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#31
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"Bart D. Hull" wrote ...
There was a BD-5J that was used as the "Coors Silver Bullet" and then was used for shows at Oshkosh, etc. I could see that particular BD-5 as having more than 350 hours on it. I don't know if this particular bird is still flying. After each airshow, the wings were pulled off and it was put in a trailer. Makes sense as far as having a car and tools at the airshow as well as your plane. There's a dirty little secret about the Microturbo TRS 18 engine used in the BD-5J that the owners don't like to talk about. It only gets 50 hours between hot section overhauls and a hot section overhaul costs $5,000. The plane is trailered to airshows because the owners don't want to pay the $100 per hour in maintenance costs for the hot section. Well, that and the fact that the airplane doesn't even have enough fuel for VFR reserves when it takes off. Juan's engine, the Microturbo Cougar, on the other hand is a different sort of animal. It was designed for target drones and has a much lower thrust rating. Basically it's a disposable engine but if he ever gets it flying he'll sell it and the airframe to you for $100,000. Rich |
#32
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Jeff
Excellent looking bird (and flies to ).Unless you told someone, your mods still let it look 'classic' and not like some of the ones with 'warts all over them. How do you cool. Scoop looks small. Do you have a fan on radidtor or some other method? I see the louvers just ahead of the tail skid but such a small area wonder how you get enough air out to keep all cool and exit properly? Big John On Sun, 16 Nov 2003 03:43:46 GMT, "Jeff Schroeder" wrote: With all of the invective, misinformation, pie in the sky hope, personal grudges, and ignorant opinion that has made its way into the BD-5 dialogue over the years, I've tried to state the facts as I know them, and help others avoid mistakes. (like choosing to build a 5 in the first place, rather than something more useful for the labor involved) This plane, regardless of its faults, will be with us for some time as it is one of the most facinating , notorious designs ever created. As many of us have discovered, a rational examination of your abilities and needs has little to do with the homebuilt design chosen. For example, I mostly fly locally, but still want a ViperJet, Turbine Legend, or L-39. I ended up with the 5 because I got the basic Bede incomplete kit for $ 500 from someone who never started it. I figured it was like a big model, and could be finished in a year or so. I was bullheaded enough, (and had a lot of shop experience) to be able to keep going until it was done. I was curious enough, and fortunate, to research it fully, and make several critical mods during construction. This plane REQUIRES that the builder thoroughly understand its history, and the experiences of others over the years, before doing your own. For photos of mine, and some experiences testing it, go to the HomebuiltAirplanes.com site and look under the Completions and Flying Techniques forum headings. I'm not sure how big mine are by comparison, but want to keep them just the same! ;-) Jeff Schroeder "- Barnyard BOb -" wrote in message .. . Kudos, Jeff... For what gotta' be the most forthright post I've ever read from a BD5 builder - owner - pilot. You got big 'balls', my man. My hat's off to ya'. g This post is a KEEPER fer me. Outstanding and a pure delight to read. [Even if you're pulling my leg.] You will keep us posted on how things go, right? Barnyard BOb - over 50 years of successful flight |
#33
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Mine cools great even on a 90 deg. day. This, however, took a lot of work.
