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Old Mar 25, 2014, 09:47 AM
Team WC2013 F3K
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EGIDA E light - possible 53oz-ish F5J glider

Got the light glider today. Flawless build and yet light.

One could easily build below 54oz with the lightest gear. However, I'll go for more power/higher climb rate ( approx 2,5 oz/70g weight penalty) to increase the tactic aspect of F5J flying. What surprises me are the sturdiness and stiffness with such low weights of the parts. I had anticipated weaker rudders and softer wings.

I hope I get it maiden in a week.....

weights:
Wing L 410g
Wing R 419g
V tail L 29g
V tail R 29g
Fuselage 220 g
Joiner 59g
Small parts 20g
Empty weight 1186g


/Jonas Ekman
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Last edited by oakman7004; Apr 05, 2014 at 04:19 PM. Reason: topic to ...ish
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Old Mar 25, 2014, 08:06 PM
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Old Mar 28, 2014, 07:06 AM
Kyle Clayton
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United States, VA, Dinwiddie
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Wow, definitely interested in this. I couldn't imagine an F5J version a full 10oz lighter than my pure Egida.
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Old Mar 28, 2014, 02:40 PM
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Much of the weight reduction are from the wings. No D-box, but a balsa support lengthwise /paralell to the torquerod for the aileron do support the skins and a across the wing. se picture. I would have guessed that this would not have worked as well as it does. The wing is glass and I guess its 49g+25g or 105g but I'm not sure here ...

The fuselage is also light and here Müller shaved weight from the "wing shoulder" and towhook area. He kept carbon at the motor mount and 10 cm back as well as the 10 cm in front of the wing LE. Dork landings should be doable. The aft part of the fuselage seems stiff when I try to bend it and can't se flaws torsion wise either. Either he has a sandwich construction or the "big" diameter is helping.

The only thing I believe is overbuilt is the wing joiner. This one seems to be way to strong. But I might be wrong.

/Jonas Ekman
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Old Mar 30, 2014, 07:46 PM
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Your saying airframe weight at 1186grams??
That's a little over 42oz,, not sure below 54 that easily achievable
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Old Mar 31, 2014, 08:38 AM
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If we swag some numbers,

Motor 6, Battery 3, Servos .7 each (4.2), Receiver .5, ESC .5, Spinner and prop 3 oz.

Say 18 ounces with wire. 42+18 = 60. Even at 60 ounces on a 3.6M wing that glider is light.

But is it too light? Is there room for ballast?

One of our club members has a 60 ounce e-Supra Pro and he feels it is too light since there is no place to put ballast. Any significant wind and he struggles.
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Old Mar 31, 2014, 03:34 PM
Kyle Clayton
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United States, VA, Dinwiddie
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My TD Egida is 65oz, I've never found a need for ballast in some pretty hectic air. If the winds got so bad that it warranted that, I don't think the contest would be running
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Old Mar 31, 2014, 04:30 PM
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Quote:
Originally Posted by aeajr View Post
If we swag some numbers,

Motor 6, Battery 3, Servos .7 each (4.2), Receiver .5, ESC .5, Spinner and prop 3 oz.

Say 18 ounces with wire. 42+18 = 60. Even at 60 ounces on a 3.6M wing that glider is light.

But is it too light? Is there room for ballast?

One of our club members has a 60 ounce e-Supra Pro and he feels it is too light since there is no place to put ballast. Any significant wind and he struggles.
The system I am flying in my light Maxa -- Powerline Motor 3.5 oz, Battery 2.6 oz., servos (6 -- MKS 6100s) 2.0 oz., Prop/Spinner/Hub 1.5 oz., Jeti ESC 1.3 oz., Receiver 0.5 oz. 11.4 oz. total. (200 meters in 24-25 seconds.)

As to being too light, one of my friends flew an Egida in a windy TD meet down in Dallas and guys were loading up with 15 or more ounces and he flew it dry and it flew very well.

I'm not sure the Egida is for everyone, but it is a VERY capable plane.

Happy Landings,

Don
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Old Apr 01, 2014, 03:25 AM
Team WC2013 F3K
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Well never said 53 oz would be easy. Some guys are experimenting with 2,5oz motors and 2oz battery so I belive it would work, but not to be easy to acheive....

However I'm not going that path until a Championship is there....I'm going for PoP setup. Plenty of Power that is.

I general and most times weight aren't of any concern. A sub 65 oz glider is a light glider and will win competitons if flown properly.

As said the Leomotion motor 3013-5000 6,7:1 will be a sweet motor for this glider and I can't wait to get if airborne.

The Leomotion motors, http://www.leomotion.com/ are (for those who do no now) the brand from the former F5B worldchampion Urs Leodolter and in my opinion among the very best motors you can buy.

/Jonas Ekman
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Old Apr 02, 2014, 02:33 PM
Team WC2013 F3K
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I had to fly some, since I'm waiting for the servos. I really like this one but I really want to get a lighter one in the air to compare the differences.

/Jonas
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Old Apr 03, 2014, 01:53 AM
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Quote:
Originally Posted by Wave Glider View Post
My TD Egida is 65oz, I've never found a need for ballast in some pretty hectic air. If the winds got so bad that it warranted that, I don't think the contest would be running
Heh I have 1900g strong version and I ballast Egida quite often (I fly Egida mostly only in windy conditions). The heavy aluminum ballast is enough for quite strong winds and when it really blows, one needs even more ballast. Egida is slippery design but in the end there are laws of nature that must be respected. I strong wind it is also much less pilot workload to fly a adequately blasted glider.

Ballasting the F5J fuse seems to be a problem but I guess wing joiner can be used? It is not that far from CG.

As F3J glider I find landings are the biggest problem of Egida. Or then I just have not yet fully trimmed it... But in F5J same landing accuracy is not needed, reducing the problem.
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Old Apr 03, 2014, 02:04 AM
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Quote:
Originally Posted by oakman7004 View Post
Empty weight 1186g
While I am quite happy with Egida, I must say I am not totally satisfied with the structures. With up to date construction Egida could be much better plane. Lighter and stiffer.

As a comparison, a lightweight 3.8m F3J Xplorer having reasonably stiff F3J wing and 20% more area weights 1250g empty. Other current production F3J based F5J planes AUW are typically 1250-1500g. And there is the difference in wing area...

I wonder where the weight comes from? Obviously fuselage is quite heavy. Wing control mechanism? I would also like to see lightweight all carbon wing skins as they are currently the norm in F3J and increasingly also in F5J.
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Old Apr 04, 2014, 10:38 AM
Team WC2013 F3K
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I got some servos today.

I have 4pcs 3156, 2 pcs 3270 and 2pcs 3174 available. So now the big question! Where to use what?

I'm thinking about using 3156 for aileron and V-tail and 3270 for flap. But maybe its bulletproof to use 3174 for flap and 3270 for aileron. Anyone tested the 3270 for flap or aileron yet? I think I would like to test that little bugger....

/Jonas Ekman
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Old Apr 04, 2014, 01:01 PM
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Stronger servos in wing?

Aileros could use a small servo but there seems to a little friction in linkage. I wonder if using small servos will cause centering problems?
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