|Feb 10, 2014, 07:50 AM|
The incredible flying brick
If I have to say so myself, I think the Super Taiji was the best flying airplane I ever owned. But I never really liked that wedge spring clip to hold the wings in place. While flying on downwind for landing at about 150' AGL, the plane experienced some very hard rolls left and right--much faster than I was ever able to achieve , even on high rates. My thought was radio interference, or jamming. The plane wasn't pitching up or down, nor turning left or right. It only exhibited a very high roll rate left and right. Eventually (about 2 seconds later) both wings said goodbye to the fuselage and ejected left and right. Instantly, the fuselage became an incredible flying brick with the only intent to bury its nose back in Mother Earth . Incredibly, the wings took about eight to ten seconds to reach the ground as they fluttered down--they landed about fifteen feet apart from each other with no damage and the carbon fiber wing rod still sticking out of the right wing. A couple of other old head flyers at the field said they didn't think it was a radio problem. Rather, they felt that one of the spring clips had worked out of the wing tube and this caused the excessive flutter. With one wing gone there was nothing to hold the other one in. Back to the brick--I mean fuselage. For about six inches from the spinner back was total trash. When I removed the cowl, out fell about fifty small pieces of plywood. None were larger then about a half inch long. The cowl was toast as was the canopy. Surprisingly, the motor is okay. The ESC (70A) is also toast, having cracked in half as well as both capacitors splitting open. Also scratch one 5S 4000 Mah battery. Thankfully the ($90) receiver was okay as were all servos. From about six inches rearward, there was no damage. I don't think I'll try to rebuild a new front end because I know it will never fly like it used to. And by the time you buy a new fuselage, cowl, canopy, and vertical stab, you might just as well have bought a whole new plane. I never did like the wedge spring latch attachment system. It seemed like after a few flights, it just didn't stay as tight as it used to. I kept telling myself I was going to glue in the wings. I waited to long! This is a sore point with me as I had attached the wedges appropriately, and they failed me ( at least one did) Clearly, on a pattern plane that experiences aerobatic flight, a more secure way of attaching the wings should have been made. I was straight and level at the time and had reduced my speed in preparation for landing. Maybe someday I'll get another, but I'll be sure to find a better way of attaching the wing. Sure, this is a rant, but it's also a warning to others to don't trust the spring clips.
|Feb 12, 2014, 04:46 PM|
What rotten luck, You are the first to post on here about the wing attachment wedges and springs failing. I've only seen one plane turn into a lawn Dart and that was a Andrew's Aeromaster back in the early 70's. He forgot to add the additional rubber bands to the wing before taking off.
I've quit a few flights on my Super 40, and I agree that the wing attachment method sucks. So far I've not had any trouble, but will keep a close eye on the Wedges and spring clips.
|Feb 12, 2014, 06:33 PM|
Although I don't own the Super Taiji 40, I am in the process of building its MUCH bigger brother, the Commander 50cc.
It uses the same style wing attachments, so I will gave to pay careful attention on the maiden and subsequent flights.
I woukd really like to avoid a 20lb, 87" fuselage lawn dart
Have you forwarded this event to Fai at Airborne Nodeks in CA
|May 18, 2014, 03:41 AM|
Sverige, Värmlands Län, Filipstad
Joined Jan 2009
What is Your previous flying experience with "low-" (or mid-) wing planes?
Seems like Super Taiji 40 will work to fly many F3A manouveres.
What seize plane do You prefer?
I have a good 30-seize plane that works very well to fly F3A style flying, it is a Sebart Angel S 30E. I have used mine for 4 years. Wingspan 1280 mm (50.4").
Super Taiji 40
Axiome 70 EP, wingspan 1420 mm (56").
FMS F3A Olympus 1400 mm (55")
Sebart Wind S 50E (I have this since 3 years), wingspan 1580 mm (62.2").
There is a new Sebart MythoS 50E soon (probably in July) that is the Little brother of the larger MythoS 125E and MythoS Pro (I have the MythoS 125E and MythoS Pro).
The FMS F3A Olympus 1400 mm (55") has the advantage that it is made of foam (EPO) and will be easier to repair if You should hit the ground for whatever reason. Should be very fast to get ready to fly also.
There is also a small F3A biplane that seems to be popular and flies very good, Arcus F3A biplane, wingspan 1000 mm (39.4").
Good luck in selection of first F3A plane.
|May 18, 2014, 01:47 PM|
I have big experience with low wing planes...
You did a very usefull F3A plane list that I was Iooking for..
|May 18, 2014, 01:55 PM|
Another EPO F3A style plane that has been reviewed and discussed here on RCG is the AirMaster 40EP (previously named the Commander 40 EPP)
I like mine, great 4s size practice plane. Available from Fai at Airborne-Models in CA, just like the Taiji.
|May 19, 2014, 12:55 PM|
but I'm looking for balsa F3A pattern planes!
|May 19, 2014, 01:01 PM|
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