Eachine T-28 Trojan - Brushless Mod - Main Build Video
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- เผยแพร่เมื่อ 29 ส.ค. 2024
- (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!
I shave off all the little moulding dots with a scalpel, makes a difference 😊👌🏼
Definitely looks better.
Very nice!! Would love to see a side by side in flight video of the before and after at full throttle! Great work!! Just subscribed!!
I hope to get video soon, now that I finally got my anti-virus shot.
Until then, my first brushless P-51 has the same 1108 6000Kv motor and provides an example of what the T-28's performance should be like. th-cam.com/video/qxGHk7n9dV0/w-d-xo.html
Skills mate👏👏👏
This is brilliant. I would love to do this but I know the skill set isn’t there anymore. Two years older than you... brain cells kinda iffy lately. I have the spare body and wing-set and an un-flown T28... maybe later in the season after I bash it up some. Great job bro, stay safe.
You too. And remember:
... We don't stop flying when we get old. We get old when we stop flying. ;-)
Happy flying!
Better to use UHU Por in my experience so you can get it apart again much easier
I like to use RTV clear adhesive for bonding the wing forthe same reason. Though I find making the wing a bolt-on item even better. Happy flying!
Looks nice! You can build one for me 🤗
CCR BRILLIANT
NICE MOD
BRIAN 🇬🇧🇬🇧🇬🇧
Very cool!
Thank you.
Did you replace all the flimsy control horns that come with the plane? if yes, what type and size you use? thx
What would be a good alternative moter to the racestar, and the esc since both are not findable.
The Emax RS 1108 6000kV is a perfect substitute: www.amazon.com/EMAX-RS1108-4500KV-Brushless-Quadcopter/dp/B07Q2PHDNR
Lately I've been using the Eachine / Ysido 1204 (for Tyro89) 6000kv for 1S powered micro aircraft: www.aliexpress.us/item/3256804641541103.html?gatewayAdapt=glo2usa4itemAdapt
The 7A 1S-2S ESCs are still on eBay and Amazon among other sites: www.amazon.com/Electronic-Controller-Suitable-MultiRotor-Aircraft/dp/B08GFC7CSS
Alternative ESC is this very nice 12A 1-gram unit sold by Buzzard Models. I've bought 3 so far: www.buzzardmodels.com/mx-12a
Happy building & flying!
Hr308f brick out of the E-flight aa3x extra work if a guy just wanted to replace the stock board and keep it brushed
No. I have one. The brick from the "AS3Xtra" (part number EFLU5164) is limited, not programmable and has to be mounted awkwardly on it's side like this: imgur.com/undefined
Plus it has unique programming like running AS3X while hanging vertically by the prop alone. It LOOKS similar but is far from. Not the best choice for retro-fit.
The brick I use is from the PT-17 Stearman (AS6410L) and can be programmed for mounting orientation and AS3X strength and direction. It can also allow for full time AS3X or set channel-5 to turn AAS3X off and on as desired.
THAT'S the brick you want for 1S power. Also try the EFLU4864 for 2S power and similar programmability if you need onboard rudder/elevator servos or the AS6410NBL for external servos. Beware bricks that look identical but are coded differently.
Happy flying!
@@Doggeslifethanks for the info!!! I just found a few if the bricks you recommended for fairly cheap!!! Clear skies!
@@jordancoleman2402 Cool! Hope to see video someday of what you conjure up. Happy flying!
@@Doggeslife been thinking of starting a TH-cam channel some day soon. I'll send you the link when I do
@@Doggeslife could a umx brick be used with a delta wing? If the radio was programed properly ?
I have a spare SAFE A6420BL DSMX 6-Channel Ultra Micro Receiver (from UMX CIrrus) and a spare (non SAFE) AS6410NBL DSMX 6-Channel AS3X Receiver (from UMX Pitts). Can either of these be used as part of a one cell or two cell mod to the T-28 or P51? As a result of your mods/testing is the one OR two cell battery preferred? My goal is to have a brushless motor and eliminate geared motor. (SAFE preferred) .
Sorry, but something happened to my reply I made yesterday. I repeated my answer in the RCgroups.com forum thread where you repeated your question: www.rcgroups.com/forums/showthread.php?3960437-Eachines-400mm-BF109/page2
@@Doggeslife thanks,
How does it fly? Really curious. thanks
No maiden yet. My flying sites are very access-limited due to lots of people. I fly when I can.
I expect good things, being it's the same set-up I used in one of my P-51s.
Happy flying. Hope to have video for you sooner than later.
Did you use acrylic paint ?
No,. Rustoleum. The EPP foam used is tougher than EPO foam as used in many other micro planes, and doesn't melt under the effect of the solvents in spray paint.
How did you program the AS3X as mentioned in the video?
I started here learning about "advanced programming" (simple process really): www.rcgroups.com/forums/showthread.php?2140166-AS3X-Advanced-Prorgamming-Settings
Then I acquired Spektrum's USB cable .... lots of them found on eBay if you search under "AS3X" there: www.horizonhobby.com/product/usb-interface-um-as3x-programmer/SPMA3060.html
Finally I downloaded the PDFs from Hobby Horizon that includes download links to the drivers needed for the receiver to talk to your
PC.
USB Interface Software Download (XP, Vista and Win 7):
www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/dw45ff974f/Manuals/AS3X-Programmer-file-7-27-12.pdf
USB Interface Instruction Manual:
www.horizonhobby.com/on/demandware.static/-/Sites-horizon-master/default/dwcef85c50/Manuals/SPMA3060-Manual.pdf
The manual tells how to activate the "X-port" on your receiver (the 4-pin socket) using stick positions on your transmitter. Note that the servo directions in the TX for the axis's used in the process have to be set to normal (N), with none set to reversed (R), else it will not work.
Someday I will make a how-to video once I get enough of it figured out. For some reason I have to reinstall the drivers to get it working properly on occasion. Be sure to install the standard driver before the one specified for Windows 7.
I do not know if it works on Windows 8 or 10 in emulation mode, or if there is an Apple PC version. I still use Win-7. The UMX Cessna uses different cables than all the other micro receivers and one of them works with phone apps via the headphone jack, but I don't think it's compatible with the other micro AS3X bricks.
You can use the RCgroups.com link above to ask other members about using the software with their newer operating systems or on smartphones if possible.
Hope this info proves helpful. Happy flying!
Where does the motor wires solder to on the board?
Greetings. The brushless motor is connected to the separate ESC (electronic speed controller). The ESC is pluggd into the channel six servo port and mixed with the throttle in the transmitter. Details here: th-cam.com/video/Hu6T8g7u7BY/w-d-xo.html
Wonder how it flys the stock setup flys like a beast as it it
Hmmmmmm I wonder if it's too small for retracts. I'm seriously considering gutting my umx turbo timber and throwing everything in the eachine t28
I've seen retracts in small planes, smaller than these even. But they need to be light, so make sure you have a smooth runway.
T-Timber motor in this would be awesome.
Sorry but is a model volantex?
YES.
Would it be possible to pay you from a pre-built version?
Sorry, but I do not build-for-hire. Instead I record my builds to try to inspire others to try. I'm attempting to put back the modeling part of the RC model hobby that Ready-To-Fly offerings have taken away. Hope everyone gives it a try someday.
Happy flying!