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Old Aug 18, 2009, 10:39 PM
a.k.a. Matt Nelson
MattN's Avatar
North Tustin, CA
Joined Oct 2008
1,815 Posts
Third time's a charm!

Well, I just finished a re-fit of my B900. The el-cheapo Cirrus servos gave out on me, so I did a little work on it:
  • Stripped out all the guts of the glider
  • Removed the tailgroup
  • Scraped the boom. Looks cool
  • Installed a couple D47s. These are smaller than I had thought - I believe they might be the shortest servos you can get (much shorter than GWS Pico's). The servos now stand upright in the pod!
  • Left room in the nose for one of ASK's NiMh battery packs. No more wimpy flight times.
  • While it was naked, I decided to try my hand at making some new tailfeathers - I copied the planform of the original surfaces, cut them out of generic balsa, rounded the LE's, tapered the TE's, and did a simple layup w/ 0.5 oz FG in an aqua-vac bag. I added a 1.4 oz FG live hinge in the layup, and am using that for the hinges now. I also added some 1k CF tow for stiffness. Came out pretty good for a first try.
  • Made the H-Stab removable - held in place by a nylon screw and two CF pins to keep it square to the boom.
  • Went all pull-spring
  • Routed the strings through the boom and out a little hole near the tail. Reinforced the boom on either side of the exit hole with a couple wraps of Kevlar thread.

Compared to my first build, this is now much cleaner. Pictures of the pod layout and the tail are attached.

AUW is 5.05 oz (143 g) with preliminary CG placement. Looking back at the build log, this is actually lighter than my first build, and I've got a bigger battery and no lead in the nose!

I'll re-maiden next weekend

-matt
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Last edited by MattN; Aug 19, 2009 at 10:31 PM.
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Old Aug 21, 2009, 11:33 PM
Registered User
Shanghai China
Joined Dec 2007
14 Posts
Canopy ring of B-900

Some buyer discussed the different way of fixed canopy for B-900.
I used the sealed plastic bag for it.
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Old Aug 22, 2009, 02:11 AM
Registered User
Hamilton New Zealand
Joined Apr 2005
81 Posts
new binary 900

HI Harry

Could you post some photo's and my be a u tube video of the new version of the binary 900? It looks good on the website, but i would like a closer look before i commit to buying one.

regards
Chris
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Old Aug 31, 2009, 05:00 AM
flying is not a dream
lebenj's Avatar
Spain, CT, Cardedeu
Joined Jan 2008
995 Posts
Peak Hobby has a sell now the binary 900 V2.
aleron + elevador.

how was flying the first version?

looks very good construction.
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Old Aug 31, 2009, 10:54 AM
a.k.a. Matt Nelson
MattN's Avatar
North Tustin, CA
Joined Oct 2008
1,815 Posts
Quote:
Originally Posted by lebenj
Peak Hobby has a sell now the binary 900 V2.
aleron + elevador.

how was flying the first version?

looks very good construction.
The plane is a bit on the heavy side for thermal flying (mine is 5oz), but it's build strongly, and seems to be taking strong launches easily. I did have to reinforce the wingtip at the launch peg with some thin CF laminate - the wingtips are very thin, and it was forming a crease.

That said, I was out with it this weekend in miserable conditions (hot as blazes, no breeze, barely a thermal to be found), and it seemed to be staying up in the air nicely - almost as good as my BIII.

I don't have any experience with the other mini DLGs out there, so I can't compare. If you could figure out how to build this one at more like 4.5 oz, I'm sure it would float with the best of them. It might be possible if the tailgroup was built a little lighter - I didn't bother to order any contest grade balsa; just grabbed the lightest sheet I could find at the local hobby shop. And it was my first attempt at vacuum bagging.

I like the plane a lot - I actually have a spare kit sitting on the shelf for when this one eventually dies.
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Old Sep 03, 2009, 04:20 PM
flying is not a dream
lebenj's Avatar
Spain, CT, Cardedeu
Joined Jan 2008
995 Posts
i tried to contact peak hobby, but they do no respond me....

someone can give me an Email from them?
the only one i found was webmaster@peak-hobby.com

i was looking for 1meter DLG, and definitly i would like to buy this one.

