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Feb 13, 2012, 12:43 PM
Registered User
SebastianG.'s Avatar
Build Log

Depron Blohm&Voss 215


Hi,

Im going to build a BV 215 with a wingspan of 1m.(tip to tip)
This build is my first scratchbuild and it will take some time to get it finished.
I still need to figure out how to angle the controlsurfaces right, this thing will use elevons only, no landing gear, maybe a bungeestart hook but im not quite sure, yet.
The electronics are still on backorder, so i have to stop my build until they arrive.
I hope that some of you , would like to help me in some aspects, like to find the right CG etc...
Nevertheless here are some pics:
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Feb 13, 2012, 01:14 PM
internet gadfly
nmasters's Avatar
subscribed

--Norm
Feb 14, 2012, 06:11 AM
Registered User
SebastianG.'s Avatar
It would be nice, if someone can post some cg calculators, i did allready some calculations but i would like to confirm my results.
Feb 14, 2012, 09:37 AM
internet gadfly
nmasters's Avatar
Go to this page and download the spreadsheet "Flying Wing Calc". If your software can not open an Excel spreadsheet you can download OpenOffice for free and it will run just about any MS Office file.

--Norm
Feb 14, 2012, 09:46 AM
Registered User
SebastianG.'s Avatar
Great! Thanks
Jun 26, 2012, 06:52 AM
Registered User
SebastianG.'s Avatar
Its been a while since the last update but i had to do some other projects.

So here is what ive got so long:

Servos installed
LED afterburner installed
EDF unit installed
Wings finished
positionslights installed
What is up next:

close fuselage
sanding
newspaper covering
maidenflight

I know it is not a perfect job but i do my very best to get this thing done.
Jun 28, 2012, 07:45 AM
Designing something...
Nice to see some progress. Definitely nice to see something unique in this forum.

Brian
Jun 28, 2012, 10:26 AM
Registered User
SebastianG.'s Avatar
Thanks!

Maybe i will upload a video of a edf/light test to night (if there is interest), i hope that everything works.
Jul 04, 2012, 01:24 PM
Registered User
SebastianG.'s Avatar
Made some progress!
Here are some pic, i still need to sand a lot and cover everything with newspaper.
I just roughly calculated the cg position, it would be nice if someone can confirm my cg.
Jul 05, 2012, 01:03 PM
You know nothing....
Stuart A's Avatar
Good looking plane,one of my favourites.Are you going to make a canopy?
Regards Stuart
Jul 05, 2012, 02:39 PM
Registered User
SebastianG.'s Avatar
There will be no clear canopy, due to a lack of space. My lipo is mounted direct in my canopy, with this position of the lipo the cg is according to my calculation perfect
Jul 05, 2012, 04:00 PM
HappyGoLucky
chochmah's Avatar
A great Project. Thanks for sharing.

I'm surprised that your projected CG is that far towards the front.http://fwcg.3dzone.dk/ gives a CG that's further back, and that program does not even take the additional winglets into account which should move the CG even more towards the tail. May I ask how you calculated your CG?

cheers
Jul 05, 2012, 04:08 PM
Registered User
SebastianG.'s Avatar
I used the flying wing calc, as it was posted here in the thread plus i moved it a bit noseheavy for the maidenflight! I have a good feeling with this position because i used a other program found on google too
Jul 06, 2012, 08:53 AM
The 6 P principle works for me
elecfryer's Avatar
Re CG, could you made a small "chuck glider" to test for CG location prior to launching your very nice build?

Michael
Jul 06, 2012, 12:29 PM
Registered User
SebastianG.'s Avatar
I will see what i can do over the weekend, maybe i can move the cg a bit back!
Thanks for all your comments


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