(First maiden flight try here: • Eachine T-28 Brushless... )
Here is my video for building a brushless and DSMX-compatible version of the Eachine Mini T-28 Trojan using replacement foam parts and more. The fuselage, wing and tail from Bang Good came to about $30 shipped and took 2 weeks to arrive (time can vary).
I basically built this one using the same identical modification procedures I used for my brushless P-51's, so review those videos for finer modding details, please. The aircraft are very similar.
I recommend buying the replacement parts over cutting up a ready-to-fly plane for an easier and cleaner build. If you already have an old plane you wish to mod, that's fine too. Just have lots of fresh, sharp blades if you do. This EPP foam dulls new razor blades wickedly fast.
I re-used the 7A ESC and RacerStar 1108 motor I had originally installed in my "super" mini Corsair, which now has a 10A ESC and slightly bigger 1207 motor and battery for more speed and climb performance. The T-28 is quite light and nimble in stock form and I wanted to try to keep it that way, and I think this motor/ESC combo is more suitable for it.. I expect good things.
As usual I went with a programmable AS6410L receiver with AS3X for rock-solid flight and full aerobatic capability. I tap power for it off the ESC battery leads and feed it directly to the Channel 6 servo port, the signal lead of which I use to control said ESC. See my earlier brushless Mustang and ESC videos for details. An Emax ES9251 2.5g servo handles aileron duties and 3.7v power nicely.
I have heard of these black-on-black pop-off propellers and hubs getting lost in the grass too easily, so I used an aluminum hub that doesn't shed propellers like a dog sheds hair. My motor's 1.5mmØ prop shaft is short at only 3mm long, so I had to grind a few millimeters off the base of the hub right up to the set screw threads for a good hold with the screw. It's fine now.
An M4 x 30mm nylon screw holds the wing on, anchored to a piece of 3mm (1/8-inch) hobby plywood epoxied to the fuselage. The hole for the wing screw was bored through the wing just in front of the carbon fiber wing spar. I used a sharpened section of 3mm brass tubing to make the clean hole
The aileron servo is recessed deep within the top of the wing to provide enough room to clear the receiver board within the fuselage (space is tight). The base of the servo is flush with the bottom of the wing center section. I used the same internal linkage set-up for the ailerons that I used on the mini P-51's to get all of the hardware out of the air stream. Less parasitic drag can mean an extra MPH or 3 at full power.
All good so far. My only issue is the terrible rubber-film-like paint on these planes. I tried to be careful with handling, and it still shedded red/orange and black paint. The Corsair was similar. Like the P-51, the red tail seems to be coated with tougher stuff. I fixed most of the black defects but I need to match the orange paint with something. Safety-orange maybe?
Another one added to the flock to test fly. I still need to test the Pterodactyl and the MIG-29 to wring out gremlins, give the brushless Corsair a good run and work out the ESC power issues with the F-22. With colder weather coming I hope to have more chances to use the big flying field for these first test hops versus the smaller site available. With unpredictable prototypes, I prefer flying fields with less trees nearby ;-)
Happy Flying!
25 июл 2024
