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Old Oct 15, 2012, 05:32 PM
What's 3D?
trumps's Avatar
Australia, WA, Ellenbrook
Joined Feb 2008
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@ IoNsIo
it looked more like a slight pin compression mark in the first layer of the lamination to me, this often happens when pins are used for forming the part and really is not an issue from my experience, these laminated areas are amazingly robust for their size and weight!

Craig
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Old Oct 15, 2012, 05:49 PM
wood is good
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United States, CA, Marina Del Rey
Joined Jun 2012
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Quote:
Originally Posted by trumps View Post
@ IoNsIo
it looked more like a slight pin compression mark in the first layer of the lamination to me, this often happens when pins are used for forming the part and really is not an issue from my experience, these laminated areas are amazingly robust for their size and weight!

Craig
"Pin compression mark" right where a thin strip makes a sharp angle? Sorry but it is what it is: a fracture.
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Old Oct 15, 2012, 05:55 PM
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Norfolk, England
Joined Sep 2001
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IoNslo,
Only lighthearted comments, I assure you, that's why I put the 'seriously though' before making a real remark.
As I said, I was sure you didn't intend your remarks to be critical, but that is how they read, in both instances. That's the one problem with this media, words come across, but not the way in which they are intended.
I don't think your comment about the fracture was dismissed out of hand, just that there is more than one perspective on how much of a problem it was likely to cause. Had it been on a tailplne leading edge then I would agree with you, it definitely could be an issue, but not where it is.
As for the suggestion of a section on the plan, if I can fit one, I will add it. It's obviously something that needs it.
Just to explain my earlier comments, and how the inadequacy of the media can lead to crossed wires, while you meant it should be on there somewhere, it read as an instruction to put it on there.

Pete
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Old Oct 15, 2012, 07:53 PM
Da' Cajun
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Lake Charles, Louisiana
Joined Jun 2009
2,864 Posts
I say lets duke it out.


IoNslo, I didn't dismiss your comments and did in fact take a look at the rudder this morning. It is very firm, the wood was just compressed by a pin. I drop of CA is all it needs.
If this piece fails it will be because it met the motor coming back the other way after running low on altitude.

Didn't get a chance to do to much today on the 22.
Worked on a couple jets and did some battery butchering.

Will try to finish up that wing panel tomorrow.



Julian
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Old Oct 16, 2012, 02:23 AM
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Norfolk, England
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That's okay mate, you are allowed the odd day off. Next one should be due sometime after Xmas.

Pete
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Old Oct 19, 2012, 07:28 PM
Registered User
Norfolk, England
Joined Sep 2001
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Focus is slipping again mate.
How you mount your servos is up to you. As long as you show what you changed, and make mention of it in the write-up. As far as I'm concerned, it just shows options.

Pete
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Old Nov 28, 2012, 09:45 PM
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Moab, Utah, USA
Joined Apr 2003
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Cajun and Doll House, how go the PT-22 builds?

Larry
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Old Nov 29, 2012, 06:37 AM
Da' Cajun
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Lake Charles, Louisiana
Joined Jun 2009
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I'm back on mine.
Got the jet fly-in behind me and then started on a few repairs and mods to some planes in the hangar. Then Thanksgiving week was busy. ...too many irons in the fire.

Most of the parts in the short kit are assembled.
Really don't have enough 1/16 sheets on hand to complete the planking, waiting on an order from National Balsa to show up any minute though.
When I get far enough along I'll post some pics.
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Old Dec 18, 2012, 12:26 AM
Semper Fly
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United States, ID, Meridian
Joined Oct 2004
133 Posts
Hey all.
Finally got to check in on the PT 22 builds.
Boogie, your PT is looking good.
Kdahlhaus, I hope your not waiting on me to start your build,
I just moved into my new house so I think within a few weeks I'll be back on the PT 22 build, In the mean time I can at least watch one go together here.

With sincerest apologies to Pete
Scott

Ps Anyone from around the Boise, Meridian areas out there?
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Old Jan 11, 2013, 08:24 PM
Da' Cajun
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Lake Charles, Louisiana
Joined Jun 2009
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After many delays & distractions I'm back on the Recruit.
Finally got my balsa wood order in from National. There was almost a 2 week delay from the time I placed the order until it was shipped.
In the mean time I started on my MiG 19 scratch build and a little HET F-16. So it was easy to get sidetracked.

Anyhoo...
wrapping up the wings & fuse halves glued together. Next step is to sheet the fuse and start working on the nose. But the motor I was going to use is too big, don't know how far I can get on the cowl without it. So, when I get a close estimate of what the final weight will be I'll pick lout a new motor.

I debated whether or not to sheet the bottom center section before joining the wings. On a straight wing design it would have been a no brainer. With the swept wing, I wanted to be able to get in there and really make sure the joiner was really secure as there are spacers between the joiner and the spars. Also, will forgo using the balsa spacers (parts DH1A & DH2A) and make some more out of hardwood. The balsa ones may have sufficed but I plan on over powering this one and high G maneuvers will be the norm.
This is a tough airframe, can't wait to wring it out.


Julian
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Old Jan 11, 2013, 08:52 PM
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Albuquerque, NM USA
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Use whatever motor Pete put on the plans. He is usually very conservative so you won't have a lack of power.

charlie
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Old Jan 12, 2013, 03:59 AM
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Norfolk, England
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It would, of course, help if I could remember which motor I've shown on the plan. Just checking, and since ample power is required, a reverse mounted AXI 2820 just needs another ply doubler on top of M or, depending on how you feel about adjusting shaft length to suit your prop driver, a Turnigy 4240 goes in nicely. It may not need adjusting, but it depends on how far onto the shaft your prop driver fits. Alternatively, making the nose block a tiny bit deeper would work.

Going from the measurements, and it sounds familiar, I'd say it's a Turnigy 3536 shown. 500+ watts sounds about right for a model of this size - if you like ample power. Too much more might give ballooning problems at full throttle. I remember what my Ryan's Daughter was like with about 100 watts/lb - it would almost take off in it's own length. Fun, but a little scary at times.

Pete
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Old Jan 12, 2013, 03:35 PM
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Moab, Utah, USA
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The full size PT-22 was a trainer that probably had to dive to gain enough airspeed to loop. IMHO any more than 60 watts/lb on the model would be a waste.

Larry
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Old Jan 12, 2013, 05:53 PM
Wanted for breaking OHM's law
Dennis Sumner's Avatar
United States, MI, Canton
Joined Sep 2002
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Quote:
Originally Posted by PETERRAKE View Post
It would, of course, help if I could remember which motor I've shown on the plan. Just checking, and since ample power is required, a reverse mounted AXI 2820 just needs another ply doubler on top of M or, depending on how you feel about adjusting shaft length to suit your prop driver, a Turnigy 4240 goes in nicely. It may not need adjusting, but it depends on how far onto the shaft your prop driver fits. Alternatively, making the nose block a tiny bit deeper would work.

Going from the measurements, and it sounds familiar, I'd say it's a Turnigy 3536 shown. 500+ watts sounds about right for a model of this size - if you like ample power. Too much more might give ballooning problems at full throttle. I remember what my Ryan's Daughter was like with about 100 watts/lb - it would almost take off in it's own length. Fun, but a little scary at times.

Pete
Pete, I just had to says thanks for your Ryan's Daughter....Here's a couple of pix of mine built in 2009, still one of my favorites to take to the field.

Denny
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