Kit Building If you're building a kit and have questions or want to discuss kit building post it here.

Balsa USA Citabria Pro Maiden

Reply

Old 06-05-2004, 08:31 PM
  #1  
Antique
Senior Member
Thread Starter
My Feedback: (4)
 
Antique's Avatar
 
Join Date: Jul 2002
Location: Somewhere, DC
Posts: 9,825
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Balsa USA Citabria Pro Maiden

I built it from the BUSA kit but made a few changes from the plans.

I made the cabane struts removable, they slide into tubes built into the fuse and are secured in place with wheel collars. Making them removable makes building the rest of it easier, also if required, easier to adjust/repair.

I added 6" to the wing, one 3" bay to each end.

After it was framed up and assembled the negative incidence in the wing was very obvious. I checked with BUSA and was told that "the plans are correct". I couldn't buy that so I put a Robart incidence meter on it and measured 2+ degrees negative. I asked how other Pro owners had set theirs and got the full range of answers from leave it negative to 3 degrees positive. Using the Robart meter I set mine at 2 degrees positive.

I made my jury struts fully functional,,, just because.

I powered it with a new Zenoah G23 turning an APC 16/8 prop at 8800 rpm's.

I questioned the CG on the plans, some say 4 1/2" back from the leading edge and some say 3 1/2" back. With the G23 mine balanced at 3 5/8" with no lead anywhere.

Covering and trim is 21st Century fabric. All up dry weight came in at 12 3/4 lbs.

The maiden flight went beautifully. Takeoff run was nice and straight with little or no correction required. The tail comes up nicely, add just a touch of elevator and your flying.

The G23 has plenty of power for everything but unlimited vertical. It will hold full vertical for a few seconds then fall off.

Ailerons are effective, but set up plenty of throw.

I'm going to move the CG back to 3 3/4 to see how it acts.

Low speed stalls end with a mild snap. Had to hold a little throttle and do two wheel landings, no three point,,,,, yet.

I like to fly using lots of rudder, in my opinion it needs all of the rudder throw you can get or a larger rudder.

So far with the changes I've made I'm very satisfied with the plane. When the engine gets broken in I'll get more rpm's and try some different props.
Attached Thumbnails Click image for larger version

Name:	Lj22038.jpg
Views:	9
Size:	111.9 KB
ID:	139818   Click image for larger version

Name:	Cx74837.jpg
Views:	10
Size:	59.1 KB
ID:	139819  
Antique is offline  
Reply With Quote
Old 06-05-2004, 09:59 PM
  #2  
WORNBOOTS
Senior Member
My Feedback: (33)
 
WORNBOOTS's Avatar
 
Join Date: Aug 2002
Location: Princeton, TX
Posts: 1,147
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Balsa USA Citabria Pro Maiden

[sm=thumbup.gif]Nice work,

let us know how she fairs when broken in, please post some updates.
WORNBOOTS is offline  
Reply With Quote
Old 06-14-2004, 09:14 AM
  #3  
Antique
Senior Member
Thread Starter
My Feedback: (4)
 
Antique's Avatar
 
Join Date: Jul 2002
Location: Somewhere, DC
Posts: 9,825
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Balsa USA Citabria Pro Maiden

Six more flights on the C-Pro with the CG set at 4". Much more responsive and a blast to fly. Still need to hold a little power on landing, it's not a low speed floater. I will probably end up building a slightly larger rudder for it.
Antique is offline  
Reply With Quote
Old 06-14-2004, 10:11 AM
  #4  
Patriot
Senior Member
 
Patriot's Avatar
 
Join Date: Aug 2003
Location: Port Orchard, WA
Posts: 687
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Balsa USA Citabria Pro Maiden

I am getting ready to get mine into the air soon as well. The CG seems to be right around what the drawing shows, so we will see how it handles. I may move it forward too.

I also agree about the rudder. From what I here, everyone says it doesn't respond very well. But then, it is a scale plane. Anyway, I may end up building a bigger one as well.

Patriot
Patriot is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service