), so I figure I > oughta get narrower tires... but what size? The current tires are around > 16" diameter; 400X6 tires from Aircraft Spruce are 13" diameter and I hate > to lose prop ground clearance. Or should I just be looking at industrial > tires? > > Also the current tires have tubes, but the new wheels have valve stems for > tubeless tires... I always thought you never use tubeless tires on > aircraft? > > -Dana > -- > -- > C:\Planets\Earth\ is 99% full. Please delete unnecessary people. > > >


    Message 6


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    Time: 10:31:16 PM PST US
    From: possums <possums@bellsouth.net>
    Subject: Off field landings - Do not archive.
    Just to fill in the empty space. The Unplanned Landing By Ben Methvin...not me! Not Kolb related : -DELETE but we all have our own learning experiences. BTW ..Ben was one of my best students/instructors ...HaHa right John H ?? I've got better UPL'S - but due to limited space- why don't you guys post some yours? JUST FOR FUN. ------------------ By Ben Methvin: I have lots of glorious hours in Ultralights behind the Rotax family of engines. I have lots of unplanned landings over the last ten years. I have been very lucky. After my most recent landing in a sod field I am compelled to pass on some observations. Hanging upside down in an ultralight in a sod field focus the mind somewhat. My observations and some details of the causes follow: A Sod Field ' Mini Max 103 ' Engine Seizure While climbing out from an =93E=94 airport, the single cylinder 277 Rotax engine abruptly stopped. I had pulled the throttle back after reaching the first climb segment. Luck was with me and below was a beautiful sod field in a circular style due to the round-track sprinkler system. An easy dead-stick (I hate that expression) landing in one of the curved segments followed. The manager of the sod farm was most pleasant and said that I had not damaged his crop and offered any help to get me on my way. I turned the prop, heard a sharp metallic clink and found it turned easily with the reassuring feel of compression. I pulled on the prop and it started with a healthy sound. Thanking the nice man I took off and spiraled to an altitude sufficient to reach my home airport less than two miles away - if the engine again stopped. Landing at my home airport was uneventful. Observation: I was lucky twice. Once when I found the great field below me and the second when I broke one of my later rules of never taking off after an unexplained failure. Cause: Although the engine was running fine I checked the cylinder and piston and found a melted scar of aluminum on the wall of the piston. The engine has seized when I suddenly retarded the throttle. I later learned that this was not unusual and from then on retarded the throttle slowly whenever possible after a climb. A Cow Field ' Mini Max 103 ' Engine seizure Flying low levels in unoccupied fields is always fun but the low level severely limits the pilot=92s options should the engine quit. It quit at 50 feet AGL landing was immediate and fortunately into a pasture without much hoof damage. There was just enough residual energy to clear a fence before the flare. Landing was uneventful and the low time pilot (me) elected to start the engine and take off for the four-mile return to the airport. This was before cell phones. Luck again and the landing at the airport was uneventful. Observation: Again twice lucky. With only 50 feet of altitude there are almost no options except to =93Fly the Airplane=94 and to land straight ahead. The fence could easily have stopped this narrative. By flying the airplane and maintaining the airspeed I had just enough energy to Plop over the fence. Cause: Engine seizure (I have no idea why Rotax quit making the 277 but this might have had something to do with it.) Again a new piston and honed cylinder . A Front Yard ' Mini Max 103 ' Exhaust Springs failure While flying at 1000 feet AGL, suddenly heard loud exhaust noise and experienced a considerable loss of power. Below were pine trees, a small road, several farms and one tree-laden yard with what appeared to be enough room to land the Mini Max on part power. The yard was rough but was steeply up sloping to the house allowing a quick deceleration to a stop. After discussing my adventure with the owner of the field, I fixed the two broken springs and took off after carefully walking the takeoff path. Observations: Luck again. If at all possible land close to a house on property that is usually kept mowed and clean of obstructions. Also should you be hurt or need communications being close to a house is your best bet. Cause: Exhaust springs broke allowing exhaust to avoid the muffler. This resulted in over 50% loss of power. Excessive vibration of single cylinder 277 engine wore grooves in spring ends fast and required replacement more frequently than first thought necessary A Side Yard ' Mini-Max 103 ' Rotax 277 Exhaust Horn failure While leading a V formation of six other ultralights (the slowest guy is usually given the lead) I heard a loud exhaust noise followed by significant heat on my foot and one leg. I dropped out of the formation after announcing my plight and shut the engine down from fear of