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Old Oct 02, 2009, 10:26 AM
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Hi FF,

Last Sunday was windy. 15 MPH wind sock sticking straight out and gusts in the 20 mph range. I flew the AVA with a buddy who was flying a glass Supra.

The AVA was getting bounced around more, but penetration was not a problem. I was able to follow the Supra around fine. This was with the lighter 3C pack for ballast. The heaver pack was not needed.

That said, I wont fly it in conditions like that again, if for no other reason than wet towels where needed to keep it on the ground, and the thermals get so broken up they are well above my skill level to utilize with out a guide.

I think the penetration reputation tagged to AVAs most likely came from un ballasted pure glider AVAs in the 40oz range. The AVA-Es in the 60oz range are quite a bit heaver. Additionally the Pro versions have less drag and penetrate even better.


Best,

Branwell
Last edited by branwell; Oct 02, 2009 at 10:35 AM.
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Old Oct 02, 2009, 03:00 PM
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Quote:
Originally Posted by branwell
...Last Sunday was windy. 15 MPH wind sock sticking straight out and gusts in the 20 mph range. I flew the AVA with a buddy who was flying a glass Supra.

The AVA was getting bounced around more, but penetration was not a problem. I was able to follow the Supra around fine. This was with the lighter 3C pack for ballast. ....
That high-wind performance seems pretty good! And it suggests that your 4M AVA could benefit quite a bit, on a calm day, from being substantially lighter, if that can be managed. Seems like you would need a different power system to do so??

FF
Old Oct 02, 2009, 03:27 PM
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Quote:
Originally Posted by Forest Flyer
And it suggests that your 4M AVA could benefit quite a bit, on a calm day, from being substantially lighter
I have been competition flying my heavy 59oz Super AVA-e against lighter AVAs all year, and beating them, even on calm days. Although the min sink of a lighter AVA may be a tiny amount lower, the wider speed range (and maybe crisper handling?) of the heavier model seems to more than compensate for this.

Neil.
Last edited by Neil Stainton; Oct 02, 2009 at 04:40 PM. Reason: typo
Old Oct 02, 2009, 03:42 PM
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That is interesting, Neil. And scaling-things up a bit from your Super AVA, it sounds like 65 oz might be a good operational AUW for the 4M AVA.
Old Oct 02, 2009, 04:15 PM
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Hi FF,

Would the 4M AVA be better lighter?

In super light lift with little wind, probably, but as Neil mentioned, its pretty good with a little weight on board and had a wider flight envelope.

B
Old Oct 02, 2009, 07:33 PM
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Thanks for posting those great flying shots. What state are you in ? It's not on your user info. Looks very nice there.

Bob in Seattle
Old Oct 02, 2009, 08:57 PM
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Northern VA Bob. About 1.5 hours west of DC.
Old Oct 02, 2009, 10:07 PM
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That's very pretty back there. I've seen it on the travel channel.

Bob in Seattle
Old Oct 03, 2009, 07:48 PM
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Thanks for the beautiful pictures..
What an amazing sailplane..and it does it all with RES
Old Oct 04, 2009, 07:28 AM
Andy W is offline
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Quote:
Originally Posted by branwell
I think the penetration reputation tagged to AVAs most likely came from un ballasted pure glider AVAs in the 40oz range. The AVA-Es in the 60oz range are quite a bit heaver.
My AVA-E is 52oz..
..a
Old Oct 05, 2009, 06:31 PM
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Now Andy. Your AVA must be Spayshal
Old Oct 05, 2009, 06:46 PM
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Todays changes included swapping out the 3 cell A123 pack for a Hyperion G3 3300 3C Lipo.

I remounted the motor so the speed controller would mount on the fuse side to allow more depth so the hatch can close.

The Hyperion weighs almost exactly the same as the A123, has 1000ma more capacity, and a heck of a lot more current.

How much more current?

Well on the 4th jaw dropping climb, I heard something akin to a gun shot, and the climb came to an abrupt halt.

Upon landing, I discovered one of the blades of the Aero Naut 16-10 prop, not liking the Hackers new found grunt, had departed for warmer clines. ( little bastard didn't take me with it )

The resulting vibration was enough to dislodge the hatch ( luckily held on with a rubber band ) and disconnect the battery.

I have an RF 17-10 that is somewhat tougher. Will give that a go.

Branwell
Last edited by branwell; Oct 05, 2009 at 08:48 PM.
Old Oct 05, 2009, 06:52 PM
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Another change I made today was to mount the antennas for the 2.4 radio externally.

Yesterday while flying at the limit of my sight, I felt like I was loosing control intermittently. Admittedly, it was windy and choppy and the plane might have been caught in some sort of saver high altitude turbulence, but.......

Branwell
Old Oct 05, 2009, 08:19 PM
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Quote:
Originally Posted by branwell
....The resulting vibration was enough to dislodge the hatch ( luckily held on with a rubber band ) and disconnect the battery....
Well, that could have been much worse! I am surprised that the nose is still intact. No doubt that the fist few flights are always the most perilous for a new plane.
Old Oct 06, 2009, 11:23 PM
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branwell,
I had fits with my AR6250 rx antenna under the wing like yours, on my 2m Poly Pulsar. Hold light flashing all the time after a flight. Perhaps with the carbon fibre D wing "box" or CF servo cover nearby, had glitching from time to time, on this setup.

Later I moved antenna back further on the fuselage, and angled downward almost at 90 degree to each other. No more glitching, or hold light flashing. Flew two flights today, pretty far away and high.
Of course you can check this out with a data logger. I just have the internal "hold" light to warn me of trouble. And I don't have your remote either.

just an idea, ray
Last edited by 320pilot; Oct 08, 2009 at 11:41 AM. Reason: added one picture of antenna


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