Hi Martin,
Long time no hear. Firstly, I do not think that it is necessary, The
Q1 is an excellent solution for it's intended mission.
The first port of call would be to look at the Q2 and Q-200 solutions
for the elevator and ailerons. The next task would be to have a good
look at the rudder fin combination. If you had the tools, a flutter
analysis is the best way forward - but it is easier, surely, just to
fly within the envelope. If I wanted a faster aircraft, I would have
built one (oops, come to think about it, I did
)
All the above said, that is not to say it cannot be done. I would
rather say that it is unlikely that it can be done simply. It is
simply foolish to assume that everything will be fine because.....
Burt always overdesigns everything right? Guess how much of the
margin was consumed with the VE mainspar issues?
Common sense check : when Burt wanted a faster solution it is
significant that he did not just overpower a Q1 and end up with the
AMSOIL racer...Wonder why?
Regards
John
--- In
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, 'Martin Burns' <martin.burns@...>
wrote:
>
> John,
>
> The Q1 does not have mass balanced control surfaces. Is it worth doing,
> and if so, how would you go about it?
>
> Martin Burns
>
> G-BKSE Q1 Scotland
> (still trying to fit that Kohler engine)
>
> ________________________________
>
> From:
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[mailto:
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]
> On Behalf Of JohntenHave
> Sent: 06 November 2006 08:46
> To:
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> Subject: [Q1_Aircraft] Re: VNE
>
>
>
> Sorry Guys,
>
> this is not completely correct.
>
> VNE is determined by the designer and it is the design speed above
> which structural damage or failure can occur if the wrong combination
> of events coincides.E.g. Such things include gust loadings, flutter,
> wing or surface divergence.
>
> THE FACT THAT OTHERS CHOOSE TO UNDERTAKE RISKS THAT THEY EITHER DO NOT
> UNDERSTAND OR DELIBERATELY CHOOSE TO IGNORE WITHOUT ANALYSIS IS NOT
> JUSTIFICATION FOR REPEATING SUCH STUPIDITY. The fact that they got
> away with it once does not guarentee you will get away with it.
>
> Is the quickie overbuilt? Where is the weakest point? What is the
> failure mode? After adding extra weight, how much margin is left?
>
> If you cannot answer those questions before you make the change, do
> not do it.
>
> I agree with Ryan on one point, mass balancing the control surfaces
> will reduce the risk of one of the failure modes due to overspeeding.
>
> John
>
> --- In
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> <mailto:Q1_Aircraft%40yahoogroups.com> , 'Tri-Q1'
wrote:
> >
> > Jonathan,
> >
> > The VNE is a published number set by the designer. This is a speed
> > that a design has been tested to, more speed than that is for the
> > test pilot (YOU) as to what is safe under the conditions it was
> > tested to. A builder that modifies an aircraft or set of plans can
> > change/set the numbers because they are the designer now. The
> > Quickie being a Rutan design is over built , as are all of his, for
> > the mission at hand, why not make it 1 1/2 times as strong and safe
> > as advertised, it protects your bacon and wallet at the same time.
> >
> > I have not compared a set of Q200 plans with the original Quickie
> > plans to see where the extra structural strength is. The simple
> > answer is that all of the moveable surfaces on the Q200 are balanced
> > dynamically. I would bet that Leon knows the answer.
> >
> > Ryan
> >
> > --- In
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> <mailto:Q1_Aircraft%40yahoogroups.com> , 'jpkuehne' wrote:
> > >
> > > The Vne on the Quickie is 150 mph, I believe, correct? The Q200
> > > must be substantially higher, as I have seen some of them flying
> > > close to 200 mph. What makes the difference? Is there a
> > > substantial change in the way the canard or main wing is
> > > constructed? More layers? Better materials?
> > Bigger/thicker/longer
> > > spar?
> > >
> > > Of course more Hp will be needed, and that means more fuel burn,
> > but
> > > SURELY the frontal surface area of a Q1 is smaller than a Q200...
> > > How much more would it take? (Any engineers out there?)
> > >
> > > So what would it take to build a rocket out of one of these?
> > >
> > > (Not saying I'm GOING to, but just thinking out loud...)
> > >
> > > And BTW - has anyone constructed a larger fuel tank, or added a
> > > secondary tank? How about baggage or fuel pods? I would think a
> > > secondary tank and a hand transfer pump would be a relatively easy
> > > add-on...
> > >
> > > Thanks all!
> > >
> > > Jonathan
> > >
> >
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>