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Old Mar 18, 2010, 08:12 PM
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grubby's Avatar
Denver Colorado
Joined Jan 2010
921 Posts
The Mini SU-30 video is a raw video Matt @ yardbird put up so I could see the vertical performance of his to compare to mine at altitude.

Matt did inform me that he has video of all the minis and is going to try and get an edited video of it up here shortly but he has been swamped with his normal day job


If you guys could, if you have a mini try and fly it with out the battery tray in and let me know if it make a difference. I am trying to gather som info on this. As a couple people said it actually flew better.
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Old Mar 18, 2010, 11:01 PM
hmph!
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United States, UT, Logan
Joined Dec 2008
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Quote:
Originally Posted by grubby View Post
If you guys could, if you have a mini try and fly it with out the battery tray in and let me know if it make a difference. I am trying to gather som info on this. As a couple people said it actually flew better.
I flew it tonight w/o said battery tray cover. It was a bit windy but it seemed stable and smooth. I don't have any scientific evidence to say it flew better, but it flew just as good as it did with the cover on board. It handles wind great. Verticle harrier style landings into the wind. No rock, no wobble, no ballooning, nice and smooth all the way down. Down wind speed runs put the plane nearly out of sight before I could get it turned around. I don't like the wires hanging out though. Though I didn't notice any problems with this, the wires flopping around on a plane that is so small and light could, in theory, affect cg more than it would on a larger plane. The cover keeps things from dangling.
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Old Mar 18, 2010, 11:51 PM
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Denver Colorado
Joined Jan 2010
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Thanks for the info!

Next time you get a chance fly it when its not windy with and with out that tray if you wouldnt mind.

I have done it and the vertical seemed a little bit better but not by too much.

Also if you like the F22, you should def look into getting the Su-30 when its released to the masses. From what Matt has been telling me it is the best slow flyer of the bunch. I am getting an F22 soon so I will be able to let you know what I think first hand.
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Old Apr 02, 2010, 02:30 AM
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Carmichael, CA
Joined Feb 2007
3,537 Posts
Redeemed DM2203!

First off, I have to apologize to Ken for giving such a glum review of the Motrolfly DM2203 in the past. My latest bench test of my rewound DM2203 turned out awesome, and the reason is embarrassing to mention; it was timing. First off my initial testing of the rewind was done with low timing:

Motrolfly 2203-17T-25awg-Delta
TP 2s910 PL2 (store charged)
29m alt / 16.5C temp
No Load: 7.65V / 0.74A / 22427RPM
Raw Kv = 2932
GWS 5043HD: 6.83V / 10.26A / 15451RPM / 11.6oz / 66.3% effy

The low timing lead to high current, which fried a Plush 10 esc, and was causing sync loss with my Plush 12 (ie. it stalled randomly). Now, with the esc timing set to "middle", the motor flipped a 180 on me:

Motrolfly 2203-17T-25awg-Delta
TP 2s730 PL2 (fully charged)
29m alt / 20.2C temp
No Load: 7.62V / 0.6477A / 21861RPM
Raw Kv = 2869
GWS 5043HD: 7.58V / 10.19A / 17301RPM / 14.4oz / 81.3% effy
GWS 5030HD: 7.71V / 8.10A / 18455RPM / 11.3oz / 76.1% effy

So the numbers looks sweet!!! Again, I apologize for any negative comments I said about the DM2203, and now realize I made a silly mistake and probably look stupid now. I no longer regret selling my park 250. The DM2203 ROCKS!!!

Kev

ps: I'll edit my original post...
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Old Apr 02, 2010, 02:31 PM
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Omaha Nebraska
Joined Apr 2008
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Kev,

Interesting, have you tried 3s yet with the 5043 prop.
I wound an 18T 26AWG for some one that was at high altitude that was not getting the best performance out of his motor due to thin air. Here are the numbers I got:
2735Kv, 10.50V, 430g thrust (15.16 oz) 81mph pitch speed and 12.1 amps.

I was going to try 17T because I wound one 15T and was too much for the 5043 on 3s. 2s for the 15T I got (3284Kv) 7.64V, 17400 rpm 70.85mph, 317g (11.18 oz) thrust. I think my scale is reading below the actual compared to yours and Dr Kiwi's numbers when it come to smaller motors. Looks like 17T is the limit as my results for 15T are just more amps.

