Mini Imp drivetrain is mostly about torsional vibration. Search this forum for torsional vibration and you get some hits.Can you speak specifically of what the drivetrain issues was all about. How do you suppose electric fixes this?
I would lean towards the assumption that the airplane was a single point design and was inherently difficult to fly. Which is exactly why a more experienced pilot would have been appropriate. The NTSB report indicates Mr Giertz's total time was <300 hours, which isn't a very good basis to start from in conducting the initial flight in something as radical as the Vmax Probe.Well, I'd never known about this plane before this thread. So for anyone else in the same boat:
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Lar's web site (I think)http://www.webcamsue.nl/vmax.html
The NTSB report noted directional stability problems (yaw) during take off, so that points toward low speed control issues under full power. That would seem to lead to extreme problems in a low speed low power condition.
It was fast, but unflyable. Probably a good case for wind tunnel testing before actual flight.
Were I to have the time and patience, I think such a design could be improved upon in some of the deficient areas. That will include a crash worthy frame and flight controls with more surface area. Also, an adequate baggage area for oxygen tank and the occasional weekend luggage for one pilot/occupant. There might be a need for a bigger engine if the level of performance previously advertised is the goal. 300 mph is very impressive.300mph @ 100 hp.
These are design features for the stated goals. Lars was not designing a sport plane. Try getting too slow in the Nemesis NXT on short final......I wouldn't call the items being discussed here as design flaws. I did not know the designer / pilot, but machines designed by racers for all-out speed, especially in a light weight category, will always be short on safety features and, likely, docile handling. There is a huge difference between a sport aircraft and a single point (in this case, maximum speed) design.
Sure. And one of those differences is that bleeding-edge, "point" designs, trying to push some performance parameter, are quite a bit more likely to crash in the first place. When such aircraft are "short on safety features", as you say, the result is predictably much as we have here.I wouldn't call the items being discussed here as design flaws. ... but machines designed by racers for all-out speed, especially in a light weight category, will always be short on safety features and, likely, docile handling. There is a huge difference between a sport aircraft and a single point (in this case, maximum speed) design....
I see it that way as well, but I fully respect that some might not. Now more than ever before, gambling your life in the pursuit of excellence is pretty much the only shot many folks have at rising above mediocrity--or worse. And not everybody has the resources to cover their bets for every possible outcome....I don't see how it's somehow more acceptable to have a dead pilot just because he was trying to "push the limits". Pretty sure his friends and family probably would think otherwise...
Do I really need to point out the obvious? Sure, that extra inch may have cost him the record - may have. But the lack of it certainly cost him the record, since he's now dead from a crash that that extra inch might have helped him survive, and the record completely lost to him, forever.That inch could also be the difference of breaking the record or not. No need to build the plane if it's not going to break the record. It gets to the point with performance, you can't keep improving without giving something up. The kind of dedication to break records is high because there is only one purpose. If beating the record is relatively easy, the bar is on the low side. Not saying the man ,if he knew,would have given up his life to do this, but he wanted to push to that edge.
After WW2 auto racing had lots of fatalities, and they were tolerated because they had just come off the war where there was a lot more death. Racing was not as dangerous as war. As the time from the war got larger, drivers or spectators getting killed were less and less tolerated. 60s and 70s was when safety had to be considered as much as speed. I think we are more shocked today when someone would really lay that type of dedication down for something actually unimportant.
Do I really need to point out the obvious? Sure, that extra inch may have cost him the record - may have. But the lack of it certainly cost him the record, since he's now dead from a crash that that extra inch might have helped him survive, and the record completely lost to him, forever.
It's all well and good to say, "maybe", but I'm more of the opinion that "maybe" is one hell of an epitaph, and not in the good way.