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Old Jun 22, 2010, 07:32 PM
Steve_A_Reno is offline
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Planes, Guitars and Cigars
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New problem with my alula. I couldn't get any height on launch and my preset launch set was now giving too much lift, almost looping even if a tossed at a 45 degree angle. also noticed a bit of micro porpoising in the glide that was not there before. I though it may be the CG was off after I repaired the nose. Then I noticed a small crack at the base of the rudder. Could this have caused the issues?
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Old Jun 23, 2010, 09:52 AM
RubSon is offline
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Aeromodeller by heart!
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HI Guys.

I do realize that this model is not an Alula, but anyway....
Some other man-made planes have problems with birds as well. This particular raven really had his mind set on destruction......

Enjoy: http://www.youtube.com/watch?v=A1QKQih7pfg

RubSon
Old Jun 23, 2010, 06:16 PM
wijwoj is offline
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F***in brilliant. Loving these animal encounters. Quality vid there. Looked like he was gonna tear your rudder clean off.
Old Jun 24, 2010, 10:18 AM
RubSon is offline
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Aeromodeller by heart!
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Sorry...

Itīs not my plane, just found the vid at the giant spiders home..............

RubSon
Old Jun 24, 2010, 11:24 AM
Scythe is offline
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I am a recent proud owner of an alula, there hasn't been enough daylight after work to give it a maiden so I have had to try and occupy my anticipation somehow. I decided that a great way would be to make a blog entry. It is really light on the build log, however there are quite a few pictures and I talk about my potential design..

Can't wait to fly it this weekend, check out the blog link. https://www.rcgroups.com/forums/show....php?t=1265181
Old Jun 28, 2010, 04:26 PM
B.Welwood is offline
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Always in the Glue
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Alula Lite


Here's a couple of pics of my completed Alula. My goal was to get the best light air performance possible, so I took some effort to save weight.

The A.U.W. is 5.3 ounces. I removed round wafers of foam from the aft portion of the wing and tail, the cutout pieces in pic 3 weigh 1 ounce. The holes are patched with Ultracote light. Using Michael's 300 m.a. pack in the nose required no additional balast to achieve the c.g. as indicated in the build instructions.

I liked the idea of top driven ailerons and also put some carbon reinforcement into the pod sides. Thanks to all who shared their mods and experience on this thread.

This kit was fun to assemble, I'm glad I bought two.
Old Jun 28, 2010, 04:42 PM
trees is offline
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Slope Sauce
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Quite interesting B. Looking forward to hearing how she holds up. A friend is considering an Alula and I'm thinking he might roll with this idea. I'm curious, do the ultracote patches crinkle (audibly) when the wing flexes?
Old Jun 28, 2010, 04:45 PM
B.Welwood is offline
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Always in the Glue
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No, when I flex the wing the covering just wrinkes a bit.
Old Jun 28, 2010, 04:56 PM
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Have you flown this Alula yet? Intersted to hear about launch/flight performance. I got to fly someone else's Alula this weekend and now am anxious to get mine in the air.

Clay
Old Jun 28, 2010, 05:07 PM
trees is offline
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Slope Sauce
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Cool.

For those interested, your wing loading should be aprx. 2.95 oz. / sq. ft.
Old Jun 28, 2010, 06:54 PM
like.2.fly is online now
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Mike M.
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Quote:
Originally Posted by B.Welwood View Post
Here's a couple of pics of my completed Alula. My goal was to get the best light air performance possible, so I took some effort to save weight...
Nice! Please report on flight performance and keep us informed on durability over time. I don't think it would stand up too well to heavy slope use in the brush, and hawk attacks. But looks great for SAL thermalling.
Old Jun 29, 2010, 04:28 PM
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Always in the Glue
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Quote:
Originally Posted by like.2.fly View Post
Nice! Please report on flight performance and keep us informed on durability over time. I don't think it would stand up too well to heavy slope use in the brush, and hawk attacks. But looks great for SAL thermalling.
I've now put in two trimming sessions (about 35 throws) so far. Weight has now jumped up to 5.5 oz. but I think the c.g. is set fairly close, next task is to get to a slope to gain enough height for a dive test. I'm not a very good thrower, most SAL's yielded 20 to 25 secs of airtime, from maybe 50 feet of altitude.
At this point, the airframe seems to be fairly robust in spite of the 9 chunks of foam removed. Couple of straight down nose-ins from 10 foot stalls, yikes, but the Alula just bounced with no damage. No problems with the ultracote covering.
I'm not sure about others but my Alula needs about 1/8 in. of "down" on the elevons to get a glide. Also very sensitive to pitch change. That's it for now.
Old Jun 29, 2010, 05:30 PM
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Mike M.
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Quote:
Originally Posted by B.Welwood View Post
...I'm not sure about others but my Alula needs about 1/8 in. of "down" on the elevons to get a glide. Also very sensitive to pitch change...
Yup, sounds like an Alula. Just use lots of dual rates on the elevons and very little pitch throw. I can hardly see mine move at all unless I look real close. I'm actually using a bit less throw than the book recommends. I also increased the roll throws to a lot more than recommended. Feels just right to me now. So mix the elevons to very little elevator and lots of aileron.
Old Jul 06, 2010, 05:25 AM
Hoges is offline
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geez, I hope no-one saw that!
Bozo the pilot ! attempting to play catch with his Alula

(if you're not real good at catching your Alula, this might make you feel a little better!!)

Remote Control Boomerang (4 min 24 sec)
Old Jul 06, 2010, 01:51 PM
rockyabq is offline
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Envies his own avatar
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Nice, John. Know just how you feel.


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