RE: Xtreme Composite Edge 540 build thread  
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 >> RE: Xtreme Composite Edge 540 build thread
Page: <<   < prev  1 2 [3] 4 5   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: Xtreme Composite Edge 540 build thread - 11/26/2007 2:48:46 PM   
Andprise


 

Posts: 14
Joined: 7/11/2007
From: , HONG KONG
Status: offline 		Thanks BladEagel,

In fact, this is my first gasoline Edge, I have had a foamy edge, they also have a characteristic of easily snap when you try to recover during an error in preforming 3D, eventually, how I deal with it is to apply a small fin on the wing tip like QQ currently imply on his new 86" Yak, but it has lost the ability of preforming extreme 3D, it cannot even snap when u wanted to either, it is a very big trade off.

Anyway, in this composite airplane, there is not much weight I could have reduced from it, and the wing loading in comparison to other 50cc like my EF Yak 54, this x'treme edge is a bit heavy in its size. BTW, could you share the radio setting and the CG setting on you plane, and I am very much interest if you could share your experience in setting this edge to do waterfall either.

At the beginning I was setting the CG at 123mm from the LE of the wing with about 220g lead added behind the nose ring and with all the batteries moving very forward behind the firewall, it is very stable but hovering is very difficult and the harrier roll is also difficult too due to the heavliy nose. With the CG set as per manual, it preform very like a good F3A plane. After serval flights, I reduced around 60g of lead from the nose, the CG on mine now is about 1/4 inches in front of the aileron hinge line measure at the wing tip, after this changes, hovering is a bit easy with not much nose drop correction, but I will continuous to reduce the lead, as the CG doesn't seem right when preform harrier roll, the nose seems to swing during this manuver.

The setting on my Edge: the Aileron 30degree with expo 40%, elevator 40 degree with expo 50%, and rudder 45degree with expo 50%, and forgot to mentioned, 2 of my hinges out of 4 at the rudder was broken after around 12 aggressive 3D flights, I was lucking did not crash it, it went into snap roll after a normal stall turn, I could manage to recover it almost at round 20 ft. I landed and check the plane all over, then I found those hinges were broken, I was worried about the size of those hinges during assembly, now I realised that it was not the size (only 3mm) to handle aggressive 3D, I changed it to a 5mm size hinge and went to fly on last Sunday, I tested it after 4 round of aggressive 3D, they stay strong on the position.

(in reply to BaldEagel)
       Post #: 51

RE: Xtreme Composite Edge 540 build thread - 11/27/2007 1:16:09 PM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Andprise

I have found the tip force generators to be great fun for knife edge, harriers, elevators even the prop hang, but as you say they slow the roll rate down too much for snap manouvres or anything requireing an aileron input, their main disadvantage was the reduction in ground clearance on landing.

To be quite honest I havn't tried to do a waterfull, so my set up would not be very helpfull to you, however for what its worth the CofG is at about 130mm from the LE at the root, Aileron same as yours, elevator, I can only get 32deg up and 36deg down movement restricted by the tailplane gap, expo 40%, rudder as yours, if you look back on this thread you will see I did not use the rudder hinges supplied, I considered them not strong enough and did not penetrate the fin post far engough either. (see post 19)

On another thread a chap with a 2.3M did not head the warning to not use ball links on the Phenolic produced arms and paid the price, snapped the horn on take off and rolled into the deck, the supplied horns are horid and I would not use them on any plane of mine let alone a 50cc petrol one.

Forgott to ask: did yours come with the additional former behind the cockpit as shown in post 13?

Mike
2188

< Message edited by BaldEagel -- 11/27/2007 1:31:58 PM >

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Andprise)
       Post #: 52

RE: Xtreme Composite Edge 540 build thread - 11/27/2007 3:16:55 PM   
Andprise


 

Posts: 14
Joined: 7/11/2007
From: , HONG KONG
Status: offline 		You are much wiser than me to change those hinges before flight, I saw that the movement of your Rudder were limited by the gapless stuff in the fin and the rudder, I did trim it about 1.5mm off before the installation of the rudder to enable the movement of the rudder up to about 45degree.

Mine come with the addition former, I do not have to make one, but I reinforce it by putting an additonal carbon strip at the bottom of the former, and I also applied an additonal carbon strip in between the former near the rudder servo.

BTW, how do you rate you MVVS 58 engine, in fact I am consider to buy one either.

(in reply to BaldEagel)
       Post #: 53

RE: Xtreme Composite Edge 540 build thread - 11/27/2007 3:40:22 PM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		I have the MVVS 45 in this airframe and I rate it highly against any of the other 50cc engines out there, The 58 Pro I have is much more powerfull than any of the other engines in its class and I would go as far as saying above its class as well, the new DA 85 will possibly be above it, but there are none run in around my area to compare it too at the moment, I have the 58 in a QQ 85" Yak and its insane it is far too much power for the airframe, but by only using half throttle during the flight the noise is rearly subdude which was the point of putting it on in the first place, its turning a 22x10 three blade Mejzlik at 7,200rpm and its at that point I chickened out, I did not let the engine rev any higher and I have restricted my throttle to ensure it does not over rev, this is not enough prop for it.

The movement of my rudder is more than adequate, I am afraid possibly its lost its meaning in translation, my original comment was said in irony.

