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All very helpful and interesting stuff. Thanks a lot.
Gerry
"Jim Logajan" <JamesL@Lugoj.com> wrote in message
news:Xns97EBB92BBD37DJamesLLugojcom@216.168.3.30...
> "pTooner" <geddings@bellsouth.net> wrote:
>> Firstly, I'm new here although I have been reading for a few days. For
>> anyone with more knowledge than I, I keep considering building a small
>> 4 wing aircraft. Not stacked, but two up front and two in the rear.
>> I've read frequently of problems supposedly resulting from
>> interference of the airflow between wings, but I cannot seem to find
>> anything very specific.
>
> Theory of biplanes might provide the theoretical basis. My copy of
> "Theoretical Aerodynamics" by L. M. Milne-Thomson discusses wing
> interference between the wings of biplanes in chapter 8. (It's a Dover
> publication, so it is still in print and inexpensive.)
>
> Also, try a Google search on this set of search words (with or without
> the search word "stagger"):
> aerodynamic gap biplanes
>
>> I am fairly confident that interference
>> between the front wings (or rear) can be minimized by reasonable
>> spacing and differing dihedral.
>
> Staggering the wings tends to help reduce interference also.
>
>> I am not sure what the effect of the
>> airflow coming off the front wings will have on the rear set. I do not
>> know whether I could remove most of the problem by having one set
>> considerably higher (how much?) than the other set or if it is
>> reasonable to have them on more or less the same height.
>
> I suspect having one set high that the other would equivalent to a large
> staggering angle.
>
>> The reason
>> for the concept is trying to get a wingspan small enough to fit into a
>> normal garage and conceivably take off and land from streets and
>> highways. I visualise something in a two place plane that would fall
>> into something of the appeal category of a motorcycle or small sports
>> car. Any thoughts would be appreciated.
>
> If you are not already familiar with it, you should browse this site,
> which include planes that attempt to satisfy some of your requirements
> (the Wernicke Aircar uses low aspect ratio wings to try to meet some of
> your requirements):
> http://www.roadabletimes.com/
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Re: questions on multi-wing planforms