Total air inlet area is 12 sq. in. divided between flush wingroot openings. Air exits through an adjustable P-51 style outlet under the tail (30 sq. in.) A standard Rotax radiator in mounted in a plenum behind the seat. There is a second one (postal truck heater core) mounted horizontally under the quill shaft in the back of the engine compartment. Both have ground cooling fans. The airpath diverges from the inlets to the exhaust with smooth curves and ramps for the air to follow. Cooling airflow can stall around sharp corners and cause drag and poor flow internally. This is why many installation of this type don't work well. The louvers, and a small air outlet on the left side of the engine compartment door allow some air to flow around the exhaust pipe and muffler and take that heat away from the rear radiator. The main external mods visible are a raised stabilator, and making the aft fuselage trailing edge match the rudder TE. This BD also has a wing LE cuff, and fuselage stretch. These little planes are somewhat of an obsession to those of us who should have some more common sense! Jeff "Big John" wrote in message ... Jeff Excellent looking bird (and flies to ).Unless you told someone, your mods still let it look 'classic' and not like some of the ones with 'warts all over them. How do you cool. Scoop looks small. Do you have a fan on radidtor or some other method? I see the louvers just ahead of the tail skid but such a small area wonder how you get enough air out to keep all cool and exit properly? Big John On Sun, 16 Nov 2003 03:43:46 GMT, "Jeff Schroeder" wrote: With all of the invective, misinformation, pie in the sky hope, personal grudges, and ignorant opinion that has made its way into the BD-5 dialogue over the years, I've tried to state the facts as I know them, and help others avoid mistakes. (like choosing to build a 5 in the first place, rather than something more useful for the labor involved) This plane, regardless of its faults, will be with us for some time as it is one of the most facinating , notorious designs ever created. As many of us have discovered, a rational examination of your abilities and needs has little to do with the homebuilt design chosen. For example, I mostly fly locally, but still want a ViperJet, Turbine Legend, or L-39. I ended up with the 5 because I got the basic Bede incomplete kit for $ 500 from someone who never started it. I figured it was like a big model, and could be finished in a year or so. I was bullheaded enough, (and had a lot of shop experience) to be able to keep going until it was done. I was curious enough, and fortunate, to research it fully, and make several critical mods during construction. This plane REQUIRES that the builder thoroughly understand its history, and the experiences of others over the years, before doing your own. For photos of mine, and some experiences testing it, go to the HomebuiltAirplanes.com site and look under the Completions and Flying Techniques forum headings. I'm not sure how big mine are by comparison, but want to keep them just the same! ;-) Jeff Schroeder "- Barnyard BOb -" wrote in message .. . Kudos, Jeff... For what gotta' be the most forthright post I've ever read from a BD5 builder - owner - pilot. You got big 'balls', my man. My hat's off to ya'. g This post is a KEEPER fer me. Outstanding and a pure delight to read. [Even if you're pulling my leg.] You will keep us posted on how things go, right? Barnyard BOb - over 50 years of successful flight |
#34
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Thanks Jeff
Your comments all make sense and understand what you did. Someone in a prior post commented about vision, particularly landing, due to reclined position in the '5. People forget that in the heavy iron in WWII there wasn't any forward vision on the take off (until you got tail up) and landing to clear ahead. When we flared and lost runway at 12 o'clock we transitioned to a quartering side view (I normally used the left side). Adjusted height as needed looking at R/W surface and tracked using the edge of the R/W or lines on R/W. Thousands did this so I'd not think it a unsurmountable problem now in the '5. Fly safe. Have fun Big John On Mon, 17 Nov 2003 18:31:10 GMT, "Jeff Schroeder" wrote: Mine cools great even on a 90 deg. day. This, however, took a lot of work. Total air inlet area is 12 sq. in. divided between flush wingroot openings. Air exits through an adjustable P-51 style outlet under the tail (30 sq. in.) A standard Rotax radiator in mounted in a plenum behind the seat. There is a second one (postal truck heater core) mounted horizontally under the quill shaft in the back of the engine compartment. Both have ground cooling fans. The airpath diverges from the inlets to the exhaust with smooth curves and ramps for the air to follow. Cooling airflow can stall around sharp corners and cause drag and poor flow internally. This is why many installation of this type don't work well. The louvers, and a small air outlet on the left side of the engine compartment door allow some air to flow around the exhaust pipe and muffler and take that heat away from the rear radiator. The main external mods visible are a raised stabilator, and making the aft fuselage trailing edge match the rudder TE. This BD also has a wing LE cuff, and fuselage stretch. These little planes are somewhat of an obsession to those of us who should have some more common sense! Jeff "Big John" wrote in message .. . Jeff Excellent looking bird (and flies to ).Unless you told someone, your mods still let it look 'classic' and not like some of the ones with 'warts all over them. How do you cool. Scoop looks small. Do you have a fan on radidtor or some other method? I see the louvers just ahead of the tail skid but such a small area wonder how you get enough air out to keep all cool and exit properly? Big John On Sun, 16 Nov 2003 03:43:46 GMT, "Jeff Schroeder" wrote: With all of the invective, misinformation, pie in the sky hope, personal grudges, and ignorant opinion that has