Ken
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Old Apr 03, 2010, 10:56 PM
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Carmichael, CA
Joined Feb 2007
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Ken, that's cool you do "altitude corrections". I guess that's hand in hand with the prop limitations on these planes; unless you have those guys cut down bigger props or something they probably don't wanna do. I'm content with my F-15 setup for now. Just like all planes, sooner or later it'll bite the dust, or maybe I'll have another small project before then; I will probably try some 3s winds then.

Those thrust numbers are actually from Badcock. I didn't take the time to mount it on my thrust stand. FWIW, my thrust stand data shows more thrust than Badcock.net on a lot of the smaller props. I haven't actually done a 5043 on my stand yet, but I'm speculating that it's more than 14.4oz, probably more like 15-16oz. I ran it today for 10min without any problems, and vertical was still there even with an onboard camera toward the end of the pack. My F-15 AUW is 5.5oz and the camera weighs about 0.5oz, so that's no surprise. Shot out of my hand with the quickness at the beginning of the pack though.

Playing with my new "808 cam" is so fun... here's more "very unofficial video" of my 2s mini F-15:

Yardbird Mini F-15 - 808 cam onboard (10 min 0 sec)


Oh, BTW, forgot to mention that I rounded my LEs, and this is my first time flying it like that. Went cool, flies much smoother going slow now, but still seemed a bit "torqy".

Cheers,
Kev
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Last edited by Truglodite; Apr 18, 2010 at 11:51 AM.
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Old Apr 17, 2010, 08:22 PM
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Hacienda Heights, Ca., USA
Joined Sep 2009
254 Posts
I'm having a blast with my mini F-15, too much fun I stripped a servo gear on a low low pass. I'd like to get back into the air fast, can someone recommend a replacement servo that my hobby shop would carry( hitec , jr, futaba, spectrum, etc.) Thanks. Nick
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Old Apr 18, 2010, 10:57 AM
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ASB32's Avatar
United States, UT, Logan
Joined Dec 2008
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My servo picks.

Quote:
Originally Posted by Nick9000 View Post
I'm having a blast with my mini F-15, too much fun I stripped a servo gear on a low low pass. I'd like to get back into the air fast, can someone recommend a replacement servo that my hobby shop would carry( hitec , jr, futaba, spectrum, etc.) Thanks. Nick
I'm flying with Spektrum DS60J. Also the DSP60 would be great. They are kind of spendy but readily available at all my local shops so that's why I'm using them. They are also as smooth as any micro I've ever used. Also Hitec Digital HS-5045HB look good.

I'll bet that you could fly it with HS-45 or HS-55's but I've put HS-55's in a regular sized YB-22 before and really didn't like the feel. I can't speak for any ultra-micro Futaba (haven't used any) or JR (don't think there are any) servos but any 6-8 gram servo with 12-13 oz/in. will work.

BTW- I recommend using matched servos in this application. That is to say that both servos should be identical. In some applications it may not matter, but I think you will notice it in the mini if the servos are even slightly different.
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Old Apr 18, 2010, 01:30 PM
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Hacienda Heights, Ca., USA
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Thanks. Nick
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Old Apr 18, 2010, 06:58 PM
Pusher jets rule!
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Mesa, AZ
Joined Jan 2006
17,679 Posts
For these small planes, I recommend HXT500's, but I don't think you can find these in any LHS. They are available from Hobby King, and a few US based online shops.

Pat
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Old Jan 29, 2011, 03:20 PM
Registered User
Hacienda Heights, Ca., USA
Joined Sep 2009
254 Posts
I broke another servo gear, possibly from hanger rash. I'm done with the Yardbird servos, I think I will install a pair of Futaba 3114 servos. I'm using them in a Pluma and am very happy with the performance. This plane still rocks!!! Nick.
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Old Apr 07, 2013, 03:10 PM
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USA, LA, Sorrento
Joined Jul 2007
169 Posts
Are these still around looks like no action here are they 6mm or 3mm depron
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Old Apr 07, 2013, 03:15 PM
Pusher jets rule!
crxmanpat's Avatar
Mesa, AZ
Joined Jan 2006
17,679 Posts
Looks like Yardbird does still sell the Mini's. They have an F-15, F-22 and an Su-30 listed on their site (www.yardbirdrc.com). I also sell some mini pushers on my site as well (check my blog).

Pat
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Old Apr 13, 2013, 08:18 PM
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Seattle, USA
Joined Oct 2009
898 Posts
M1, the picture in this post looks like 6mm.
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