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Thomas Boyle
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NY
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We Can't Afford Avgas War
from Thomas Boyle
wrote 2 years 48 weeks ago
Greg,
My impression is that the closed-door deals are aimed the other way - trying to keep low-compression pilots from pressing for an E0 premium or 94UL solution and undermining the market for 100LL/100UL.
Avgas is $2.50/gal more expensive than premium mogas. For a 180 hp operator, at 10gph / 2,000 hours, that's $50,000! Even if premium mogas on airport cost $1.25 more than on the street, the difference would still pay for overhauls. It's amazing that low-compression pilots, or rental outfits, haven't gotten more vocal before now.
Hence the concern about having everyone "stick together."
I have no idea how much of the $2.50/gal difference between premium mogas and on-airport avgas is due to mogas/avgas, and how much is due to on-street/on-airport. If it's mostly the latter, there's not much to be saved from switching to a lower-octane fuel. If mostly the former, there may not be much future in betting on a "one fuel" philosophy.
Is the FAA Ready to Pull the Plug on LSA Certification Standards?
from Thomas Boyle
wrote 2 years 46 weeks ago
Piper doesn't list a stall speed for the PiperSport. Czech Aircraft Works, in its POH, lists the SportCruiser stall speed as 38 knots CAS (32 knots IAS).
I have flown a handful of LSAs. I found all of them a lot of fun to fly. One didn't appear to have enough pitch stability to hold a trimmed speed. Aside from that one, all of them were an absolute pleasure to fly, when compared with the high- and low-wing trainers I learned in. One, it's true, was a bit stiff in roll compared to pitch, and handled more like a glider - or like a DA-40.
The aircraft I learned in - the ones we all learned in - had poor roll authority and sticky yokes that often had high pitch breakout forces. Their performance numbers were wildly optimistic - the worst I've come across was a certificated aircraft whose published best rate of climb was too high by over 60%.
We all agree that the LSAs seem too expensive - and the Skyhawks do too. That said, you can buy a factory-built airplane-type LSA for under $60k (just), and 2-seat trikes from a reputable company for $36k. Alternatively, you can build a CGS Hawk, which is comparable to an early Cub, from a fast-build kit for about $35k (including $11k for the engine). What we're seeing, though, is that there's more demand for the high-end models. That, and the slightly flimsy appearance of almost all the LSAs (the spars may be strong, but the metal skins are thin) suggest it would make sense to go to higher weight limits and remove the speed limit (keep the stall speed requirement, since that actually affects safety - although it could arguably be with flaps).
Training: Things That Go Bump
from Thomas Boyle
wrote 2 years 48 weeks ago
I have to object to your characterization of the midair involving the business jet and the sailplane.
You say that the jet captain "barely had time to avoid the glider when it collided with the nose of the Hawker." This creates the subjective impression in the reader that the Hawker was an innocent victim, as it were, that the glider ran into. You portray gliders as an in-flight hazard to jets. But the jet was moving at hundreds of knots, and the glider was thermaling at perhaps 45 knots - essentially stationary. Your description is like saying that "the pedestrian ran into the car." A more accurate description of the event would be that the jet captain ran over the glider, and did so (by the way) having failed to give way to the glider as required by the FARs. The jet was an in-flight hazard to the glider (which, by the way, was demolished in the collision - fortunately the pilot was wearing a parachute and the jet did not kill him).
If gliders are made to sound like an in-flight hazard, the reader may conclude that perhaps they should be eliminated or more tightly regulated for the safety of jets everywhere. But from a glider's perspective, fast-moving jets (with pilots who aren't looking out the window) are a (very worrying) in-flight hazard that perhaps should be eliminated or more tightly regulated for the safety of gliders everywhere. Isn't it the responsibility of those who charge around the sky at high speed, to make sure they don't run down the little people? (I mean, that's what FAA is demanding of mere UAVs.) Remember, technically the glider has right of way; it's the jet's responsibility to see and avoid it - and the jets are refusing/failing to use appropriate technology to do so.
