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#1
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Ack! My ACK!
"Well done, good and faithful servant" Mike, you handled this newsgroup
"situation" admirablely in my opinion (no doubt not worth much here). This web board is in desperate need of a modicum of civility (a large dose is probably to much to ask). It goes way beyond normal or reasonable bantering (the dialoge your posting provoked was mild by comparison to many others I've seen). Some here need to "get a life" and not find some sick gratification in insulting others just so they can be a "legend in their own minds". I'm sure I've said to much and the firestorm of insults will ensue. Fire away, There is only one opinion I care about and that is "HIS". If you dont agree with "HIM" its of absoluteley no consequence. Glasair 1-RG (240HP) |
#2
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#3
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What kind of engine do you have on your glassair? An O-470? I just can't
think of anything that gives 240 hp. I have an Angle valve Lyc. IO-360-C1D6, (forward facing injector) Stock it would put out 200HP. Its not stock, on the test stand/ Dyno it put out 241HP @2700 rpm. It has 10:1 compression (helicopter) pistons, its balanced, blueprinted, flowed and ported. It also has an modified cam profile to improve valve timing and one LSE electronic ignition. I am also using ram air. At max cruise of 225 knotts I expect to gain an inch or 2 of mp. I expect to do my first flight in 3 to 5 weeks. I started this project over 18 years ago. I took a 10 year hiatus since I was lacking time and money to finish it. I will have about 4,500 hours in it when finished. |
#4
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Fastglasair wrote:
I have an Angle valve Lyc. IO-360-C1D6, (forward facing injector) Stock it would put out 200HP. Its not stock, on the test stand/ Dyno it put out 241HP @2700 rpm. On the dyno was it driving all of the accessories? Stated a different way: Is that 241 an expected prop HP number when installed? It has 10:1 compression (helicopter) pistons, its balanced, blueprinted, flowed and ported. It also has an modified cam profile to improve valve timing and one LSE electronic ignition. I am also using ram air. At max cruise of 225 knotts I expect to gain an inch or 2 of mp. An inch or two of mercury from ram air at 225 kts? I think you're dreaming. Ideally speaking, dynamic pressure at 200 MPH is 104 pounds per square foot or about .722 psi. Each inch of mercury is 2.04 psi, so I'd expect just slightly less than one inch of MP *if* you had a perfect intake diffuser. Since a perfect intake diffuser is somewhat unlikely, I'd limit my expectations to about 0.5 inch MP. I expect to do my first flight in 3 to 5 weeks. I started this project over 18 years ago. I took a 10 year hiatus since I was lacking time and money to finish it. I will have about 4,500 hours in it when finished. Oy, that's a lot of persistence. Russell Kent |
#5
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FWIW...
Everybody that has been here any length of time accepts the fact I am an intolerant curmudgeon among other undesirable traits and qualities. Presumptuous statement, I and probably we just "tolerate" you, except when you have something significant to say. P.C. & Civility Maybe you can separate them, but the US Govt and I cannot. P.C. pertains to actual attitudes(opinions, beliefs etc.) which others have deemed appropriate or inappropriate. Civility pertains to how you communicate. If you don't agree with "HIM" its of absolutely no consequence. " I should have added the implied words, no consequence (to me). Judge not, lest ye be judged... comes to mind Granted, I can't judge your motives but it is reasonable to make judgments on actions or statements. I guess you could call it baiting, however, I just hoped the normal dialogue might get better. Best you look up how to spell all these many words before you get on your high horse requesting me to look up anything. You're coming off pretty damn lame and stupid. My only "sin" here is typing too fast and not doing a good proofread, since there is no spell check. Bob, I don't know how you carry such a heavy chip on your shoulder. You must be starting to look like the proverbial Hunch back of... |
#6
