Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin  |  Contact Global Moderator
March 28, 2017, 03:42:59 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with email, password and session length
 
Home Help Search Login Register
Pages: 1 [2]   Go Down
Print
Author Topic: Peck-Polymers Andreason BA-4B Build  (Read 2260 times)
0 Members and 1 Guest are viewing this topic.
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #25 on: February 20, 2017, 04:22:02 AM »

New struts are made and installed (almost as though it's always been that way; no-one need ever know about the Strut Incident), and the model is now all in one piece; it's not completely finished (needs a few details), but it is flight-ready. The prop has been trimmed to 5.35" diameter which I'm hoping will allow take-offs, and some basic test-glides have revealed a requirement for a bit of nose weight. I put it on the scales this morning and <sharp intake of breath> it weighs 14 grams without rubber! I don't think it'll be troubling the top of the timesheets Smiley . However, I don't really mind that - it's the first Peanut I've built for a long time.

I'm not certain where extra weight has come from; the noseblock assembly is about 3.2 grams which for a peanut is probably a bit hefty (3/64" wire, dictated by the size of the hole in the propeller, I guess), and looking back on the build thread I think the wood was probably a bit heavy (although light stuff was used for the tail surfaces). I suspect that most of the weight went on when the cowling parts were added, and when the undercarriage was installed; maybe there was a bit too much epoxy, and maybe it could have used smaller diameter wire?

I'm going to take Jon's advice and try it outside before the next indoor session (which will be mid-March). And if I can find someone to do the honours, I'll see if I can get a flight video.
Attached files Thumbnail(s):
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Logged
ZK-AUD
Gold Member
*****

Kudos: 15
Offline Offline

New Zealand New Zealand

Posts: 453



Ignore
« Reply #26 on: February 20, 2017, 04:54:38 AM »

Very nice indeed. Neatly executed!   If you wanted you could run a bead of slightly thinned RC56 Canopy glue along those strut fairings onto the tissue.  It dries nice and clear, and being latex based it won't pull the tissue and you'll get a bit more strength.  Tempted to build one of these myself.
Logged
OZPAF
Titanium Member
*******

Kudos: 36
Offline Offline

Australia Australia

Posts: 3,183



Ignore
« Reply #27 on: February 20, 2017, 06:15:06 PM »

Great effort - good luck with it's trim flights

John
Logged
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #28 on: February 22, 2017, 09:48:45 AM »

Thanks, guys  Smiley

I've now added the final bits of detail (fuel tank filler, windscreen and a facsimile of an instrument panel) so it's officially finished - see pictures.

The instrument panel was made by scanning the (black) instrument panel and altering it in paint shop pro until it looked closer to the real one (aluminium panel with black instruments).

I might add a few more minor details if it survives to the Nationals, but basically I think that's it.

If I was building another, what would I do differently? Not a lot:
  • Take a bit more care over wood selection; I don't think the leading edges or longerons need to be that hard.
  • Add 1/16" sq supports to the top wing and an extra rib to the bottom wing for the interplane struts.
  • Move the rear motor peg further forward a bit because it doesn't quite fit my winding stooge.
  • Make a new F4 rather than trying to make the existing one fit.
  • Maybe use slightly thinner U/C wire.
  • For me, dope and thinners works better than a glue stick for attaching tissue.
  • Use small pegs/bits of wire as locators for wings & strut ends.

I've added .png files for the instrument panel and lettering in case they might be useful to someone...
Attached files Thumbnail(s):
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Logged
FLYACE1946
Platinum Member
******

Kudos: 16
Offline Offline

United States United States

Posts: 1,276




Ignore
« Reply #29 on: February 22, 2017, 11:02:05 AM »

abl you are really on to something nicely done.
Logged
MKelly
Gold Member
*****

Kudos: 15
Offline Offline

United States United States

Posts: 260




Ignore
« Reply #30 on: February 22, 2017, 03:16:10 PM »

Very nice!
Logged
Jack Plane
Gold Member
*****

Kudos: 7
Offline Offline

United Kingdom United Kingdom

Posts: 366




Ignore
« Reply #31 on: February 24, 2017, 10:46:32 AM »

Looks very good!

I was a bit worried that the Good Woman was going to keep insisting that we have a Spring break in direct conflict with the Indoor Nats weekend  Angry but I've managed to scheme a cunning plan that gets us back by Friday evening!

Only problem now is that I've got to now make a start on my identical Peanut BA-4B  Shocked or Andy will never let me hear the end of it...!
Logged
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #32 on: February 24, 2017, 03:21:23 PM »

Looks very good!

Thanks very much! :-)

Only problem now is that I've got to now make a start on my identical Peanut BA-4B  Shocked or Andy will never let me hear the end of it...!

