My PT-19 project can be moved forward, but much will need to wait for the receiver. The motor arrived today from HeadsUPRC, the ESC is in the mail from Hobbypartz.
Thursday, March 10, 2011
Bad Spektrum Receiver, Bad boy!
The Spektrum AR6110 receiver I purchased on eBay from ValueRC arrived a couple of days ago, and today I tried setting up my servos with it. It failed... but ValueRC has agreed to swap it out, no questions asked! Thanks, ValueRC! Heres the vid of the test showing the failure.
Wednesday, March 9, 2011
PT-19 Unboxed!
Yay! Another plane I am afraid to fly...
My E-flite PT-19 Cornell from Horizon Hobby arrived today! I unboxed it and and some of the parts I also received. I am still waiting for the motor and ESC to arrive, but I will probably start the build tomorrow. I can't wait to fly her! (If things go well with the Cubby, then the Alpha 450, this will be the next one I fly. still afraid of the Stearman since the Phoenix Flight Sim version is a twitchy brick... People who fly the real model, and what I can see in vids, say this isn't the case. but me afraid because she so pretty...).
My E-flite PT-19 Cornell from Horizon Hobby arrived today! I unboxed it and and some of the parts I also received. I am still waiting for the motor and ESC to arrive, but I will probably start the build tomorrow. I can't wait to fly her! (If things go well with the Cubby, then the Alpha 450, this will be the next one I fly. still afraid of the Stearman since the Phoenix Flight Sim version is a twitchy brick... People who fly the real model, and what I can see in vids, say this isn't the case. but me afraid because she so pretty...).
The receiver is going to be a Spektrum AR6110 (I have a Y-harness), the ESC an Exceed Volcano 40A with 3A BEC, Tower Pro SG-90 servo's (maybe EXI D213Fs, I haven't decided...), and the motor from HeadsUpRC is a 2836-09 900 kv 200W brushless outrunner, on which will spin a 10x8E prop. Everyone speaks well of the SG-90s, but the EXI servos are digital metal gear, and the TP SG90's are reliable, well known and widely used analog servo. I just haven't used the SG90's but I have a bunch of them. I think they are at least as good as, if not identical to the E-flite stock ones on my Stearman.
Chipping away
The weather improved, but I wasn't able to get out to a field, so I hovered in the garage. The EXI is still having blade tracking problems, but the CCPM and cage are set up sweet; I have never figured this one out and have wondered if its something in the blades themselves. Well, don't you know, I get to find out... In hovering, I brought her down near the trash can, she bounced and just winged the can, but this chipped the ends of the blades enough to delaminate them. And I had just been wondering how I have had this heli for months and she still had her original blades!
I hope the tracking issue is gone with the new blades. It was off about 0.5 cm at mid throttle, even with a nicely tuned CCPM. The feathering shaft is straight and the pitch is right on. We'll see if these new blades resolve the issue. I plan to fly a few packs tomorrow! The weather looks good! I am excited to get her out.
Frankenheli
I am wondering if Frankenheli should get the 4 blade rotor head? The larger rotor disk will stabilize her more being that I won't have a FBL system in, though I have been toying with the idea of getting a BeastX for her. It would be one way to get a stabilized flybarless heli without buying a two blade FBL head. Hmmm...
Gyros!
I am excited that Hobby King has shipped my GA-250 mini-MEMS gyros. These little pretties are getting good press as a $10 MEMS gyro, a relabel of an Assan gyro. Yup, $10! I had mine backordered, and they are already NIS! I need to think about getting a few of these little puppies! BUT WAIT! Looky at what I found when I went to get the link for the GA-250s! HK has another MEMS gyro, a programmable one, for $70! The Turnigy mini-MEMS with programming box. Very nice... Must consider... I had purchased another Detrum GY48V, an inexpensive piezo, but of course the moment I ordered it I got the email telling me HK was shipping by backordered MEMS. A guy on Helifreak crashed his Blade 400, and being on some tough times he was upset about the crash and not being able to fix it. While he wasn't seeking sympathy, the HF's banded together around him and he is essentially receiving a new Blade 400 in parts pieces! I am sending him what he needs for a Milton Mod (which I am trying on my 250, and my other helis as well probably), and will be including that GY48V, since I don't need it. very happy for him!
Tuesday, March 8, 2011
Sunday, March 6, 2011
WOW! What A Day! (Small things matter).
5 wonderful things happened.
1) I have been re-working my Radd's since I lost my mojo, and today, with the help of my newly stalwarted training gear I hovered out of ground effect, and in control!
2) I flew a heli and broke nothing! Several times!
3) I went through all five of my 3S 2200 mAh packs!
4) I parallel charged 4 of them at 2C and nothing exciting happened! (But the fans were sprinting on the PSU...)
5) I never talked back to the little voice in my head that kept me honest, cautious, and my heli unbent!
Today was a GREAT DAY!
Making stronger what is wimpy...
And I don't mean me, which could use some de-wimpyfying...
I have been doing the Radd's School of Rotary Flight Curriculum, and have been skittering around. It was a bit difficult because the wires on my training gear were too thin to bear the weight of my 450, so it was either thumping around or coming into hover. So today I went out to Home Depot, bought some dowel, and connected them to the wire rods using shrink wrap (yellow), and a piece of dense closed cell foam in the center to keep a bit of flex in it and to act as a shock absorber. It looks good and it works great! It supported the 450 so well it skittered like a June bug all over the garage, where before it would simply lean over threatening to kill itself with a blade strike if any aileron or elevator command went its way.
I have been doing the Radd's School of Rotary Flight Curriculum, and have been skittering around. It was a bit difficult because the wires on my training gear were too thin to bear the weight of my 450, so it was either thumping around or coming into hover. So today I went out to Home Depot, bought some dowel, and connected them to the wire rods using shrink wrap (yellow), and a piece of dense closed cell foam in the center to keep a bit of flex in it and to act as a shock absorber. It looks good and it works great! It supported the 450 so well it skittered like a June bug all over the garage, where before it would simply lean over threatening to kill itself with a blade strike if any aileron or elevator command went its way.
Wimpy wires, mighty dowels, brought together by yellow shrink wrap.
One piece all the way across, the other divided.
Closed cell foam Gooped onto the center plastic connector and to the long dowel.
Flattened by the heli, it flexes well when lift is applied at all. Allows for a great skitter as required to complete Radd's.
E-flite PT-19 Cornell
I have loved this plane since I was a kid. I was one of those who flew the original Cox U-control (line control) 0.049 version of the PT-19 Cornell. It's a classic, and this E-flite version of the PT-19 is on sale for $69 at Horizon Hobby! Here's a pic from xplaneguy on rcdiscuss. The larger is the new E-flite PT 19, and the little guy is the old Cox version. Great pics!
Here's a very nice reveiw on RCDiscuss by Micheal Heer.
The E-flite when it was first on the Horizon website had an optional set of landing gear that was more scale. I am trying to find those. Nice addition beside my PT-17 Stearman.
UPDATE: I was mistaken regarding the landing gear... They are available on the CMP PT-19 sold by nitroplanes. Its a nice looking model, but the drawn on detail makes it a bit cartoonish. I like the look of th E-flite model better, to say nothing of the price! Those optional struts are very overpriced at $55, one hopes for a pair.
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