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Old 05-10-2011, 05:10 AM   #1
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Default E flite Pitts Model 12 battery hatch

I lost my battery hatch for my Eflite Pitts Model 12 15e. If anyone has an extra, in good shape, due to any reason I would like to purchase. Thanks.
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Old 06-08-2011, 06:18 AM   #2
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I guess i will give up on this and just make my own or buy a new fuse to get the hatch.
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Old 06-08-2011, 08:46 AM   #3
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Default Maybe

Hold the bus there HTH,

My fuselage is damaged but how bad..., I've been afraid to look.
I'll check it out later today & get back to you. My hatch never did fit right as it were anyways, did yours?
BTW, they don't cartwheel worth a darn either

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Old 06-08-2011, 06:02 PM   #4
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I'd give you mine, but it was slightly damaged on the last flight


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Old 06-08-2011, 06:42 PM   #5
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At least mine still looked like it'd fly when I picked it up. All I saw was that the motor mount was broke. 2 days later when I took the cowl off is when I noticed the wrinkled covering on the lower starboard side wing so I put the cowl back on & hung it up. It was another couple of weeks before I noticed the wing saddle on the port side wasn't right at all
I should be finished up in a couple of hours outside & then I'll take a better look at it.

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Old 06-08-2011, 06:53 PM   #6
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Let's just say "Power 25, nylon geared aileron servos, and consectutive snap rolls" don't go well in the sama paragraph.

Miss it - but actually enjoy flying it's replacement (E-Flite PT-17) as much

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Old 06-08-2011, 08:09 PM   #7
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I'm just about to pull the M-12 apart to see just how much damage there is in there. I bought it cheap enough that I might think about buying another fuselage. If not I also have the E-Flite PT-19 & the E-Flite Rhapsody 25e Bipe in waiting their turn on the table. The owner at the LHS where I got a heck of a deal on the Rhapsody Bipe said that the Power 32 was the way to go with it. Sounds sorta like your set-up. However before they come up I have my Hyperion Samson 70e Bipe to finish putting back together

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Old 06-08-2011, 08:48 PM   #8
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Originally Posted by Old Fart View Post
I'd give you mine, but it was slightly damaged on the last flight
A touch of CA and she'll be as good as new

But seriously.. sorry about your crash. These laser cut ply models sure do break in a big way when you pile them in.

Steve
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Old 06-08-2011, 08:54 PM   #9
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Wasn't one of my better days. Both lipos (parallel) ignited on impact. Rescued the motor, esc and all but 1 of the servos though. Annoying as I'd gone the extra step of all ball end linkage, flying wires, etc.

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Old 06-08-2011, 09:03 PM   #10
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Here's a Pitts I destroyed earlier... This is the Hobbyking version, not as nice as the E-flite model I was still sick when I totalled it (a few weeks back).. The LiPo bought it in this crash too.

nothing to blame but pilot error


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Old 06-08-2011, 09:12 PM   #11
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Ouch

Hey - at least we aren't slackers in the "wrecked the plane today" category

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Old 06-09-2011, 12:01 AM   #12
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Originally Posted by Hernthehunter View Post
I guess i will give up on this and just make my own or buy a new fuse to get the hatch.

HTH,

I finally got to take a look at the damage to mine & I wish I'd of done it a month ago as the damage isn't bad at all. In fact I'm surprised as all get out that there's no more damage than there is. I can have it ready to fly again in one afternoon with time to go fly it the same evening if I don't get side-tracked
Sorry I can't help ya out but maybe someone will spot this thread that can help, hope so anyway. Good Luck!

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Old 06-09-2011, 12:09 AM   #13
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Originally Posted by JetPlaneFlyer View Post
Here's a Pitts I destroyed earlier... This is the Hobbyking version, not as nice as the E-flite model I was still sick when I totalled it (a few weeks back).. The LiPo bought it in this crash too.

nothing to blame but pilot error
How did it fly? I also read that there were several issues with the kit, is that so? I've been waiting for it to be restocked now for about 5 months.

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Old 06-09-2011, 12:20 AM   #14
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Originally Posted by Old Fart View Post
Ouch

Hey - at least we aren't slackers in the "wrecked the plane today" category
Is that really a good thing

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Old 06-09-2011, 07:09 AM   #15
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Originally Posted by Slowjohn View Post
How did it fly? I also read that there were several issues with the kit, is that so? I've been waiting for it to be restocked now for about 5 months.

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Yeah, there are a number of 'issues'.. The annoying thing with mine is after quite a bit of work I'd sorted them all out and it was flying really well.

The problems i found (which seem to be 'standard' problems) were:
  • Aileron linkage rod needs to be re-engineered to attach at the TE. The method shown in the manual just doesn't work.
  • Cabane strut mounts at the fuselage are very weak and require beefing up
  • Lower wing rear mount (one screw through unsupported 1/2" wide balsa TE) is inadequate and needs beefing up.
  • Alloy landing gear is weak and bendy but beware replacing with carbon gear because the fuselage mounting plate is also weak and will rip out if stiffer landing gear legs are used (i changed the legs and re-engineered the mount)
  • Plane is very tail heavy and to avoid nose weight needs the battery to go all the way to the nose, which requires some re-engineering.
  • Canopy magnet retention is truly pathetic and must be fixed. I installed a slide type latch.
  • It goes much better with quite a bit of right thrust and a bit of down which needs to be done with shims/washers because the motor mount doesn't have any built in offset.
With these things fixed it's a really nice model and goes great. Don't expect great 3D performance though, it's not really light enough for that, but for normal aerobatics including, with the right powertrain, unlimited vertical performance, its great.