I have a loft-full of part-completed projects, and it's just taken me about a year to finish a PSS project that was first started back in about 2007 (!) - I'm in no position to make any sort of cutting remark about people not getting on with things!  Smiley

Andy
Logged
Mark Braunlich
Gold Member
*****

Kudos: 48
Offline Offline

United States United States

Posts: 881




Ignore
« Reply #33 on: March 16, 2017, 04:47:48 PM »

from the files
Attached files Thumbnail(s):
Re: Peck-Polymers Andreason BA-4B Build
Re: Peck-Polymers Andreason BA-4B Build
Logged

Mark
Jack Plane
Gold Member
*****

Kudos: 7
Offline Offline

United Kingdom United Kingdom

Posts: 366




Ignore
« Reply #34 on: March 17, 2017, 10:38:13 AM »

Thanks for putting these up Mark

Jon
Logged
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #35 on: March 19, 2017, 10:33:07 AM »

Here's a slightly stally (and short) Andreasson test flight from yesterday (Saturday):

https://vimeo.com/209076618 - many thanks to Jack Plane for the video.

That was 450 turns on an 11.5" loop of 3/32"; tried it later on 750 turns and it definitely needs more down thrust and possibly a little bit more right thrust, so I'll re-set the prop-shaft angle for next time out.

It needed just over 2 grams of nose weight, so I regret to report that it now weighs 16.16 grams without rubber. And I can state with confidence that taking the trouble to move the rear motor peg forwards and then leaving it about 3mm in front of the stabilizer leading edge was a bad idea, as it's very difficult to get fingers on the peg; should really have moved it forwards an entire bay, hopefully saving a bit of nose weight in the process.

I have a feeling that it might benefit from slightly wider rubber (maybe 7/64"), but over-powering indoor models is one of my bad habits so we'll see what it's like on max turns (1200-ish). Also, I have an idea that a better propeller might be worth trying. Might even think about carving one (I have old knife cuts on every finger of my left hand and some fingers of my right hand from carving propellers...).
« Last Edit: March 19, 2017, 10:45:46 AM by abl » Logged
OZPAF
Titanium Member
*******

Kudos: 36
Offline Offline

Australia Australia

Posts: 3,183



Ignore
« Reply #36 on: March 19, 2017, 06:21:00 PM »

The landing looked great! I think you have a potentially nice flying model there.

John
Logged
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #37 on: March 21, 2017, 07:46:47 AM »

Thanks - I think/hope you might be right; it has that "planted" feel to it (unlike the other model that I was attempting to trim at the same time).
Logged
Crabby
Platinum Member
******

Kudos: 56
Offline Offline

United States United States

Posts: 1,223


I never met a modeler I didn't like



Ignore
« Reply #38 on: March 25, 2017, 08:53:53 AM »

ABL great job on a great Peck classic!...This plane has long been a favorite and it has never let me down by flying erratically, or doing silly things whilst people are watching. My Dad, Thee Olde Man, (RIP) always yearned to build one that was lighter than the previous, he built several and I have his latest (in red) which weighs 9 gr. with rubber. Mine (the blue, cruder lazy man's version without the torsion struts) weighs 11 gr without rubber. I have built two, this one was part of a 24 hr. challenge build over on SFA. I was so balsa-sick after the build, I finger wound it and literally threw it out the front door into the early am darkness, and collapsed on the couch. When the sun rose I went out and found it a block away in a neighbors tree. I have cranked out some very tranquil flights with this ugly sister, and she is soo tough, having been tangled in an olde ladies' purple hair once and in the moving spokes on a kids bike once. "There but for the grace....."
Attached files Thumbnail(s):
Re: Peck-Polymers Andreason BA-4B Build
Logged

The Threadkiller!
FLYACE1946
Platinum Member
******

Kudos: 16
Offline Offline

United States United States

Posts: 1,276




Ignore
« Reply #39 on: March 25, 2017, 10:47:02 AM »

Crabby the story you related reminded me of my first PP Andreason Build. I had made so many repairs that I resorted to using 30 min epoxy to hold the landing gear in. It was the best flight that resulted in my losing the nose block on the long walk back thru the tall grass /WEEDS near San Antonio. I have since built several more and always want to have one ready. Amazing little flyer I always say.
Logged
abl
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 33

Topic starter


Ignore
« Reply #40 on: March 26, 2017, 04:36:35 PM »

... My Dad, Thee Olde Man, (RIP) always yearned to build one that was lighter than the previous, he built several and I have his latest (in red) which weighs 9 gr. with rubber. Mine (the blue, cruder lazy man's version without the torsion struts) weighs 11 gr without rubber...

 Shocked

So, your Dad's weighs just over half what mine does, and yours weighs about a gram less than what I was hoping for...? Wow. Smiley

Can I ask how you've done that? Is it just wood selection, or did you modify the structure? I used the wood in the kit and - coming back to peanuts after so many years - I really haven't got much of a feel for how light/heavy stuff like leading edges, spars and longerons need to be...
Logged
Crabby
Platinum Member
******

Kudos: 56
Offline Offline

United States United States

Posts: 1,223


I never met a modeler I didn't like



Ignore
« Reply #41 on: March 26, 2017, 05:32:50 PM »

My Dad did whack stuff like sanding the tissue. Go from there and do nutty things like that. Also get a balsa stripper and a mic. Have a scale, and weigh everything. I am inspecting his BA-4 to look for clues.
Logged

The Threadkiller!
Pages: 1 [2]   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!