fire. I had 500 feet AGL this time and spotted a house with an up-sloping side yard that looked level but a bit short. Five guys above me in ultralights gave me conflicting advice as to where I might land. I told them in a nervous tone that I had already committed and they could only watch. The saw me land fast on the upslope and kick the Mini Max into a ground loop to keep from running into the fence at the end. Again did not hurt the airplane but needed a part to be welded. As luck would have it, the daughter of the man I was to meet at the airport only two miles way lived in the house I chose and she delivered me to the planned lunch and got to see her father who lived in another city. Her father landed in the same field to deliver me a welded part and broke the nose gear on his Challenger after hitting an unseen pothole. The 70-mile flight back to my home airport was uneventful. Observations: More Luck with landing field, mechanical help and friendly faces. Cause: Exhaust flange weld broke loose and allowed exhaust into the cockpit (open) and caused loss of power due lost back pressure needed for two stroke operation. A Beautiful Beach - Mini-Max 103 ' Rotax 277 Carburetor needle broke While part of a flight of other Ultralights at 300 AGL I experienced an abrupt engine failure. Close to my left was a Gulf of Mexico beach of white sand. I announced my intention to land on that beach and was met with a bunch of radio noise telling me it was prohibited. Explaining that it was not an option since my engine had quit they shut up and watched. I landed very close to the water, as I knew the sand would be much firmer there. A quick inspection of the carburetor revealed that the needle had become a nail and dropped down into the jet to shut off the fuel. The engine had only ten hours on it but the steel-retaining clip had milled the brass needle off and allowed the needle to drop. This was near the time when we began to add the =93O=94 ring. I first though I could use the old needle but found that I was using the lowest setting (richest) and there were no slots left. Fortunately a friend in a Phantom landed in front of me and produced from his fly-away-kit a new needle. Quickly replacing it we both took off before the authorities arrived. The 200-mile trip home was uneventful and an =93O=94ring was added. Observations: Luck again with the natural airport below and a friend with an extra needle. Up to that time I had not heard of the =93O=94 ring fix. A Grass Flying Field - Flightstar II ' Rotax 503 DCDI - Bearing failure 425 hours While teaching a student stalls at 2000 feet, the engine began making unseemly noises and lost power. The engine was shut off and the student was told that the lesson had just gone from stalls to emergency landings. A former helicopter pilot in Viet Nam, he made an unprintable statement as asked if this was for real. Explaining that this was for real he began to seek the best L/D speed of 55 and started looking for a suitable field. Not spotting one he turned to airplane over to me and an uneventful landing was made into a grass field where we had recently been practicing landings. In the excitement he had forgotten the safe field below us. The aircraft was flown out the same day after another 503 engine was installed. Observations: Experience and Good Instructors had taught me to perform maneuvers such as stalls only over a place where a safe landing could be made. Now that cell phones are in vogue it was easy to call a friend shortly after landing and buy his used 503 engine which he delivered and helped me install that same day. The student never came back. Cause: The engine, overhauled only one hundred hours before, suffered a bearing failure in one of the connecting rods (crankshaft end). No reason was found for the failure but it caused the writer to go longer than 300 hours before overhaul on subsequent engines with good results. A Weed Field ' FlightStar II ' Rotax 503 DCDI ' Throttle cable broke While teaching turns about a point and other ground reference maneuvers at 1500 feet AGL, the engine abruptly went to idle. The student advised that he had not pulled the throttle back. The lesson went from ground reference maneuvers to emergency landings. The student picked a rough pasture and began an approach on it. With the usual procedure I took over the airplane, suggested cinching up the seat belts and asked the student whose stomach protruded more than mine to suck it in just before the touchdown as I was going to need all the flare I could get. The landing beside a private home was uneventful as we both had pulled in our stomachs. Repairing the cable, I left the student beside the road and took off from the road in front of the house. Making careful note from the air as to where I had left him, I came back in a car for him. He did not come back for lessons. Observations: Practicing maneuvers over suitable landing sites again paid off. Including all parts of the throttle cable system on every pre-flight is a good idea now being included. Cause: The throttle cable had broken due to an installation that did not allow the keeper on the throttle cable to swivel on each application. This constant bending of the cable caused the break. A greased keeper