Of course, the glider perspective is a minority one, and because of that it may at first sound strange - as a pedestrian's might in a world with few pedestrians. But you see how a change in emphasis leads to a change in the implied solution. Thus, I object to your implication that gliders are a hazard, a problem, a thing to be eliminated. Fast-moving jets are a problem, and their collision avoidance technology is inadequate, given the speed they're flying at.
And, yes, gliders have been trying for years to get a) a national transponder code and b) transponders with low power requirements - which is partly a problem because minimum output power requirements are designed for power aircraft, and are designed to ensure that the signal reaches ATC (and not just TCAS in the area). But the FAA has a million more important things to do than to address transponders in sailplanes. We know. And we worry that we'll be the next one to be run over by a jet. If you think it's scary to be in a jet, in a sky that may have gliders in it, then think about how it is to be in a glider, in a sky that may have jets in it.
Piper's LSA Entry Takes First Bow
from Thomas Boyle
wrote 3 years 11 weeks ago
In response to the dwightabb, I saw that Piper is, in fact, planning to modify the aircraft's handling and I live in dread of finding that they have given it marshmallow handling, to match the Cessnas and older Pipers in the fleet.
I found nothing "unconventional" about this aircraft, except perhaps that it handles like a modern design, rather like a DA-20 or DA-40 or (for that matter) a Bonanza, and not like the "is-this-thing-connected?" handling of the older trainers. I consider this a very good thing.
Trainers do not have to have vague handling, that's just how it's always been - but that doesn't make it a good idea. The SportCruiser I flew was not twitchy in pitch - but it was rather heavy in roll. I certainly didn't think it was a "jitterbug." The airplane is light in pitch by comparison to the truck-like handling of older trainers, but any modern training sailplane is lighter in pitch, and people of all ages learn to fly those all the time.
All the LSAs need a good deal of rudder on initial application of power, and/or a more gradual application of power than many light aircraft pilots are accustomed to using. It's a result of their relatively high power to weight ratio and lightly-loaded nosewheels. The SportCruiser (soon to be Piper Sport) is actually much better in this regard than the other LSAs I've flown. If the pilot brings in the power over 3 seconds or so, this is not an issue at all. As a training device, it certainly communicates "P factor" better than a lecture; and it prepares the student for higher-performance aircraft down the road.
I agree that visibility over the nose of the SportCruiser is poor; many of the other LSAs are much better in this regard. However, I didn't find it necessary to fly the pattern with flaps down.
I would make the roll lighter, and if the pitch were a little heavier that would be fine, but as I say, my big fear for this airplane is that it will be "trainer-ized" into yet another flying truck. There are too many of those already; I'm hoping we will be able to teach a new generation to fly airplanes with decent handling.
We Can't Afford Avgas War
from Thomas Boyle
wrote 2 years 48 weeks ago
Many/most fliers could use an "avgas" that is essentially ordinary, ethanol-free gasoline - including anyone using a production Continental engine, it seems. That's got to be a lot cheaper than any high-octane solution, because it's a lot closer to what the oil companies already produce. Pilots have all paid through the nose for high-priced specialty 100LL avgas for years, because the market wasn't big enough for 2 piston fuels, so 100LL was the only thing available on the airport (it got there first). Most of them not only didn't need 100 octane, they would have preferred unleaded - a whole generation learned in trainers that had to be leaned aggressively on the ground to avoid lead-fouled plugs, and now all the Rotax operators (for example) find themselves with modern motors designed for lead-free fuel - but 100LL is the only thing available at the airport.
And now that 100LL may finally be given the boot, there's a debate about whether all the little guys should stand in solidarity to support a new specialty fuel they don't need, and commit to decades more of paying specialty-fuel prices, so that a relatively few rich folk with big Lycomings don't have to modify their engines a little?
Is it just me, or does this seem like a no-brainer?
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