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tc1917(at)bellsouth.net
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 Posted: Tue Oct 26, 2010 2:09 am Post subject: thrust line |
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I guess when I say it, it is BS but when someone else says it, particularly
someone who DOESNT OWN OR FLY A SLINGSHOT, it is God's Truth. Do as you
want with your little slingshots, I dont care. I offered the cure. One
thing is a factory certain, the motor mounts on the slingshot were placed
wrong. They were set as the ones on the other planes and not changed even
though the factory KNOWS they are wrong. I have talked with them
extensively and being as they dont offer the model any more, it is a mute
subject. The wings on other models are set approx. 12 degrees and the
slingshot is set at 9 degrees. do the math. do as you would like. I like
easy cruise and economy with speed. Enough. Ted Cowan, slingshot, 912UL,
zoom zoom. p.s. my cruise is 85 mph and burn 3 gals of gas per hour. can
carry a 175 pounder in the back seat and I dont have to tug on the pole to
do it. finished.
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Wed Oct 27, 2010 5:00 am Post subject: Re: thrust line |
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Ted,
I don't know why you are taking offense. When I first brought up the subject, you graciously responded by saying that you added 7/8" worth of washers. And I much appreciate that information which confirmed my suspicion that my engine was pointing up way too high.
I then asked you the same question in terms of the ANGLE between the thrust line and bottom of the wing, but you didn't respond to that. Not that you have any obligation to, but you didn't, so I asked for this ANGLE of others on the Kolb list, in particular others with Jabiru power. And guess what, I still don't have that answer. I have seen photos showing what it looks like and ALL of them have the thrust line intersecting a forward extension of the bottom of the wing plane. This further confirms that mounting the engine flat on the standard motor mount on the Slingshot is not the best solution but I still don't know what is the preferred or most common or correct intersection angle for a Slingshot or any Kolb for that matter.
Again, nobody is obligated to answer this question and perhaps the reason is that nobody has that information, except Jack Hart for his Firefly.
Again, Ted. I am sorry if you took offense, none was intended. I am sure your 7/8" washers works well and I will be aiming for that with the beveled shims. When I go to the hangar next I'll take the measurements and come up with the answer I'm looking for using the 7/8" and a little trigonometry. And I will post that angle for others who may be interested. I suppose I should have done that to begin with after you gave me the 7/8" figure (which I completely trust is the right answer) and not bothered the list with it.
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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