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Old Sep 27, 2012, 11:25 PM
chuck
santa barbara, CA
Joined May 2009
3,941 Posts
Quote:
Originally Posted by alpea 41 View Post
To me the F-22 seemed to be the most draggy of the 6 or 7 planes I've seen fly . But the new version 2 seemed a little quicker on 3 cells.
is the new version different or just not bent ?
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Old Sep 27, 2012, 11:37 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
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Just new.lol
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Old Sep 27, 2012, 11:56 PM
chuck
santa barbara, CA
Joined May 2009
3,941 Posts
half the drag issues w/ my 22 is the design and the other half is left over warps after removing 75% when new. worst airframe i have ever bought , warpwise. a straight one would be cool.

chuck.
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Old Sep 28, 2012, 12:02 AM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
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Mine too. The new one was warp free 3 or 4 weeks ago.
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Old Sep 28, 2012, 01:07 AM
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boingk's Avatar
NSW, Australia
Joined Feb 2011
2,120 Posts
Hi there guys, I've had a Panther F9F 50mm in the past which I kept stock, and ordered another airframe for it as the current one needs some TLC to say the least.

Hobbyking sent me an L-39 Albatross instead... which I actually like!

My current plan is to use an AEO 50mm / 5800kv EDF setup with a 30A ESC in airflow and Turnigy NanoTech 45C 1000mAh 3s lipo packs.

Does that sound alright? I haven't designed an EDF power system before and was wondering if I'd overlooked something completely obvious.

Cheers - boingk
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Old Sep 28, 2012, 02:20 AM
Luck is my skill
queadlunnrau's Avatar
United States, WA, Redmond
Joined Jun 2009
1,066 Posts
Yo how did the f22 fly with the tv setup, looks pretty clan and I liie usong the clear plastic to hide it in flight
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Old Sep 28, 2012, 09:35 AM
chuck
santa barbara, CA
Joined May 2009
3,941 Posts
Quote:
Originally Posted by alpea 41 View Post
Mine too. The new one was warp free 3 or 4 weeks ago.
was that from b/h or?
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Old Sep 28, 2012, 09:44 AM
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gooniac33's Avatar
Sunnyvale
Joined Feb 2009
4,961 Posts
Quote:
Originally Posted by boingk View Post
Hi there guys, I've had a Panther F9F 50mm in the past which I kept stock, and ordered another airframe for it as the current one needs some TLC to say the least.

Hobbyking sent me an L-39 Albatross instead... which I actually like!

My current plan is to use an AEO 50mm / 5800kv EDF setup with a 30A ESC in airflow and Turnigy NanoTech 45C 1000mAh 3s lipo packs.

Does that sound alright? I haven't designed an EDF power system before and was wondering if I'd overlooked something completely obvious.

Cheers - boingk
That fan will work great! But if you can go up in the battery size. A 1300 would be a little better since it is gonna pull more amps. I have had an L-39 for almost 2 years now and it is still one of my faves! If you fly around at 1/2 throttle you can get some good flight times. And it is fast too! great all around plane...
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Old Sep 28, 2012, 10:05 AM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
9,910 Posts
The F-22 w/ T V was slower than stock. It also was a little nose heavy w/ a 1000ma 4s battery. It high alpha-ed nice but you could tell the T V vanes took away from thrust. The V2 F-22 is from B H.
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Old Sep 28, 2012, 10:46 AM
chuck
santa barbara, CA
Joined May 2009
3,941 Posts
thanks on the b/h , and ,ya the 22 is nose heavy and hates it , i moved my cg back from stock callout and will never go back.
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Old Sep 28, 2012, 01:32 PM
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boingk's Avatar
NSW, Australia
Joined Feb 2011
2,120 Posts
Quote:
Originally Posted by gooniac33 View Post
That fan will work great! But if you can go up in the battery size. A 1300 would be a little better since it is gonna pull more amps. I have had an L-39 for almost 2 years now and it is still one of my faves! If you fly around at 1/2 throttle you can get some good flight times. And it is fast too! great all around plane...
Thanks mate, very much appreciated. If she's tailheavy I will put a larger pack in (another HK order!) but otherwise I plan on keeping it light on the throttle unless I'm doing vertical or lowfield passes. I know these birds suck the mAh

- boingk
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Old Sep 28, 2012, 02:17 PM
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Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,405 Posts
Quote:
Originally Posted by boingk View Post
Hobbyking sent me an L-39 Albatross instead... which I actually like!

My current plan is to use an AEO 50mm / 5800kv EDF setup with a 30A ESC in airflow and Turnigy NanoTech 45C 1000mAh 3s lipo packs.

Does that sound alright? I haven't designed an EDF power system before and was wondering if I'd overlooked something completely obvious.

Cheers - boingk
Well, I had to use a 3s 1000 mAh pack to get the CG correct when using the stock motor and fan. That AEO fan is going to draw 31A at wide open throttle and if you use a 1000 mAh pack, it's going to run out pretty quick. Using a larger pack will likely make it nose heavy unless you start cutting and moving the battery rearward. I personally think you'll need to use a higher capacity speed controller, and have multiple lipos on hand. Fly for a couple minutes, land and swap packs. I would also use 40C cells with that fan or the lipos will get really toasty.
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Old Sep 28, 2012, 04:17 PM
chuck
santa barbara, CA
Joined May 2009
3,941 Posts
i agree w/ joe , another thought is to try to move the fan back so u can carry the bigger battery. w/ that kind of current draw the smaller packs just dont work well , even at 2 min flights u cant really use the power as battery heating is such an issue if u want any cycle life out of the pack.

i moved the wicked/wemo combo back in my screamer and now i can use a1600 and still get cg w/ no tail weight . at 30 amps wfo my flight times are still only 3 minutes w/ just a couple of full bursts but at least the battery is just warm.

chuck.
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Old Sep 28, 2012, 04:36 PM
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dahawk47's Avatar
United States, TX, Keller
Joined Jul 2011
2,630 Posts
I'm ready to put together my new Katana. Any tips? I received motor and balanced fan from Don's. Nicely done. Looks like this plane is not very servicable. Once you mount the wing to the fuse, it's gonna be hard to get at the esc if necessary. On the servo tray for the elevators and rudder, is it safe to assume they are both mounted in the same orientation?

Battery placement. A deep cabin. Have the rx mounted on the vertical wall. An 850-1300mah 3S or 4S might be better mounted along it's side.

Anyone else have this bird? Have not seen very much discussion which is a bad omen.

-Hawk
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Old Sep 28, 2012, 05:31 PM
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Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,405 Posts
Quote:
Originally Posted by dahawk47 View Post
I'm ready to put together my new Katana. Any tips? I received motor and balanced fan from Don's. Nicely done. Looks like this plane is not very servicable. Once you mount the wing to the fuse, it's gonna be hard to get at the esc if necessary. On the servo tray for the elevators and rudder, is it safe to assume they are both mounted in the same orientation?

Battery placement. A deep cabin. Have the rx mounted on the vertical wall. An 850-1300mah 3S or 4S might be better mounted along it's side.

Anyone else have this bird? Have not seen very much discussion which is a bad omen.

-Hawk
I can't comment on the Katana yet, mine is on the way and should be here soon. I have lots of power system options sitting here just waiting, I just need to see what I'm dealing with before settling on the final setup.
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