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Balsa USA 1/4 Scale Nieuport 28 Build

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Old 05-08-2013, 06:43 AM
  #451
LesUyeda
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

'I used dubro 1/4 oz strips of lead which has a self adhesive strip on the back to attach it to the firewall.'

It is for testing, but the adhesive will dry out, and eventually give up. Once your are happy with what you have; like Vincent said, a fastener of some sort.

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Old 05-08-2013, 08:04 AM
  #452
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

I have a bunch of the old Sig lead weights. They have a 1/8 hole drilled through the center that is used to secure them. I usually add an extra t-nut in the firewall for adding nose weight. Unfortunately, Sig no longer makes their old lead weights. I just checked. Instead they now offer a steel stick on weight. Alas, another great product gone.

SDP. I like the way you did your tail feathers. Am I to understand they are removable? Do you plan to cover the underside of the fuselage where the tail wheel and lock nuts are fastened? Great work by the way. Now that RCU has updated their site I hope you visit more often and post more pictures.

Mike
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Old 05-09-2013, 06:26 AM
  #453
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

"Instead they now offer a steel stick on weight. Alas, another great product gone. "

Thank the infinite wisdom of the EPA. Lead is a cumulative poison, and if you ingest enough of it, you will die. Of course I will eventually die, lead or no. Moral of the story, is don't eat lead.

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Old 05-18-2013, 11:59 AM
  #454
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

Creeping along on the build....

Been busy flying and have been neglecting the build.

I have made some progress, however. I finally got all the control hard-points installed in the tail feathers and have been working on the guide tubes. The plane will get six guide tubes in total, two for each elevator half, two for the rudder pull-pull cables, and two for the tailwheel pull-pull cables. On the last three planes I have built I added an extra set of cables specifically for the tailwheel steering. This setup has worked perfect over the years and it is my preferred method. I just hate how the traditional setup with springs never seems to work as planned and feels "junky".

The tailwheel cables will get springs, but as part of the pull-pull setup.

I'll include a photo of the same setup on my 1/4 Cub.

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Old 05-19-2013, 06:41 AM
  #455
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

"I just hate how the traditional setup with springs never seems to work as planned and feels "junky". "

Feeling "junky" is exactly the reason for springs. When you have to crab into a landing, and lock the tail wheel to the ground, it can assume whatever attitude it needs to to track in the direction the plane is traveling, until things settle down.

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Old 05-19-2013, 07:35 PM
  #456
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

There are still springs in the setup to absorb the shock. But they are in line with the cables and not at some off angle direction up to the rudder. Most planes I see with springs only have terrible geometry reference the springs.

Look at the previous photo of the tailwheel setup on my Cub. Imagine the wires moved from where I have them to a straight connection between the rudder arm and the tailwheel arm. The springs would be vertical and not front to back as correct geometry would dictate.
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Old 06-13-2013, 11:40 AM
  #457
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

I usually take a "Seasonal Building Break" at the beginning of summer. For some reason as the temperature soars I loose interest in sweating away in the shop / garage. Today I resumed the Nieuport build by bringing the building table indoors and installing the elevator pushrod guide tubes. The exits were positioned in a way the pushrods line up perfectly with the control hardpoints already installed in each elevator half.

Once the epoxy / microballon mix hardens up the guides will be trimmed and sanded flat and I can move onto the tailwheel cable guides. Once those are complete I will create / install the servo tray for the two elevator servos and the one rudder servo.

The motor, a Hacker A60-5S, is on order so the planning of the motor mount / battery tray can commence.

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Old 06-14-2013, 01:11 AM
  #458
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

Looks nice SDP. Glad someone is able to fly. I've been trying to get out but the weather for weeks has prevented that from happening. I've never seen so much wind (and rain before)...

Your wife must be very understanding to allow you to bring your work table in the house.
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Old 07-05-2013, 04:27 PM
  #459
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

Weather was a little cooler today due to some local monsoon rain so I ventured into the garage to continue the build. Work has begun on the servo tray.

I was hoping to get everything a little more forwards than it is but hopefully with 8 cells in the nose this thing will balance. The empty space on the tray between the servos and the nose of the plane will get the radio battery, a 2 cell lipo, and the receiver.

I may flip the servos to the other side of the tray because they are directly below the open cockpit and would be easier to access via that side. A false floor will be just above the servo tray, in the open cockpit, for the pilot figure.

The tray will also be lightened once everything has been placed in its final position.

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Old 07-06-2013, 06:12 AM
  #460
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

SDP, everyone has remarked on your building skills and I agree.
However, your photographic skills should also be noted.
Nothing explains a point better than clear, closeup, pictures.
Thank you for taking the time.
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Old 07-06-2013, 02:30 PM
  #461
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Default RE: Balsa USA 1/4 Scale Nieuport 28 Build

Thanks Mailtape.... Photography is my other hobby so even build photos require a bit of attention. (As stated before, I'm a little OCD).
Cut some slots for the securing velcro for the receiver and the radio battery. Again, the mill makes quick easy work of this. You cant see it in the photo but there is one more slot just above the receiver.
Next I'll install the mounting blocks for the servos then the mounting blocks for the entire tray will be installed into the fuselage. My plan is to have the entire tray mount in each corner with 4-40 bolts into threaded inserts installed into the plane. Right now the tray fits perfectly between two formers and between the inner crutch walls.
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Old 08-08-2013, 02:23 PM
  #462
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Today, after a little summer break, started to install the radio / servo tray into the fuselage. I decided to make the tray removable and secure into the fuselage with four 4-40 bolts, one in each corner. The mounts are some maple (Had some laying around) with some 4-40 brass inserts installed into them.

