RE: CG question w/ WH EDGE-540T  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> WildHare R/C Support >> RE: CG question w/ WH EDGE-540T
Page: <<   < prev  1 [2]

Login
Message << Older Topic   Newer Topic >>
RE: CG question w/ WH EDGE-540T - 6/30/2004 11:26:42 PM   
Scoubidou



Posts: 1569
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Hello Tom,
1) I ordered a DA-50 and i'll order the Edge soon (next shipement). Have you already tried to put a MK belcrank and only one servo for the elevator? It would help to balance the CG instead of moving both batteries pack to the firewall?


2) What's the cost of the WH Edge 540 'light package' and what does it include (CF wing tube, FB gear???)?

Daniel

(in reply to rctom)
       Post #: 26

RE: CG question w/ WH EDGE-540T - 6/30/2004 11:58:27 PM   
Nogyro



Posts: 2058
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline
quote:

ORIGINAL: rctom

If you dont want to use washers laminate a 1/16" piece of plywood on to the bottom edge. That ought to be enough to make a test flight and determine if the problem is better/worse/unchanged.

TF


Good idea Tom, I'll give it a try when I get a few extra minutes.

_____________________________

Frank

(in reply to rctom)
       Post #: 27

RE: CG question w/ WH EDGE-540T - 7/1/2004 3:49:40 PM   
mudspike


 

Posts: 88
Joined: 8/20/2003
From: San Pedro Sula, HONDURAS
Status: offline 		Hi all

have just checked again w/ all flying surface and it turned out that the initial measurment was wrong.
R/H main wing was perfectly aligned w/ thrust line
L/H main wing was marginally ok but it seemed that the L/E have to be elevated a bit. so i have done so.
but the problem did exist in R/H elevator.

below is the pic' that showing the deviation of elevator dowel and hole at zero incidence.
as you can see from the figure, L/E of the elevator should have to go downward by 3 degree(1/4" . so i've done so.
really happy to find out that these mod' was the way that could get rid of current up-trim of the elevator.
flight report will soon be followed~

tks
Hughie

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


_____________________________

Try to keep the number of your take-offs, equal to the number of your landings. hee hee

(in reply to Nogyro)
       Post #: 28

RE: CG question w/ WH EDGE-540T - 7/1/2004 6:40:44 PM   
Nogyro



Posts: 2058
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline 		Great photo's. Looks like I need to borrow my buddies incidence meter and start checking!

_____________________________

Frank

(in reply to mudspike)
       Post #: 29

RE: CG question w/ WH EDGE-540T - 7/1/2004 11:26:46 PM   
Tired Old Man


 

Posts: 11994
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		If you are going to use an incidence meter on the main wing, may I suggest that you go down to the local hardware store and purchase a 1/8" x 1" x 3 or 4' piece of aluminum flat stock. You can cut that to a length long enough to span the width of the wing at the root, not the tip. The Robart meter will fit the flat stock that way and you will get a more accurate measurement than you would by measuring at the tips. Just remove the flat bar that comes with the Robart meter and insert the longer new one.

(in reply to Nogyro)
       Post #: 30

RE: CG question w/ WH EDGE-540T - 7/1/2004 11:55:05 PM   
Nogyro



Posts: 2058
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline 		I just got done doing the horizonatal stabs on the Edge. The LS was dead on, and the RS was off 2 1/2 degrees positive(?) I had to lower the leading edge by 2 1/2 degrees. I didn't check the wings because I also thought you would get a more accurate reading by the root. I'll have to pick up a piece of aluminum flat stock. Now for the $64 question: I didn't have to worm out the holes in the stab that the bolts go through. All I had to do was file a bit of wood out of the hole in the fuse where the dowl goes. Do you think the two bolts will hold it in place, or will they slip and let the stab move????

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


_____________________________

Frank

(in reply to Tired Old Man)
       Post #: 31

RE: CG question w/ WH EDGE-540T - 7/2/2004 5:02:09 AM   
mudspike


 

Posts: 88
Joined: 8/20/2003
From: San Pedro Sula, HONDURAS
Status: offline 		Nogyro..

it will take you only 5 minute or so to glue thin or thick fly wood on dowel w/ thin or thick cyano.
maybe an additional minute for shaping on this.
why let this be your anguish.

< Message edited by mudspike -- 7/2/2004 5:06:49 AM >

(in reply to Nogyro)
       Post #: 32

RE: CG question w/ WH EDGE-540T - 7/2/2004 5:23:10 AM   
Tired Old Man


 

Posts: 11994
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		They will hold the stab just fine. I've put 30 flights on mine since I did the mod and nothing has moved. On a regular basis I do Walls, Elevators, Waterfalls, and Blenders. If it was going to move, it most certainly would have. I did not add anything to anywhere, just slid the stab locators into the holes and bolted them down.