which swivels is now being used. The Onion Field ' FlightStar II ' Rotax 582 - Spark Plugs While at a Fly-In, a friend asked that I give a Discovery ride to his son-in-law. Departing the main airport which was busy I flew to a close-by grass field to simulate a landing. During the climb-out from the small airport, the engine lost considerable power as if one cylinder had failed. The failure occurred at less than 300 feet AGL with hills and trees all about. Remembering a field we had just passed over I made a careful 180-degree back into it. I had not remembered that it sloped sharply downward from the direction we were committed to land. Upon touchdown and application of brakes it was apparent that the field was not going to be long enough so I attempted to ground loop this tricycle machine only to slide sideways over wet grass and wild onions. We hit the brush line at the end of the field with little inertia after hearing the wingtip smack a small sapling. We quickly exited the machine with no further misadventure. Cell phone to the rescue, we soon had friends and a trailer to recover the aircraft. No strong reason for the one cylinder stoppage was found but fouled plugs are suspected. The passenger became a student. Observations: A careful record of maintenance is good practice and will be mandatory when we transition over to Light Sport. The spark plugs in the forward cylinder appear to have been changed at the same time as the aft but showed signs of a substance on the electrodes which was unlike lead accretion. The substance appeared to be thread anti-seizure compound. The gap in the plug was not closed but was dirty and narrowed. A check of all other systems and the replacement of a fuel pump and the plugs returned the engine to good service. Cause: Possible over use and quantity of anti seize compound on the spark plugs. A Bean Field ' Flightstar II ' Rotax 582 ' 60 hours Shortly after climbing out of a grass field and reaching less than 400 feet AGL, the engine abruptly stopped. We were over trees but had just passed over bean fields. These fields were the best bet at our fast decent on this high-density altitude day. Advising a companion in another ultralight what we were about to do, and asking the passenger (owner) to call out airspeeds, we proceeded to land. It was not possible to line up exactly with the furrows but it was possible to line up into the light wind. We hit hard on the soft field and slid less than thirty feet before the tail went over and we ended up hanging from seatbelts. We made a quick exit as there was fuel dripping from the fuel tank vent just behind. come off and caused the sudden stoppage. The aircraft did not have an auxiliary electric pump and the squeeze pump was difficult to manipulate in the scant time allowed. The owner had planned to install an electric pump in the near future. Observation: The owner is known for his careful preflights but both he and the pilot missed the fact that the clamp on the engine side of the pulse line was not tight. There had been recent preventative maintenance in the area and it may have been loosened at that time. Cause: Failure to tighten the fuel pump pulse line. Cartersville Airport and Sod Farm Rotax 582 ' hours unknown While training the new owner of a Rotax powered RANS -6 the engine abruptly stalled and stopped. The aircraft was less than 200feet over the northern most end of the runway and almost at the end of the runway. It was impossible to land in the remaining length of the runway due to a sharply down-sloped approach to the runway. The sod field in view was reachable in a good L/D glide and caused a sense of complacency to this pilot of many previous out-landings. Soon it was apparent that maybe sod fields were not such a great place to land. The steel sprinkler system cuts deep ruts in its circular path. The sprinkler will destroy any small aircraft hitting it and the field was cut with water drainage ditches. Picking the best stretch of level grass I could find I guided the committed airplane down and gave out of aerodynamics and energy just in time to hit a ditch with the nose gear after a bounce from the mains. Again I was hanging by seat belts after an immediate stop from 30 to 40 mph. I will not soon forget the shock but the four point belts held. Immediately falling out of the airplane with offered help from my passenger I stood up to find that my jaw was no longer in alignment, my tongue was bitten in two places, one eye was not back on line and my chin hurt. This was my worst out-landing in what had promised to be a walk in the park. It scared the complacency and other things out of me. The airplane is still under repair. So am I. Cause The FAA sent a small team to investigate and both the owner and I were required to submit reports to the NTSB. In it the cause of the engine stoppage is not determined, but stop it did! The engine was sent to overhaul and thoroughly checked out. The fuel system and the electrical systems were carefully examined and no smoking gun found. Lesson: Do the best preflight you know how to do. Keep your equipment in good shape. http://www.georgiasportflyers.com/newsletters/Jan_2007%20GSFA%20Newsletter.p df




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