The mounts are being installed in such a way the bolts will be accessed via the open cockpit at the rear and the wing attachment location at the front.

The rear mounts are being installed in the photo. You can see the temporary cross braces holding the mounts in position until the epoxy cures.

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Old 08-10-2013, 08:58 AM
  #463
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This morning I mounted the servos in the tray, installed the tray, and checked the alignment of the elevator pushrods. I was really close and will only have to notch the former rear of the servo tray a tiny amount to allow for perfect alignment. I was aiming for the second to last (Outer) hole on the horn. I will install a bulkhead to capture the elevator guide tubes after I notch the former, locking the guide tubes in position and allowing the system to function properly.

The inner guide tubes are for the pull-pull cables and will be cut much shorter when the cables are installed.

I also checked the depth of the cockpit area and there is plenty of room for a false floor where the pilot will attach.

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Old 08-12-2013, 01:37 AM
  #464
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Glad to see you're back making good progress! Looks super...
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Old 08-15-2013, 02:25 PM
  #465
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This morning I completed the installation of the Elevator Guide Tubes. The tubes were cut to length, the formers notched, and glued in place. The tubes, on the servo side, are captured by tabs I added to the back of the closest former. Everything lined up nicely. The tabs were kept short to ensure they dont interfere with the Rudder / tailwheel pull-pull cables.

Next I will add one more set of tubes for the tailwheel control cables. Then onto the Aileron Servo installation.

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Old 08-17-2013, 06:26 AM
  #466
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"The optional Aluminium Cowl should add a little weight."

If what I see is styrene, I would expect the aluminum cowl to weigh less.

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Old 08-18-2013, 09:53 AM
  #467
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I just finished up installing the guide tubes for the tailwheel cables. The tubes were installed into the former just forward of the tailwheel mounting plate. I added a 1/64 ply plate to the inside of the fuselage in that area to capture the tubes and prevent them from pulling the former off. The ply connects the tubes to the inner fuselage crutch structure.

This just about finishes up the fuselage construction with exception of the motor mount / battery tray. I'm going to have to think about that one so for now I am going to complete the aileron servo installation into the bottom wing. I need to run to the Hobby Shop to get some ply for the servo mounting plates to continue with that process.

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Old 08-28-2013, 01:20 PM
  #468
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Servo Hatches are about 1/2 way completed. I created some rails out of maple with some blind nuts installed and installed the rails into the wings. I installed the rails against each spar, thinking that would create the strongest attachment. Then I made the hatches, giving a little clearance around the edges for the covering and paint.

The aileron servos are on their way from Tower and upon their arrival I will make the aluminum mounts to attach the servos to the hatches then I will create the slot for the servo arm in the hatch. After that the wings need to be hinged and the aileron control horn installed.

After that, the wings are done.

Getting really close to covering....

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Old 08-28-2013, 01:35 PM
  #469
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You really need some button head screws for that:-)))))))))))))))) Allen heads look obscene:-))))))))))

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Old 08-28-2013, 04:15 PM
  #470
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I have some... The will be used on the final product. And.. I agree.

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Old 09-06-2013, 02:51 PM
  #471
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The aileron servos arrived and I spent some time this morning making the aluminum mounts. I have used this style mount on the last three planes I have built and I really like it.

They were constructed using some 1/16th Inch thick 1" aluminum angle. Now that I have a small mill I was easily able to create the mounts. Before I used a combination of my band saw, drills, and files.

Next I'll create the slot in the hatch for the horn and mount the servo to the hatch.

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Old 09-06-2013, 08:51 PM
  #472
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Hi SDP,

How are you holding the servo on the mount? Is the mount threaded or are you using nuts on the back side?
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Old 09-07-2013, 06:31 AM
  #473
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Quote:
Originally Posted by out2pasture View Post
Hi SDP,

How are you holding the servo on the mount? Is the mount threaded or are you using nuts on the back side?
I used some 2-56 nuts with nylon inserts on the backside.
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Old 09-07-2013, 10:42 AM
  #474
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Here is the final servo install. I haven't installed all the bolts as this is just a test fit.

The slot was cut using a 1/4" End Mill in my Sherline Mill. I'll tell ya, using a mill is much easier than how I did it before, two holes on each end, the scroll saw, and a hand file. With the mill it takes a few minutes and the slot is perfect.

Next I need to make the aileron horn, which will be custom made out of an aluminum sheet. I used the same setup in my 1/4 Cub and it is perfect.

SunDevilPilot

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Old 09-08-2013, 07:28 PM
  #475
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Ohhhhh, I get it now. The servo mount goes on the hatch cover and the cover is screwed down to the hardwood mounts. Very clever SDP! I'll remember this one.
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