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bogusbandit56
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Flies effortlessly !
Good one.

Cheers.

Thanks Luis, but not so easy as the wind picks up.
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Lgel
You have omitted the down bend of the wing of the original design (for build convenience, and strength), but you have reduced the stabilizing effect it had.

May be increasing vertical fins surface would help (or / and giving them a slight toe in).

As is, she is more aerobatic, and with some fine tuning (done without any wind), should be quite good.

Cheers.
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bogusbandit56
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You have omitted the down bend of the wing of the original design (for build convenience, and strength), but you have reduced the stabilizing effect it had.

May be increasing vertical fins surface would help (or / and giving them a slight toe in).

As is, she is more aerobatic, and with some fine tuning (done without any wind), should be quite good.

Cheers.

It does have anhedral tips, you can see at the launch.
The fins and tips are not as far back as it should be, only by and inch or so.
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Lgel
Can you post a pic of your wings, showing their shape?

Thanks and cheers.
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whatmovesyou
In the Oct AMA magazine a guy built the Blohm und Voss P 208.03 that has a 10 ft wingspan and weighs 38 lbs. The design does not have any vertical stabilizers, but he quotes"Believe me, It will not fly without them even though the horizontal stabilizers are turned down 27 degrees."

He also stated that that the german design full scale was never built. Got to always solve the yaw problems in any plane somehow.
I like to design and fly unique planes.
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bogusbandit56
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In the Oct AMA magazine a guy built the Blohm und Voss P 208.03 that has a 10 ft wingspan and weighs 38 lbs. The design does not have any vertical stabilizers, but he quotes"Believe me, It will not fly without them even though the horizontal stabilizers are turned down 27 degrees."

He also stated that that the german design full scale was never built. Got to always solve the yaw problems in any plane somehow.

I must be a genius then.( Not really) flying wings do not suffer to the same extent as conventional planes with yaw problems.
This is basically the B&V 215 wing without the fuselage.
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bogusbandit56
The weather was extremely pleasant for October and the wind had died down. I had 5 flights today with varying degree of success. I will post two of them.
The BV P.215 is a very pleasant flyer in calm conditions, but does not like to be pushed hard. It does zoom and torque steers when full power is exerted.
I need to make some more modifications to the thrust angle of the motor.
It does have an interesting way of stalling, it goes into helicopter mode and there is very little I can do to stop it flat spinning gently to the ground. This may be a result of the battery moving.
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bogusbandit56
The second video of this afternoons flights, as you can see the nights are drawing in.
I enjoyed this flight but the results were marred by my hat cam not being on straight
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Wildthing
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The weather was extremely pleasant for October and the wind had died down. I had 5 flights today with varying degree of success. I will post two of them.
The BV P.215 is a very pleasant flyer in calm conditions, but does not like to be pushed hard. It does zoom and torque steers when full power is exerted.
I need to make some more modifications to the thrust angle of the motor.
It does have an interesting way of stalling, it goes into helicopter mode and there is very little I can do to stop it flat spinning gently to the ground. This may be a result of the battery moving.

Looks like it flies pretty good. To me when you power up it drops it's nose a bit and then zooms up. Watch the fly by's , not sure how much of it is your thumbs or is it the plane or combination of both.
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bogusbandit56
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Looks like it flies pretty good. To me when you power up it drops it's nose a bit and then zooms up. Watch the fly by's , not sure how much of it is your thumbs or is it the plane or combination of both.

I am trying to keep the plane level and drop the nose as I accelerate and then it`s all over the place because it gets very sensitive to pitch at high speed.
The plane would just zoom like crazy at WOT, it actually goes vertical and then loops without me putting up elevator in.
I have done some more alterations to the motor angle, but I am also considering putting a less powerful motor in it and seeing how long a flight I can get from a 2200mha cell. It seems I can get almost 15 minutes from a greedy 2212 2200 motor so with a lower KV motor and larger prop I might be able to get ????????? minutes.
For real speed and stability this plane needs a symmetrical aerofoil as the Clarke Y type has too much lift, I`m wondering how much weight it could carry, seems like a lot more than the 17 ounces it is currently lifting.
I will also try a different prop as this 6x4.5 bullnose gives incredible acceleration but causes severe torque roll.
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bogusbandit56
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Looks like it flies pretty good. To me when you power up it drops it's nose a bit and then zooms up. Watch the fly by's , not sure how much of it is your thumbs or is it the plane or combination of both.

I may just keep this as a slow flyer and try another design the deHavilland Swallow although I did say I would have a go at the Ta 183 but I have feeling it would be similar to the BV.
I will have to start hot wire cutting symmetrical wings for these faster models.
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