made its way into the BD-5 dialogue over the years, I've tried to state the facts as I know them, and help others avoid mistakes. (like choosing to build a 5 in the first place, rather than something more useful for the labor involved) This plane, regardless of its faults, will be with us for some time as it is one of the most facinating , notorious designs ever created. As many of us have discovered, a rational examination of your abilities and needs has little to do with the homebuilt design chosen. For example, I mostly fly locally, but still want a ViperJet, Turbine Legend, or L-39. I ended up with the 5 because I got the basic Bede incomplete kit for $ 500 from someone who never started it. I figured it was like a big model, and could be finished in a year or so. I was bullheaded enough, (and had a lot of shop experience) to be able to keep going until it was done. I was curious enough, and fortunate, to research it fully, and make several critical mods during construction. This plane REQUIRES that the builder thoroughly understand its history, and the experiences of others over the years, before doing your own. For photos of mine, and some experiences testing it, go to the HomebuiltAirplanes.com site and look under the Completions and Flying Techniques forum headings. I'm not sure how big mine are by comparison, but want to keep them just the same! ;-) Jeff Schroeder "- Barnyard BOb -" wrote in message .. . Kudos, Jeff... For what gotta' be the most forthright post I've ever read from a BD5 builder - owner - pilot. You got big 'balls', my man. My hat's off to ya'. g This post is a KEEPER fer me. Outstanding and a pure delight to read. [Even if you're pulling my leg.] You will keep us posted on how things go, right? Barnyard BOb - over 50 years of successful flight |
#35
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Over the nose visibility isn't too bad in the BD-5. You do lose the
straight ahead view in the flare, but the nose is narrow enough that you don't have to look off to the side very much. In flight vis is like a sailplane; Great! The biggest problem for me has been flaring too high and plopping it in. You sit so low to the ground (there's that lack of crashworthiness) that its tough to wait until you're low enough before pulling back. It seems best to just level off with slight backpressure and let it settle in. The other visual problem is waiting until you have enough airspeed before attempting to lift off. The low viewpoint makes you think you're going a lot faster than you really are. (go-kart effect) Jeff "Big John" wrote in message ... Thanks Jeff Your comments all make sense and understand what you did. Someone in a prior post commented about vision, particularly landing, due to reclined position in the '5. People forget that in the heavy iron in WWII there wasn't any forward vision on the take off (until you got tail up) and landing to clear ahead. When we flared and lost runway at 12 o'clock we transitioned to a quartering side view (I normally used the left side). Adjusted height as needed looking at R/W surface and tracked using the edge of the R/W or lines on R/W. Thousands did this so I'd not think it a unsurmountable problem now in the '5. Fly safe. Have fun Big John |
#36
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Over the nose visibility isn't too bad in the BD-5. You do lose the straight ahead view in the flare, but the nose is narrow enough that you don't have to look off to the side very much. In flight vis is like a sailplane; Great! The biggest problem for me has been flaring too high and plopping it in. You sit so low to the ground (there's that lack of crashworthiness) that its tough to wait until you're low enough before pulling back. It seems best to just level off with slight backpressure and let it settle in. The other visual problem is waiting until you have enough airspeed before attempting to lift off. The low viewpoint makes you think you're going a lot faster than you really are. (go-kart effect) Jeff ++++++++++++++++++++++++++++++++++ The good new is - After the first 100 hours.... You won't even notice these effects. bfg You don't wanna know the bad news. Barnyard BOb - over 500 RV3 hours |
#37
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Jeff
Have you gone and talked to the race car people about cockpit crash worthiness? They build light and strong and their techniques might be applicable to your bird (and BD-5's)? Might give some comfort being so close to ground and going so fast? Big John On Tue, 18 Nov 2003 03:14:10 GMT, "Jeff Schroeder" wrote: Over the nose visibility isn't too bad in the BD-5. You do lose the straight ahead view in the flare, but the nose is narrow enough that you don't have to look off to the side very much. In flight vis is like a sailplane; Great! The biggest problem for me has been flaring too high and plopping it in. You sit so low to the ground (there's that lack of crashworthiness) that its tough to wait until you're low enough before pulling back. It seems best to just level off with slight backpressure and let it settle in. The other visual problem is waiting until you have enough airspeed before attempting to lift off. The low viewpoint makes you think you're going a lot faster than you really are. (go-kart effect) Jeff "Big John" wrote in message .. . Thanks Jeff Your comments all make sense and understand what you did. Someone in a prior post commented about vision, particularly landing, due to reclined position in the '5. People forget that in the heavy iron in WWII there wasn't any forward vision on the take off (until you got tail up) and landing to clear ahead. When we flared and lost runway at 12 o'clock we transitioned to a quartering side view (I normally used the left side). Adjusted height as needed looking at R/W surface and tracked using the edge of the R/W or lines on R/W. Thousands did this so I'd not think it a unsurmountable problem now in the '5. Fly safe. Have fun Big John |
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