| Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube |
|
|
|
|||||||
| Register | Members List | Wattflyer Extras | Articles | Search | Today's Posts | Mark Forums Read | Social Groups | Photo Gallery |
| General Electric Discussions Talk about topics related to e-powered RC flying |
| Thank you for your support (hide ads) | |
|
|
|
 |
|
|
Thread Tools | Display Modes |
11-03-2009, 02:48 PM
|
#1 | ||
|
Member
Join Date: Oct 2007
Location: Lewiston, Clarkston valley
Posts: 154
Thanked 10 Times in 10 Posts
iTrader: (0)
Friends: (3)
|
Good morning.. Balance point help, please..
Hello everyone... I bought a Bi-plane at the local fly in a few years back and converted it from gas to electric.
I have no clue were to start to balance it. the plane has a straight bottom wing and the top wing is forward about 1 to 2 inches, and tapers back. If I use the bottom wing it's nose heavy, if I use the top wing it's tail heavy. I'm just looking for a good starting point. the two wings are about 34 inches or so span. thanks everyone, and it is cold this morning....... |
||
|
|
|
11-03-2009, 03:12 PM
|
#2 | ||
|
Community Moderator
Join Date: Aug 2005
Location: Sunny San Diego Ca
Posts: 2,300
 36
Thanked 271 Times in 221 Posts
Club: Silent Electric Fliers of San Diego & Miramar RC Flyers of San Diego
iTrader: (18)
Friends: (43)
|
LD, can you post a photo of the plane? Someone may know what it is and be able to tell you exactly.
|
||
|
Electricity... It's not just for light bulbs anymore.
Project Globetrotter Participant 7/09 Wings Across America Participant 6/10 AirfoilZ Factory Field Rep Heads Up RC EDF Jet Pilot Polks Hobbies Tracker III Pilot |
|||
|
|
|
|
11-03-2009, 03:18 PM
|
#3 | ||
|
Still Learning
Join Date: Sep 2006
Location: North of Boston
Posts: 3,305
67
Thanked 393 Times in 366 Posts
Club: Cape Ann RC Model Club
iTrader: (6)
Friends: (47)
|
Here's a diagram for finding CG on biplanes with unequal sized wings.
You still have to determine the Mean aerodynamic chord for the swept wing. If you get me the wing area of each wing I can help you determine the CG. Knowing the plane will help a lot too. Paul |
||
|
|
|
11-03-2009, 05:38 PM
|
#4 | ||
|
Member
Join Date: Oct 2007
Location: Lewiston, Clarkston valley
Posts: 154
Thanked 10 Times in 10 Posts
iTrader: (0)
Friends: (3)
|
I'll do that...
I'll take a shot of it tonight and post tommorrow, thanks.
|
||
|
|
|
|
11-04-2009, 03:38 PM
|
#5 | ||
|
Member
Join Date: Oct 2007
Location: Lewiston, Clarkston valley
Posts: 154
Thanked 10 Times in 10 Posts
iTrader: (0)
Friends: (3)
|
Here's a coupla pictures of the bipe....
the plane weighs in at 2 pounds all up. both wings measure 36 x 5 inches.
any help would be great, sorry about the phone pics. |
||
|
|
|
|
11-06-2009, 06:00 PM
|
#6 | ||
|
Member
Join Date: Oct 2007
Location: Lewiston, Clarkston valley
Posts: 154
Thanked 10 Times in 10 Posts
iTrader: (0)
Friends: (3)
|
I really thought one of you would jump on this...
Nobody knows who made this plane, huh?
I guess I'll "wing" it on the balance point. You have to admit that was good. 
|
||
|
|
|
|
11-06-2009, 06:01 PM
|
#7 | ||
|
Community Moderator
Join Date: Aug 2005
Location: Sunny San Diego Ca
Posts: 2,300
36
Thanked 271 Times in 221 Posts
Club: Silent Electric Fliers of San Diego & Miramar RC Flyers of San Diego
iTrader: (18)
Friends: (43)
|
Hedge your bet on nose heavy ok?
It will fly with the balance forward, but not with it aft. |
||
|
Electricity... It's not just for light bulbs anymore.
Project Globetrotter Participant 7/09 Wings Across America Participant 6/10 AirfoilZ Factory Field Rep Heads Up RC EDF Jet Pilot Polks Hobbies Tracker III Pilot |
|||
|
|
|
|
11-06-2009, 06:04 PM
|
#8 | ||
|
Member
Join Date: Oct 2007
Location: Lewiston, Clarkston valley
Posts: 154
Thanked 10 Times in 10 Posts
iTrader: (0)
Friends: (3)
|
yea, kinda what I thought...
I figured to start at about 50% of the top wing as a starting point.....
I'll let you know after this weekend. 
|
||
|
|
|
|
11-07-2009, 12:36 PM
|
#9 | ||
|
Still Learning
Join Date: Sep 2006
Location: North of Boston
Posts: 3,305
67
Thanked 393 Times in 366 Posts
Club: Cape Ann RC Model Club
iTrader: (6)
Friends: (47)
|
Here's a formula for determining the CG.
http://www.palosrc.com/instructors/cg.htm Determine the cg for each wing, then for the combination with the formula in post three. Paul |
||
|
|
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Good Morning.... | yank51 | Humor | 10 | 04-17-2009 09:18 PM |
| Cox micro P-40 balance point? | Aero Ace Ace | Indoor & Micro Electric Planes | 5 | 01-06-2009 05:17 AM |
| Zagi flying wing balance point | nipper | Delta & Flying Wings | 3 | 03-10-2008 10:42 AM |
| Black Horse Liberty - Balance Point | 'Mike' | Beginners | 3 | 11-16-2007 08:08 AM |
| Wild Hawk / Easy Star CG or Balance Point | diverdon | General Electric Discussions | 1 | 06-24-2007 12:03 PM |
Linear Mode
