|May 22, 2011, 08:29 PM|
My First Build - UMX-Inspired Yak-55M
It's time for my first build: a UMX-inspired Yak-55M. The plane (with wood parts for control rods and carbon bracing) was furnished by forum member cpdude (thank you!).
Here are some pics of the parts as they arrived:
DSCF7877 by bryanewyatt, on Flickr
DSCF7881 by bryanewyatt, on Flickr
DSCF7878 by bryanewyatt, on Flickr
(I poked out some of the holes here)
DSCF7880 by bryanewyatt, on Flickr
I'm going to have LOTS of questions, as I've never assembled a plane from scratch before.
Wish me luck!
|May 22, 2011, 09:52 PM|
More pics from the build-up tonight...
I did the beveling with sandpaper. What do you guys think?
Build-up 005 by bryanewyatt, on Flickr
Build-up 004 by bryanewyatt, on Flickr
Here's the horizontal fuse mocked with the upper fuse. No CA used at this point:
Build-up 002 by bryanewyatt, on Flickr
All fuse components fully assembled:
Build-up 006 by bryanewyatt, on Flickr
Build-up 008 by bryanewyatt, on Flickr
|May 22, 2011, 11:44 PM|
Last pics for tonight.
Got the control surfaces installed:
Build-up 010 by bryanewyatt, on Flickr
Mocked it up one more time:
Build-up 011 by bryanewyatt, on Flickr
Took a shot of the 4-Site that will be giving up its servos and motor (and perhaps its carbon rods):
Build-up 009 by bryanewyatt, on Flickr
I then decided to tackle covering the horizontal surfaces. I stretched out a sheet of the covering material, then dusted 3M Super 77 on the upper surface and then laid it across the sheet and flattened it. Once it dried for a few minutes, I cut the plane out and made slits where the control surfaces were supposed to move.
I must have removed it a little more quickly than I should have and noticed that the left aileron's covering was loose. Stupidly, I sprayed the Super77 up close. It frothed on the foam...and began dissolving it!
Build-up 013 by bryanewyatt, on Flickr
Build-up 014 by bryanewyatt, on Flickr
To try to fix this, I cut a triangle of 3mm depron in half (making it 1.5mm or so thick and CA'ed it over the low area):
Build-up 017 by bryanewyatt, on Flickr
That's all for tonight!
|May 23, 2011, 06:42 AM|
This morning, I went back and beveled the ailerons to get more travel.
First question today: When I go to put the fuse together, do I cover the two sections separately and then attach them to the horizontal fuse?
Second question: Do I attach and cover the rudder before or after I attach the fuse?
|May 23, 2011, 07:15 PM|
United States, SC, Spartanburg
Joined Feb 2011
hi there, i love this!! i have the guts out of the micro su-29. i sat down with some 3 veiw drawings of the yak 55m and tried to resize them down to this size but it just didn't come out right. is there anyway i could get the drawings of what u have done here?? or can u help me out on that?? i know the su-29 had only 1 servo for the ailron and the 4-site had two but i'm sure using all the hardware i could get one to work. i'm very interested in this!!! i am a yak 55m lover!!! i love the way it flys!!!
|May 23, 2011, 11:48 PM|
Vertical surfaces tacked and curing on covering:
Build-up 018 by bryanewyatt, on Flickr
Lower fuse covered:
Build-up 019 by bryanewyatt, on Flickr
Covered upper fuse attached with thin CA:
Build-up 020 by bryanewyatt, on Flickr
First pic with lower fuse attached:
Build-up 021 by bryanewyatt, on Flickr
Unlike the horizontal control surfaces, which were covered and hinged in one step, the rudder was covered separately. Therefore, I used hinge tape (Blenderm) only:
Build-up 024 by bryanewyatt, on Flickr
Unfortunately, I didn't do as good a job with the horizontal surfaces as I did with the vertical ones
Build-up 027 by bryanewyatt, on Flickr
Close-up of the other side of the rudder:
Build-up 029 by bryanewyatt, on Flickr
The hole where the AR6400 will be sitting is in center of this pic. Not sure where I'm going to put the aileron servos, though...
Build-up 031 by bryanewyatt, on Flickr
Build-up 033 by bryanewyatt, on Flickr
Further away (and yes, I'm sitting between my furnace and the washer/dryer):
Build-up 032 by bryanewyatt, on Flickr
Installed the fences for wing bracing:
Build-up 035 by bryanewyatt, on Flickr
All ready for bracing, servos, and powertrain
Build-up 037 by bryanewyatt, on Flickr
|May 25, 2011, 09:27 PM|
Did a little bit of work today...
This was a mostly-intact 4-Site...until today!
Build-up 041 by bryanewyatt, on Flickr
Before that, I cut the electronics out of the plane...
Build-up 043 by bryanewyatt, on Flickr
...and salvaged as many of the CF rods from it as I could (sadly, the stack of 4 thin rods in the middle is the remains of the two rods cross-bracing the wing; the complete set is on the right)
Build-up 044 by bryanewyatt, on Flickr
Test-fitting the receiver:
Build-up 045 by bryanewyatt, on Flickr
Aileron servos and the first braces fitted (the right aileron pushrod actually goes at a slight angle to the control horn because the aileron servos are identical and not mirrored):
Build-up 047 by bryanewyatt, on Flickr
Also fitted a couple braces at the tail. I hope I'm not adding too much bracing...I'm just using what I have available!
Build-up 049 by bryanewyatt, on Flickr
Couldn't resist the urge to add another brace. The last one will likely be the other pair going to the main wing.
Build-up 050 by bryanewyatt, on Flickr
|May 25, 2011, 10:34 PM|
Wow...thank you! That means a lot!
I was meaning to ask because I've never really worked with something this small, but what kind of throws should I expect? Should I also dial the expo up quite a bit?
|May 25, 2011, 10:45 PM|
United States, CA, Cameron Park
Joined Jan 2004
I may not be a good role model here! j/k!!
I usually go for the largest throws I can get mechanically then dial in a bunch of expo (40-50%). I'm also not a big fan of dual rates.
|May 25, 2011, 10:51 PM|
I'm a little worried about the right aileron, what with the pushrod running at a little angle. Does it look OK? I'm kind of impressed that I managed to eyeball that fitting!
|May 25, 2011, 11:12 PM|
Rookie build mistake, eh?
I'm going to try coloring with a Sharpie before I mount the receiver. I also need to lengthen the rods for the rudder and elevator. I think for this one, I'm going to leave the landing gear off. I've already added too much weight!
|May 26, 2011, 09:41 PM|
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