Steve

PS.. I have some photos of the mods i made if you are interested.
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Old 06-09-2011, 11:05 AM   #16
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If HTH doesn't mind I'd like to see what you'd done to it. Sounds like this E-Flite M-12 15e & that HK Pitts were made by the same company as my M-12 Pitts has most of those same issues. Where did your HK Pitts CG wind up at?

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Old 06-09-2011, 06:57 PM   #17
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The Eflite and the Hobbyking models are pretty different once you start looking closely.

CG on mine was just behind the LE of the bottom wing, maybe 1/2" back.

There are some photos in this thread: http://www.rcgroups.com/forums/showt...yking+pitts+12
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Old 06-10-2011, 07:01 PM   #18
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Thanks for that info!!!!!!!!
I guess that I had my CG within the Ball Park but I had to add 2+ ounces of weight to the tail to get it there
I didn't use any "Monster" motor on it & in fact I felt it was under-powered by a bunch. I even "flew" it to a large area of 3' tall grass to put it down in. Of course I found the only bare spot in that half acre to land it
The Wheel Pant did catch some of the tall grass which caused the Cart-wheeling but the damage wasn't as bad as I'd first thought
Funny how that seems to be the case so much of the time if they don't become confetti or packing peanuts upon impact

Okay, after reading what I wrote above, the motor I used would probably have been correct or at least okay if I hadn't of had to add 2+ ounces to the tail. I'll look up that motor & get the specs for it.
Any thoughts?

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Old 06-10-2011, 07:14 PM   #19
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What motor, battery and prop were you using.. and what was the all up weight?

Mine was ballistic with the Scorpion SII2030 1110kv spinning a 12x7.. Well ballistic in the vertical, top speed in level flight was good but it wasn't a racer.

Steve
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Old 06-10-2011, 07:28 PM   #20
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John, did you get a chance to do an inflight CG test?

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Old 06-10-2011, 09:20 PM   #21
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Originally Posted by Old Fart View Post
John, did you get a chance to do an inflight CG test?
Yeah.. I adjusted the CG to the point where it would fly inverted with no down elevator, and in the vertical it wound go straight up without pulling toward the belly or canopy.

Steve
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Old 06-10-2011, 10:26 PM   #22
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Default OOPS!!!

Okay. here's what I've determined.
It weighed in at 59 ounces or so. The motor I used http://www.headsuprc.com/servlet/the...lectric/Detail with an 11 X 5.5 prop & an older 3s1p 2700 mAh 25C was only rated at 53 ozs. of thrust with a new lipo.
The lipo I used wasn't puffed, hadn't been used much nor abused but it is about 3 years old . That heavy Gal Pilot I put in there will have to go but she looked so pretty sitting in that cockpit I almost named her Chellie
Chellie if you see this that was meant to be a compliment

I didn't get to do any type of flight testing as that was the maiden flight and as soon as it left the runway I had my hands Plumb Full!!! I was able to bring it around "Short Field", about 3/4 short circuit to that deep grass to try & put it down softly but like I said I found the only dirt in that half acre & had to watch it Cart Wheel

I'm not up to doing much right now as I'm still battling some demons but I am getting better. 7 years on Morphine based meds plus some other RX's from Pain Management docs is Pure Hell going Cold Turkey to get off them. Wish I could've taken those docs with me on that trip to Hades. I do have to say this though, It was my decision to get off the drugs so that I can determine just where my pain level is w/o the drugs. Then I'll decide what's best. My desire was to get clean & go back to work if at all possible. Whether that happens or not remains to be seen.

Sunday morning I have a reservation with a couple of 9 year old boys & my 6 year old Grandson to take them all flying If I survive that I can survive anything!!!!!!!!!!!!!!!

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Old 06-10-2011, 10:57 PM   #23
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Hmm.. I'm surprised the efite model wasn't lighter than my Hobbyking version. Mine was about the same weight, maybe a couple of oz lighter. The Scorpion motor gave 750W on a fresh battery and generated nearly 90oz of thrust.. which explains the vertical performance

Hope you get on top of your health issues ASAP..

Steve
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Old 06-10-2011, 11:33 PM   #24
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Originally Posted by JetPlaneFlyer View Post
Hmm.. I'm surprised the efite model wasn't lighter than my Hobbyking version. Mine was about the same weight, maybe a couple of oz lighter. The Scorpion motor gave 750W on a fresh battery and generated nearly 90oz of thrust.. which explains the vertical performance

Hope you get on top of your health issues ASAP..

Steve
Thanks allot Steve,
It's worse than any tooth ache I can remember but I will see it thru!!!

When my Pitts came off the runway it was tail heavy big time IMO from the way it flew, short as the flight was. I made double triple sure that I had the CG on the forward end of the suggested range hoping to have it tame enough to fly easily the first couple of flights but...
I'll get it back together soon and try it again with a different power system & the Gal Pilot will just have to sit it out
BTW, did you have to add any weight anywhere to get the CG right?

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Old 06-11-2011, 08:52 AM   #25
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Originally Posted by Slowjohn View Post
BTW, did you have to add any weight anywhere to get the CG right?
Many have reported that they did have to add noseweight to the Hobbyking model to get a good CG.. I didn't need any weight because i made a sliding battery tray so that the battery could go all the way forward into the cowl. You can see the battery position on some of the photos in the other thread.
I suspect the tailfeathers are rather heavy on the HK model, which leads to a tendency for tailheaviness.

Steve
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