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"Russell Kent" wrote in message ... Otherwise, pretty good BOb. I'd give it an A. :-) I'll up that to A+ Bob, since I don't want to judje your spelling lest mine be judjed. Anyway, you might cut Mr. goody port-and-polished a little slack. After all, his first flight is coming up soon, and you can hardly blame him for currying favor if he thinks that might help. Plus, he claims to know the opinion of HIM, so I'm hoping he'll tell the rest of us the answer to that SUV thing. :-) Wayne (affiliated with the Church of the Get-a-Friend-to-Stand-by-with-an-Axe-and-Fire-Extinguisher) |
#7
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DBlumel wrote:
On the dyno was it driving all of the accessories? The only item missing was my 60 amp B&C alternator. I'll loose a little from that. Yeah, about 1.5 to 2 HP, depending on how much electrical load you have. BTW I am using a Whirlwind graphite wrapped hardwood laminate core 3 blade C.S. prop. 73 inch blades with a S.S. leading edge. It uses a McCauley hub. While the 3 blade props are generally more aesthetically pleasing, a coarser pitched 2 bladed prop will always be more efficient (i.e. faster for the same HP). Russell Kent wrote: An inch or two of mercury from ram air at 225 kts? I think you're dreaming. DBlumel replied: How about compared to the normal Glasair filter box arrangement? I am going straight in without a filter and did make a very nice flowed custom diffuser out of billet aluminum. Well, if you followed Kuchemann & Weber on the shape of the diffuser then you'll possibly get close to the ideal pressure recovery. But that's still only slightly less than 1" MP. I haven't any data on the existing Glasair filter box arrangement, so I cannot comment on how your intake may perform relative to the Glasair filter box. It's entirely possible that there is a 2" MP difference between them. Do you think operating that carefully built ("customized", perhaps?) IO-360 without an air filter is really a wise choice? I'd be concerned about dust and debris damaging the engine. Russell Kent |
#8
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While the 3 blade props are generally more aesthetically pleasing, a coarser
pitched 2 bladed prop will always be more efficient (i.e. faster for the same HP). I had other concerns which provoked me to go 3 blade. With a max prop diam. of 73 inches (ground clearance) I felt a 2 blade prop of that diameter would not effectively handle all the horsepower. Do you think operating that carefully built ("customized", perhaps?) IO-360 without an air filter is really a wise choice? I'd be concerned about dust and debris damaging the engine. It's not my preference, no room to put in a filter and still have room for the ram also. I intend to change oil very frequently. and I do have a S.S. screen in the intake to stop large stuff (more than 1/16th inch). I also plan to be very careful about dust conditions etc. |
#9
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"Rude, crude, and socially unacceptable - and those are his good
points," as my uncle the oilman used to say. Warren & Nancy wrote in message ... Barnyard BOb -- wrote: FWIW... Everybody that has been here any length of time accepts the fact I am an intolerant curmudgeon among other undesirable traits and qualities. Now that is the understatement of the millenium! |
#10
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Russell Kent wrote:
An inch or two of mercury from ram air at 225 kts? I think you're dreaming. Ideally speaking, dynamic pressure at 200 MPH is 104 pounds per square foot or about .722 psi. Each inch of mercury is 2.04 psi, so I'd expect just slightly less than one inch of MP *if* you had a perfect intake diffuser. Since a perfect intake diffuser is somewhat unlikely, I'd limit my expectations to about 0.5 inch MP. Richard Tasker replied: On the planet where I live it is more like each inch of mercury is 0.5 psi (.4912 to be specific). That means your stated .722 psi is in fact approximately 1.47 inches of mercury - certainly within his estimated inch or 2. Hmmm. Maybe I'm wrong. I figured that a standard day was 29.92 " Hg = 14.7 psi. Therefore 1" Hg = 2.04 psi. And there's where I went wrong. It's the other way around: 2.04 " Hg = 1 psi. So Dick's 1.47 " Hg is correct. Again, that's predicated on a perfect diffuser, which is doubtful. As a SWAG, 1" Hg (70% of ideal) is probably a reasonable goal (at 200 mph); at 225kts I'd use a linear extrapolation of 1.3" Hg. 2" Hg at 225 kts is still a dream, however. :-) Russell "always willing to learn" Kent |
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