Put the screws in, get them relatively tight without torqueing the crap out of them and go have fun without any worries.

Pat

< Message edited by Silversurfer -- 7/1/2004 9:27:58 PM >

(in reply to mudspike)
       Post #: 33

RE: CG question w/ WH EDGE-540T - 7/2/2004 10:19:45 AM   
SAL98



Posts: 570
Joined: 1/18/2002
From: Lindenhurst, NY, USA
Status: offline 		On the matter of incidense, could someone explain to me how do you go about finding the incidense of the airframe itself. I know how to check the stab compared to the wings but not how to check the wings compared to the airframe.

(in reply to Tired Old Man)
       Post #: 34

RE: CG question w/ WH EDGE-540T - 7/2/2004 2:15:40 PM   
rctom



Posts: 5279
Joined: 5/8/2002
From: Flower Mound (near Dallas), TX, USA
Status: online 		Set the plane up on a solid table without the wheels, sitting on the LG. Boost the tail up to where a level placed on the top of the fuse sides shows a level condition. Make this setup secure so you can handle it.

Now you can measure the wings, stabs, and firewalls. Wings should be 0 deg and firewall should be 90 deg.

TF

(in reply to SAL98)
       Post #: 35

RE: CG question w/ WH EDGE-540T - 7/2/2004 3:24:26 PM   
jon595



Posts: 426
Joined: 3/14/2002
From: Pensacola, FL, USA
Status: offline 		I'm glad that I stumbled upon this thread last night. Just got finished checking mine and the LS wing was dead on, RS wing +1%, LS & RS stab +1 1/2%. It flew with a bunch of up trim. Thought it was really nose heavy but could tell from the control response and flying inverted that it was close to neutral. Should be pretty easy to fix. Thanks for sharing the info with everyone.

(in reply to rctom)
       Post #: 36

RE: CG question w/ WH EDGE-540T - 7/3/2004 4:00:54 AM   
SAL98



Posts: 570
Joined: 1/18/2002
From: Lindenhurst, NY, USA
Status: offline 		Thanks tom, this edge sure makes everything really easy. Was just as easy to check engine thrust on firewall. Just compared it to F1 former.

Flew another gallon threw the plane this evening, about 6 -15 minute flights. Once you start flying this bird you dont want to give up the sticks. I'm at the point know were I'm flying the edge like a small fun fly. Tight 90 degrees Knife edge circles in the middle of the field. And I finally can torque it down on the deck. The best part for me is after I'm done for the day all I have to do is stop by the gas station for a few more gallons and Im ready for another day at the field. I love the smell, sound and cost of gassers..................................

(in reply to jon595)
       Post #: 37

RE: CG question w/ WH EDGE-540T - 7/3/2004 11:53:42 AM   
Nogyro



Posts: 2058
Joined: 11/30/2001
From: Puryear, TN, USA
Status: offline
quote:

ORIGINAL: SAL98
And I finally can torque it down on the deck.


Man, here's another one TRing on the deck. Why can't I get mine down there? I'm still stuck at 50 feet and trying to keep it in a TR.

_____________________________

Frank

(in reply to SAL98)
       Post #: 38

RE: CG question w/ WH EDGE-540T - 7/3/2004 2:14:37 PM   
SAL98



Posts: 570
Joined: 1/18/2002
From: Lindenhurst, NY, USA
Status: offline 		What did it for me was a new engine. This new ZDZ 50 NG has more power than my last one which came apart in flight due to a hairline crack in the casting. The new one is already spinnning 7000 rpm on a msc 22x8 prop after 2 1/2 gallons. The last one would get 6700 after 10 gallons.

When I'm low in a TR It's much much much easier to see and react. And Theres no fear because When it gets a little squirrly I just Blip full throttle and she stands right up (power is a must at the learning stages). Can't wait until the full breakin though, I wont hold a hover to long since its a lot of load on the engine.Maybe 20-30 seconds max.

(in reply to Nogyro)
       Post #: 39

RE: CG question w/ WH EDGE-540T - 7/3/2004 6:03:43 PM   
mudspike


 

Posts: 88
Joined: 8/20/2003
From: San Pedro Sula, HONDURAS
Status: offline 		have just finished 3 sortie of test flight today.
now the elevator trim returned back from up to center.
the aileron also returned back from right to center.
now it does wall perfectly w/out snap and also does elevator like an iron plate w/out any wing-locking.
this made it much easier for me to bring it down on the deck.

there still was tendency to pitch up w/ final approach but it's not noticeable than before.
maybe i can try a bit of up thrust as Tom suggested(should it be down thrust? i/m not sure) or put some weight on nose next time.
as the CG is located at 5" behinf the LE, i guess the latter one is the simplest action that i will take

< Message edited by mudspike -- 7/3/2004 6:15:07 PM >

(in reply to SAL98)
       Post #: 40