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"GTH" <Gilles.Thesee@ac-grenoble.fr> wrote in message
news:44a2c122$0$19563$636a55ce@news.free.fr...
> Gerry and all,
>
> Been following this most interesting conversation on aircraft design.
> I'd just point out some issues that one is to consider when
> endeavouring to devise his own desin.
>
>> Then where WOULD be the right starting place?
>>
>
> This is the most important point. It is unwise to start thinking of
> SOLUTIONS ( number of wings, biplane, delta, tandem wings...) before
> posing the PROBLEM, and establishing what the aircraft will be required to
> do.
>
> I understand that this particular airplane should be small, light, and
> able to take off from an unprepared stretch of private road. And it should
> be storable in a garage.
>
> There are several designs (some of them out of the US) that fulfill these
> requirements, without resorting to exotic or complicated technical
> solutions. And yet have outstanding handling qualities, payload and
> performance on a reasonable power.
>
> The MCR 01 two seater is one of them :
> http://www.avnet.co.uk/lts/pages/mcr.htm
>
Thanks for your response, Gilles. A bit of clarification, perhaps. This is
not really a design to fullfill a mission. It's more of a "why not"
exercise. The very short wingspan is the only real design criteria, and it
is just my idea rather than a definite need anyone has. The MCR 01 is a
very interesting design, but with a wingspan of over 20 feet it doesn't fit
my plan. Consider that if you made it a 10 foot span biplane it would
perhaps fit the bill?? I could restate it this way, if you divided the 20
foot wingspan of the MCR 01 into two wings either tandem or stacked would it
provide similar performance? How about 4 10 foot wings with one foot chord?
I do not really know the answer, I am just brainstorming to see if anyone else
knows the answer.
Gerry
>>>
>>> Re: the dimensions of your wings...
>>>
>>> First - learn about Reynolds number.
>> Okay
>>
>>> Very few of the published airfoils work well below about 3 meg RN.
>>>
>>> What does that mean in regard to your choices?
>>>
>>> Well, the two-foot chord wing is going to have to move pretty fast to
>>> make
>>> 3 meg RN.
>
> The MCR 01 has a two foot chord wing, and the four seater we built has a 3
> foot chord.
>
>
> Concerning the Delta Dyke, one of my buddy owns one, and it is certainly
> not an answer to the original poster's requirements. On the contrary, it
> is a dog in flight, and very tricky. Deltas are definitely not a corrrect
> solution to any slow airplane.
>
> Regards,
> Gilles Thesee
> Grenoble, France
> http://contrails.free.fr
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Re: questions on multi-wing planforms
