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Old Nov 02, 2008, 03:54 AM
Ming's Avatar
Hong Kong
Joined Jun 2002
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Windrider new BD-5J foamy jet (or pusher)

Dear All

After 18 months R&D and 22 times amendment on the drawing, the tooling is almost done. Who want to try the beta version?
Specifications:
Wingspan: 32 inch
Lenght: 28.5 inch
Material: molded PN foam
EDF: 55mm GWS type with BL motor
Servo: 3 pcs Futaba #3017 or Hyperion DS-9
Control: aileron and full movement elevator
Radio: 3 channels
Battery: 1800 to 2200 mAh 3S

Remark: this ship can fly pusher or just glider


Ming Lou
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Last edited by Ming; Nov 02, 2008 at 08:52 AM.
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Old Nov 02, 2008, 07:49 AM
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Beaver Falls ,Pa
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I will ,there are alot of guys including myself that have tried .we all love the bd5j. I gave up on my own design .but Ill try yours .do you have pics of the real thing.crtaylor
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Last edited by crtaylor; Aug 14, 2009 at 10:11 AM.
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Old Nov 02, 2008, 08:54 AM
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United States, TX, Fort Worth
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How much for the Beta shots shipped to the US? I am interested an want to sign up for one, now!
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Old Nov 02, 2008, 09:05 AM
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Edmonds Wa. (Seattle)
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Count me in! I wanna play.

Scott
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Old Nov 02, 2008, 09:19 AM
Ming's Avatar
Hong Kong
Joined Jun 2002
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Just add the per-order of BD-5J on my website:
http://www.windrider.com.hk/product.asp?id=164
Total US$100 to ship worldwide by air parcel.
Kit included one GWS 55 EDF(w/o the motor).
Limited for 30 pcs only.

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Old Nov 02, 2008, 10:03 AM
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Ming, do you have any video?
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Last edited by crtaylor; Nov 02, 2008 at 10:28 AM.
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Old Nov 02, 2008, 05:32 PM
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Bd-5j

Hello Ming! Nice to see your BD-5J! is it possible to mount a retract?
Greatings from Switzerland!
Bruno
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Old Nov 02, 2008, 06:05 PM
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I think it can be add.

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Old Nov 02, 2008, 06:34 PM
Electric Coolhunter
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I just ordered one....when are they going to ship?
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Old Nov 02, 2008, 06:40 PM
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1st week of dec 08
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Old Nov 02, 2008, 06:45 PM
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Thomas B,what kind of power are ya thinking about for this
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Old Nov 02, 2008, 07:16 PM
Electric Coolhunter
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United States, TX, Fort Worth
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Have not yet thought much...might do a LSJS...or a Don's wicked motor.

Will probably ditch the EDF-55 and use a better fan. Might do the GWS housing and turn down a 5 blade Alfa fan to fit, though....
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Old Nov 03, 2008, 09:22 AM
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Ming, can you tell me if the thrust line of the fan ducting is parallel to the fuselage center line, or does it have the proper upthrust at the back (thrust line running lower as it gets to the wing and center fuse) to reduce the nose down pitch moment of the model when under power at low air speed?

Also, I was looking at the picturte of your modela nd noticed the shape of the Horizontal tail.

There is a widely distributed three view that has a delta shaped horizontal tail like your model, but it is actually incorrect. The correct shape is in the attached three view.

I guess it is too late to correct the shape of the horizontal tail in the tooling?

If so, I don't mind all that much, as it will be easy enough to build a correct horizontal tail. It would be nice if it was closer to scale right out of the box, though.

The larger tail area it provides would certainly help the handling of a small model like this, as well.
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Last edited by Thomas B; Nov 03, 2008 at 09:38 AM.
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Old Nov 03, 2008, 01:13 PM
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I agree stab looks funny.But like you said can always make one ,its the fuse thats hard to do .Ill still get one .crtaylor
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Old Nov 03, 2008, 01:24 PM
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Hong Kong
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The thrust line and fan is parallel on my design.
It could be OK because use full movement elevator.
Plus the level between the wing and duct is closer on this plane compare to the real one.

See another drawing about the Horizontal fin.

All comment is welcome, I willing to amend the tooling if need.

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