RE: Goldberg Ultimate Biplane Engine  
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RE: Goldberg Ultimate Biplane Engine - 6/11/2008 10:31:27 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Here are another few pics I found for trim ideas....

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(in reply to fallingleaf)
       Post #: 101

RE: Goldberg Ultimate Biplane Engine - 6/11/2008 4:32:06 PM   
alfredbmor



Posts: 1030
Joined: 6/1/2005
From: El Paso, TX, USA
Status: offline 		Here is one more to consider:


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(in reply to fallingleaf)
       Post #: 102

RE: Goldberg Ultimate Biplane Engine - 6/11/2008 11:43:36 PM   
Crash Campbell


 

Posts: 104
Joined: 4/18/2007
From: Port MacquarieNew South Wales, AUSTRALIA
Status: offline 		Hi falling leaf/silver fern?

With my second Ultimate I chose the following scheme. I know, I know, I went a little crazy with the star stencils.

Cheers,

Colin

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(in reply to fallingleaf)
       Post #: 103

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 12:47:56 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Crash Campbell,

No Just falling leaf....or All Black! I always thought the most hard to evade combat manouver in an aircraft would be to replicate a falling leaf as it is so unpredictable, so used it as my name. Sadly, I think only something like a UFO could move in such a manner!

That looks pretty cool!

Mark

(in reply to Crash Campbell)
       Post #: 104

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 1:15:26 AM   
Crash Campbell


 

Posts: 104
Joined: 4/18/2007
From: Port MacquarieNew South Wales, AUSTRALIA
Status: offline 		Hi Mark,

Hopefully the Wallabies may give the All Blacks a "run for their money" in the Bledisloe cup this year. I'm an eternal optomist!

Your build looks good and I second your idea of changing the U/C.

The mods on mine are alloy mains bolted with 1/4" nylon bolts to a piece of alloy angle, cf tailwheel assembly, fiberglass cowl, pull/pull on individual elevator halves as well as the rudder, two servos for the four ailerons and powered with a Saito 125a. Set your control throws to the recommended for the test flight but make sure the elevators are on dual rates for landing the min throws arn't sufficient to flair properly. Make sure you have the strip before reducing power to sink in, (from about 1/4 throttle on mine).

Good luck,

Colin

(in reply to fallingleaf)
       Post #: 105

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 2:31:35 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Yeah, they are both as unpredictable as eachother when it comes to the punter spicking who is going to win. Not sure about our side this season so old Richie Macaw seems to be on form...

Nylon bolts sounds like a good idea though 1/4" is pretty massive for the LG. I guess it is good though so if you have a rough landing the bolts will hopfull give out before the LG takes the mounting block withi it! I have reinforced mine using 1/4" aircraft ply and a small fiberglass veneer to join the block to the fuse. Probably overkill but oh well! I may just end up using 3 nylon bolt with blind nuts.

(in reply to Crash Campbell)
       Post #: 106

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 2:43:43 AM   
daveopam



Posts: 4296
Joined: 10/10/2002
From: ELK CITY, OK, USA
Status: offline 		The gear block is easy to fix. The problem is the wheel pants go through the wing on these. Make the gear plenty strong.

David

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"Choose your shirt and shoes by the color. Choose your friends by their character." unknown

(in reply to fallingleaf)
       Post #: 107

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 3:30:33 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Yeah and I like the wheel pants too so want to use them if I can!

These are the colours I will be working with, I also have black, white and Pearl Copper available which is really cool

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(in reply to daveopam)
       Post #: 108

RE: Goldberg Ultimate Biplane Engine - 6/12/2008 4:44:07 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		I am really leaning towars this design...Hangar 9 Ultimate. I would try something a little different with the fuse though

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(in reply to fallingleaf)
       Post #: 109

RE: Goldberg Ultimate Biplane Engine - 6/13/2008 11:57:22 AM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Okay so this bipe is really starting to take shape now!!. Spent my Friday night (lame I know) beveling the elevator halves and the rudder, and hinging them all too. Then I sanded the fiberglass wing joints a little more. I was quite liberal with the epoxy resin so keen to sand it down as much as I can to save weight. I notice that the cloth will become exposed if you sand heaps, so when that happens I put some thin CA on it so seal the exposed cloth. The joints are getting pretty smooth so should show up good. i did mess up the top of the bottom wing a little bit and it is a bit rough, but no matter as thatwhere the fuse sits so may leave that uncovered anyway.

The fuse also got a further light sand and is pretty much complete.

I then proceeded to assemble the cabane and place the top wing on. The 'pin' slided in perfect once I put the 'formed top peice' around the right way (duh! ). Incidence appear to be equal on bottom and top wing which is awesome. I notice the struts did not fit perfect and slightly lift up the wings, so alittle snading will be needed as it is a bit too much of a snug fit.

Next up: Double checking the wings are aligned and sanding the struts to a nice fit; pull/pull rudder setup; more sanding of the fiberglass; switch/battery/reciever mounting.

Stil unsure how the balancing will come out...I may end up with the elevator servos in the belly yet!

I have never seen a model bipe in the flesh and they really are something aye! Far more interesting to look at than a monoplane!!

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(in reply to fallingleaf)
       Post #: 110

RE: Goldberg Ultimate Biplane Engine - 6/13/2008 3:46:34 PM   
alfredbmor



Posts: 1030
Joined: 6/1/2005
From: El Paso, TX, USA
Status: offline 		Straight as a rule, Yes!!
Good job Mark !! I really like those pictures, they speak for their self.


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       Post #: 111

RE: Goldberg Ultimate Biplane Engine - 6/13/2008 11:53:16 PM   
fallingleaf



Posts: 150
Joined: 4/14/2008
From: Auckland, NEW ZEALAND
Status: offline 		Thanks Alfredo, glad you like them I can't wait to see this baby finnished in all its glory....going to be awesome!

(in reply to alfredbmor)
       Post #: 112

RE: Goldberg Ultimate Biplane Engine - 6/14/2008 8:51:42 AM   
MuSo


 

Posts: 9
Joined: 4/22/2004
From: FuengirolaMalaga, SPAIN
Status: offline