Mike
2202

< Message edited by BaldEagel -- 11/27/2007 3:42:22 PM >

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Andprise)
       Post #: 54

RE: Xtreme Composite Edge 540 build thread - 12/21/2007 5:03:38 PM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Couple of pics with the logo's now on, just need to paint the engine cowl and tail and add the cockpit deatail to be 100% then I need some decent weather.

Mike

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


_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to BaldEagel)
       Post #: 55

RE: Xtreme Composite Edge 540 build thread - 1/31/2008 4:50:31 PM   
blaiss


 

Posts: 10
Joined: 9/13/2006
From: New Albany, OH, USA
Status: offline 		Sorry, Brain cramp...

< Message edited by blaiss -- 1/31/2008 4:54:36 PM >

(in reply to BaldEagel)
       Post #: 56

RE: Xtreme Composite Edge 540 build thread - 1/31/2008 4:51:57 PM   
blaiss


 

Posts: 10
Joined: 9/13/2006
From: New Albany, OH, USA
Status: offline
quote:

ORIGINAL: BaldEagel

WARNING

There is a former missing from the plane and kit contents, this former fits at the rear of the canopy and stiffens the fus between the the rear wing fixing and the spar tube, it would be well to check and fit one if yours is missing. This has been verified by my supplier.

Mike

I inspected my Xtreme Composite Edge 2X2 and found the former missing as well. I contacted Bob at BVM and inquired on replacements. He was not aware of the defect, but he is making me the piece and shipping it free of charge. So if anyone else is missing the former from their BVM Edge 2X2, give them a call.

(in reply to BaldEagel)
       Post #: 57

RE: Xtreme Composite Edge 540 build thread - 1/31/2008 4:57:46 PM   
blaiss


 

Posts: 10
Joined: 9/13/2006
From: New Albany, OH, USA
Status: offline 		Mike, do you consider the aileron and elevator "hinges" satisfactoy as they come, or did you do any modification to them?

(in reply to blaiss)
       Post #: 58

RE: Xtreme Composite Edge 540 build thread - 1/31/2008 5:34:30 PM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		I have not done any modifications to the hinge's at all, looking as close as I can they seem to be kevlar sheet laminated into the skin, they are the same as the 2.6 Edge that Xtreme manufacture so if its good enough for..............etc.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to blaiss)
       Post #: 59

RE: Xtreme Composite Edge 540 build thread - 3/28/2008 12:30:21 PM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		3489 hits on this thread so far, not bad for an obscure plane.

If fly's like a dream, as long as you treat it with respect, it will snap if you try to force the manouvres, but this makes it possibly the most perfect plane for snap rolls I have ever seen, takes half a trun to come out of a spin, but will blender very flat and you can slow it down in the blender as well.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to BaldEagel)
       Post #: 60

RE: Xtreme Composite Edge 540 build thread - 4/2/2008 8:18:15 PM   
Neil Guildford


 

Posts: 389
Joined: 1/2/2003
From: Guildford, UNITED KINGDOM
Status: offline 		I've just finished mine and was surprised by its all up weight of 15.8lb. The CG is set at 142mm with no added lead...is anyone flying it that far back?

I'm using:

Hacker A60 14L
Hacker 90 OPTO esc
22 x 12 prop
10S 6000mah Polyquest cells (in the nose)
JR 8511's all round.

I like to fly a mixture of things with some hovering thrown in....should I add some lead to save a nasty flick on landing or will this plane take it?

Thanks
Neil

(in reply to BaldEagel)
       Post #: 61

RE: Xtreme Composite Edge 540 build thread - 4/3/2008 12:33:17 AM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		I am supprised at your weight as well, I got mine to 15.8 Lb with 9.5onz of lead in the nose to get the C of G to the 122 mm as per the manual, but mine is a floater when its used up most of its fuel so your should be too. I have only had the chance to fly mine once so far as the weather has conspired against me since, so my C of G is not finalised.

With your C of G I would try the stall at high level to see if it flicks, or alternativly pull lots of elevator and see if it stays in the turn, if you want to slow it down on approuch reflex both ailerons up on a mix at low throttle, switched obviously for landing, this adds washout and increases landing descent rate whilst under full control and gets rid of any flick tendancy.

Mike

< Message edited by BaldEagel -- 4/3/2008 12:40:45 AM >

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Neil Guildford)
       Post #: 62

RE: Xtreme Composite Edge 540 build thread - 4/3/2008 1:45:25 AM   
Tired Old Man


 

Posts: 12030
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		An Edge is an Edge. The farther forward the c/g is the snappier it will be. Properly balanced, which will be fairly neutral, and you'll find it hard to stall (flick) the plane. It will just mush forward. Keep experimenting with the c/g by moving it farther and farther aft. When the plane no longer requires any down elevator to hold level inverted flight you're as far back as you want to go. Add a few grams of lead to the nose from that point and I'm certain the snap issues will be gone forever.

_____________________________

If you can''t fix it with a hammer, you have an electrical problem.

(in reply to BaldEagel)
       Post #: 63

RE: Xtreme Composite Edge 540 build thread - 4/3/2008 10:46:40 AM   
BaldEagel



Posts: 4305
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Now that is interesting, I suppose logic would say that moving the C of G closer too the C of P would make the wing more stable, but reduce the longitudinal stability, I have a very snappy Yak that I don't bother to fly anymore because of it, perhaps I ought to try again with a more rearward C of G, I will give that a go and see what happens.

Thanks Pat.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Tired Old Man)
       Post #: 64

RE: Xtreme Composite Edge 540 build thread - 4/3/2008 3:47:36 PM