Designs or Plans for Small aircraft which can take a fair amount of weight
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Designs or Plans for Small aircraft which can take a fair amount of weight
Hello,
I am generally interested in plans or a design or an aircraft that is small, lets say under 1000mm wingspan but one that can take a bit of extra weight. Preferably powered by single electro engine.
Thanks
I am generally interested in plans or a design or an aircraft that is small, lets say under 1000mm wingspan but one that can take a bit of extra weight. Preferably powered by single electro engine.
Thanks
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
extra weight? a payload aircraft or something built heavy like a tank? If a payload aircraft, then maybe you can look a plane with undercambered wings or even a canard! Eg.. burt rutan's voyager is a very good example of load distribution over two main lifting wings.
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
Good idea, extra weight as in maybe more batteries, camera stuff. General things i can play around with. a Flying wing might be ideal?
Ngb
Ngb
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
yes the flying wing sound much like the idea solution. What you need to consider now is platform stabilty & controlability. In this regard a flying wing's narrow c.g range as compared to a conventional plane's long tail moment arm makes controling the wing harder. However this can be solved with a gyro setup in the pitch axis.
Any r/c platform designed to take "expensive" camera loads airborn should have a stable flying platform for it to mount in. I recall there was a a college competion for a high lift rc plane. And i think a U2 looking plane placed highly. In general if you are using electric power, you will get much better results with a high aspect wing ration (glider) be it normal planform, flying wing or canard layout as these are much more suited to lower power engines (electric)
Any r/c platform designed to take "expensive" camera loads airborn should have a stable flying platform for it to mount in. I recall there was a a college competion for a high lift rc plane. And i think a U2 looking plane placed highly. In general if you are using electric power, you will get much better results with a high aspect wing ration (glider) be it normal planform, flying wing or canard layout as these are much more suited to lower power engines (electric)
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
hmm....
Im thinking glider type design with electric ducted fan, with brushless an lithium setup for lightweight, it would give me more flexibility and options than a flying wing.
Ngb
Im thinking glider type design with electric ducted fan, with brushless an lithium setup for lightweight, it would give me more flexibility and options than a flying wing.
Ngb
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
Ducted fans don't do well at higher wing loadings. They are at their best in smaller airframes where speed is the desire and not so much sustained climb angles such as most powered glider styles are working with.
You're working with highly contradictory requirements. Small models don't do well with extra weight since the scaling effect says that the smaller the model the less efficient it is. The airfoil choice can help a little but it's only a small factor. To fly well you need to figure on a light model. Carry a payload by all means but be sure that the final wing loading of the model WITH payload is within the accepted range of wing loadings for that wing area of model. And then you want to add a ducted fan to all this.
Under a one meter span the models typically have around 250 to 270 sq inches of wing area. The generally accepted max weight for such a size of model is around the 23 to 25 oz range. But at that weight the smaller wing is not going to be happy and will let you know it with some nasty stalls on landing approaches, higher landing speeds and generally doggy handling in maneuvers. Even the larger wing is not going to make for a fun to fly model at those weights. Keeping the weight down to under 20 for these wing sizes will result in models that are much more fun to fly and that will be much more tolerant to mistakes during landings and takeoffs.
I know that some scale and semi scale ducted fan jet style models are flying at these wing sizes and at around the max weight that I suggested but generally the pilots fly these models at high speeds for the entire flight because they know that if they slow them down they are going to get doggy really quick. In effect they are good enough to fly to show off the better traits of the model and avoid the bad traits. But the best performance envelope for such designs is narrow.
You're working with highly contradictory requirements. Small models don't do well with extra weight since the scaling effect says that the smaller the model the less efficient it is. The airfoil choice can help a little but it's only a small factor. To fly well you need to figure on a light model. Carry a payload by all means but be sure that the final wing loading of the model WITH payload is within the accepted range of wing loadings for that wing area of model. And then you want to add a ducted fan to all this.
Under a one meter span the models typically have around 250 to 270 sq inches of wing area. The generally accepted max weight for such a size of model is around the 23 to 25 oz range. But at that weight the smaller wing is not going to be happy and will let you know it with some nasty stalls on landing approaches, higher landing speeds and generally doggy handling in maneuvers. Even the larger wing is not going to make for a fun to fly model at those weights. Keeping the weight down to under 20 for these wing sizes will result in models that are much more fun to fly and that will be much more tolerant to mistakes during landings and takeoffs.
I know that some scale and semi scale ducted fan jet style models are flying at these wing sizes and at around the max weight that I suggested but generally the pilots fly these models at high speeds for the entire flight because they know that if they slow them down they are going to get doggy really quick. In effect they are good enough to fly to show off the better traits of the model and avoid the bad traits. But the best performance envelope for such designs is narrow.
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RE: Designs or Plans for Small aircraft which can take a fair amount of weight
Makes sense, thank you for the enlightment about that!
Im looking for lightweight but as i said i need some power to get it around.
Preferably an engine that would not be mounted in the nose.
Any one have plans for a U-2 I have always wanted one?
Ngb
Im looking for lightweight but as i said i need some power to get it around.
Preferably an engine that would not be mounted in the nose.
Any one have plans for a U-2 I have always wanted one?
Ngb