Thanks
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Old Sep 03, 2009, 07:58 PM
Registered User
Joined Dec 2006
54 Posts
Hello Benjamin
I send two mails to you .May be there is problem in the mail server. I forward the mail again from this mail box and Peakha@gmail.com.
Here is the comment for your enquiry below


what is the weight of the plane out of the box without any radio eqiupment?
I scaled one set Binary-900 V2.0kit for all parts in the box.total weight is 103g.
These parts include in pushrod and aileron linkage,horn etc.,

- is it possible to have an english manual of the binary 900 to make more idea about it?
We have the CD-Version building instruction in English with the kit.
- Do you have it in stock actually?
We collect every week’s order and deliver in Friday. You can catch up with this week’s delivery if you arrage the payment before Friday.

- thanks you very much if you can answer me and give the EMS shipping cost to Spain.
The postage of one set Binary-900V2.0 kit to spain Via.EMS is USD63.00

Our Paypal account (peakha@126.com) could receive the fund from the credit card.



Harry

Quote:
Originally Posted by lebenj
i tried to contact peak hobby, but they do no respond me....

someone can give me an Email from them?
the only one i found was webmaster@peak-hobby.com

i was looking for 1meter DLG, and definitly i would like to buy this one.

Thanks
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Old Sep 03, 2009, 08:01 PM
Registered User
Joined Dec 2006
54 Posts
Chris

You can vist Peak-hobby photo album :
http://peakhobby.photo.163.com

Harry
Quote:
Originally Posted by krisch
HI Harry

Could you post some photo's and my be a u tube video of the new version of the binary 900? It looks good on the website, but i would like a closer look before i commit to buying one.

regards
Chris
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Old Sep 04, 2009, 04:18 AM
Rotozuk's Avatar
United States, CA, Novato
Joined Sep 2003
5,855 Posts
So, who has a version 2 flying.. any thoughts? Video?
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Old Oct 06, 2009, 01:57 PM
The original Flying Pigs Sqd.
Up&Away's Avatar
Netanya, Israel
Joined Aug 2002
10,087 Posts
Quote:
Originally Posted by Peakha
Chris

You can vist Peak-hobby photo album :
http://peakhobby.photo.163.com

Harry
Hi!

The pictures there of the B900 shows a wing with ailerons. Is that a mod or standard?
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Old Oct 08, 2009, 07:08 AM
The original Flying Pigs Sqd.
Up&Away's Avatar
Netanya, Israel
Joined Aug 2002
10,087 Posts
I think I found the answer already. The new B900 is A/E controlled.

How thick is the wing? Would servos like the HS45 (or similar size) fit?
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Old Oct 08, 2009, 09:32 AM
a.k.a. Matt Nelson
MattN's Avatar
North Tustin, CA
Joined Oct 2008
1,815 Posts
Quote:
Originally Posted by Up&Away
I think I found the answer already. The new B900 is A/E controlled.

How thick is the wing? Would servos like the HS45 (or similar size) fit?
If it's anything like the original B900 (and I suspect it's pretty much identical), the wings are quite thin. You'd probably do best with D47's all around - they are small and fit upright in the fuse. HS45's are way too big - too heavy, too. The key to get thermaling ability out of this glider is to build it as light as you possibly can.

-matt
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Old Oct 25, 2009, 09:55 PM
cai
Registered User
Joined Apr 2008
2 Posts
B900 v1 wing joint whole position

Hi, lost the building instructions while moving and cannot find the precise position (from LE or TE) for the 3 joint wholes in the wing. Would somebody be so kind and mail the precise position (mm prefered but not limited to ) to caiuwe65 at gmail dot com. Thanks in advance, Cai
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Old Oct 25, 2009, 11:13 PM
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Soledade-RS-BRASIL
Joined Feb 2003
22 Posts
I could send to you the entire manual. Just give-me your e-mail.
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Old Oct 26, 2009, 12:01 AM
cai
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Joined Apr 2008
2 Posts
Sweet, is in your pm inbox. Thanks a lot!
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