aluminum renesis rotors?
#54
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Originally posted by j9fd3s
yes and another plus for planes is that if you loose a rotor, its still running on the other one(s), unlike say throwing a rod in a piston engine
mike
yes and another plus for planes is that if you loose a rotor, its still running on the other one(s), unlike say throwing a rod in a piston engine
mike
Since a two-rotor engine operating on only one rotor only produces about 35% power, throttling back to decrease the vibes will leave you with not enough power to maintain altitude. This will increase your glide distance, but if there's no landing strip within gliding distance you'll be doing an off-airport landing.
This actually happened about 8 weeks ago to a guy named Chuck Dunlap. He was on his way to Arlington Wa. in his 13B-powered RV6 kitplane. While over the grand canyon a dowel pin in the Pinneapple racing-supplied secondary intake actuator worked loose and was ingested by the engine. This destroyed his rotor and housing.
He was able to glide to a hwy and make an emergency landing, but a truck got in his way and in avoiding a collision his landing was rough enough to slightly damage one wingtip.
It's true that if these engines overheat they won't seize, which is good in aircraft. But the engine will need to be replaced after landing.
The only other failure modes are fuel starvation, electrical failure, and apex seal failure. As long as you don't overboost them and as long as you run premix instead of that crud from the oil pan to lube the apex seals (and don't ingest any foriegn object debris) the apex seals will hold up just fine.
#55
it WILL run
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Originally posted by voodooracing
the shorter seal height could also be used for sprung weight reduction...?
the shorter seal height could also be used for sprung weight reduction...?
thats what they did since the 8 has a higher redline
#56
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Originally posted by Aviator 902S
as long as you run premix instead of that crud from the oil pan to lube the apex seals (and don't ingest any foriegn object debris) the apex seals will hold up just fine.
as long as you run premix instead of that crud from the oil pan to lube the apex seals (and don't ingest any foriegn object debris) the apex seals will hold up just fine.
Some of the second gen guys don't agree.
#58
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Originally posted by The_7
i really wanna see the testings of mazdatrix and know if they will work in the other 13Bs
i really wanna see the testings of mazdatrix and know if they will work in the other 13Bs
they will if you machine the apex seal slots
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Originally posted by 88IntegraLS
Ha ha, "crud from the oil pan", perfect way to say it. I knew the aviation rotary engine builders disabled the crankcase oil injection! Crud is right. When that stuff burns, it leaves behind all the dirt and acid held in suspension, which cakes the rotor with soot. "Hot spots", anyone?
Some of the second gen guys don't agree.
Ha ha, "crud from the oil pan", perfect way to say it. I knew the aviation rotary engine builders disabled the crankcase oil injection! Crud is right. When that stuff burns, it leaves behind all the dirt and acid held in suspension, which cakes the rotor with soot. "Hot spots", anyone?
Some of the second gen guys don't agree.
mike
#63
As long as there is enough casting(material) around the apex groove left after milling to accomodate the regular height seals they should work fine in earlier motors. Can't wait to see the results from Dave at Mazdatrix.
#65
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Alum. rotor
Originally posted by 88IntegraLS
So what exactly is the reason alloy rotors would melt? Forged alloy pistons are regularly used in Honda engines. (ha ha, I am a honda owner too. ) Isn't the reason rotary exhaust gas temps are higher than piston temps is because rotaries don't burn the air/fuel as long and expel it out the exhaust earlier than a piston engine would? Piston engines run leaner, too, meaning higher actual combustion temps.
So what exactly is the reason alloy rotors would melt? Forged alloy pistons are regularly used in Honda engines. (ha ha, I am a honda owner too. ) Isn't the reason rotary exhaust gas temps are higher than piston temps is because rotaries don't burn the air/fuel as long and expel it out the exhaust earlier than a piston engine would? Piston engines run leaner, too, meaning higher actual combustion temps.
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Originally posted by mazdized
Oh I forgot to mention the teflon piston that has been under developement for years now. May be rotary can skip alum. and go straight to teflon in the future.
Oh I forgot to mention the teflon piston that has been under developement for years now. May be rotary can skip alum. and go straight to teflon in the future.
The ones that everyone had bored out to build monster vegas w/ stock motors (not talking about BBC Vegas) because the teflon had a tendency to chip off and trash motors... At least that's what memory tells me.
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Originally posted by peejay
They also had 3-piece ceramic apex seals and the engines were torn down after every race...
They also had 3-piece ceramic apex seals and the engines were torn down after every race...
#71
spoon!
Originally posted by j9fd3s
while its far from conclusive the factory used a metering pump on the 787's
mike
while its far from conclusive the factory used a metering pump on the 787's
mike
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Originally posted by Kenku
The point could be made that more than likely Mazda had whichever oil company was sponsoring them brew up a special blend of oil specificially for that motor which would eliminate any problems of injecting motor oil into the engine...
The point could be made that more than likely Mazda had whichever oil company was sponsoring them brew up a special blend of oil specificially for that motor which would eliminate any problems of injecting motor oil into the engine...
#73
spoon!
Originally posted by j9fd3s
if there are any in the first place
if there are any in the first place