R/C Caribou test flight goes wrong
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- Опубліковано 5 вер 2024
- After the day's flying was finished at the Southern Cross Warbirds event at the Tin Can Bay Model Flying Club. A second-hand standoff scale Caribou, refitted with modern engines and radio gear flies again after a long time out of the air. The test flight doesn't go as planned.
More info: Regarding some CG comments, it wasn't tail heavy and it had extra nose weight added for the test flight. What "looks" like tail heavy is because, while the test pilot had his hands full, he asked to owner to add down trim on the radio. Up trim was inadvertently added, hence the pitching up. Once the trim got sorted at the same time the engines stopped, it flew (glided) OK as you can see on its stealth approach to the tree tops.
Throttle back .... and slow down on a maiden flight. Then trim it out . the aileron may have stayed on . Oh well ,, there's always another plane .
As soon as it showed signs of flight instability I would have backed off power and turned it back to the field for landing straight away.....looked very much tail heavy right from liftoff
He was doing a pretty good job of bringing it in too. That pitch-up almost emulated the famous video of one crashing after cargo shift.
I know which video you are talking about, I was under the impression that someone had forgot to remove the gust lock from the elevator
The slow motion audio was killer!
I've had models detach flying surfaces due to severe flutter. I've found that balancing the surfaces, no matter how small - I even balance indoor models - helps control flutter. A tight pushrod connection also helps, but flutter is torture to a servo and will eventually make it fail.
Excellent work by the test pilot! Looks like he was dealing with the "dogs breakfast" from the get-go but still managed to maintain a degree of control despite the obvious trim deficiencies. Looks like most of the damage will buff out and the Caribou will have another chance to redeem itself.
Aileron detaches, both engines cut. Seems like a well prepared models for the test flight.
It used to be my professional job to deliberately crash new model designs. This was to determine any weaknesses in the design and to determine what spare parts the manufacturer should have available. I'd then have to write the Repair Guide and advise on any design modifications to make models more crash resilient. Crash Resilience is something all model builders should think about.
This tree had no gaps line got me rolling.
"The model failed the flight test" - Thanks for clarifying :P
Tail Heavy. The pilot did well. but might have saved it had he tried to land it sooner .It was obvious there were significant problems.
I started a build of one of those but stopped when I found that the amount of weight needed to balance gave a wing loading that was unacceptable.
The Radial engines on those are extremely heavy.
Truly Beautiful and VERY scale Caribou, sorry to see her go in like that, she will return!
man, after seeing it fly through those tress, I really wished it survived! Hope it comes back to life someday
Kudos to the test pilot for doing an incredible job trying to nurse this wounded bird back to a safe landing.
Nursed into a tree. Amazing skills
@@barleyhopps bet the pilot wishes you were there, because you are the one and only truly great pilot that would have done better under the circumstances. When I grow up I want to be you!
@@shanec6633 Thanks, but you really need to set your expectations higher.
Not bad for stand off, funnily enough it actually sounds like a Caribou in mating season. Sorry for your loss - the world needs more Caribou -like models at the fields . Whoever thought you could get flutter on a Bou!!
Thanks for sharing this video, she was a great looking craft! There were probably multiple set-up factors at play (like CG location, engine thrust angle, trim angles, or simple surface alignment. Clearly the aileron was an issue that would cause the roll/bank trouble. But the way she kept climbing indicates something else. Further, twin engines provide a lot of thrust, so less throttle might have helped. Best of luck with her...rebuild it, she's looks like a worthy ship.
It appears that last tree had no gap
Climbed pretty strongly for two 20cc motors hauling a 16Kg model. That surprised me.
Such a narrow wheel base! Like an ME109E.
I love a good stealth approach to tree tops in the morning.
Always sad to see so much damage and on the first test flight. Sigh. Obviously full check out of all construction might have helped but not all issues can be seen outwardly. (Fuel tanks) Looks like that last tree needs a little height adjustment to reduce it's "Reach." That was just so close to a nice recovery.
Enjoyed ur video but sad about the Caribou. The full scale was a great plane and very durable and often had tree branches in the landing gear back in the day. Those Canadians made a great plane.
well at least it did not take off and go right into a vertical cimb then crash into the ground moments later like that Full scale one did many years ago
That was a very brutal crash i remember, the control lock(s) were still engaged ...
Oooooff!
Jeez that one had just about anything and everything that could go wrong, actually did go wrong. Great example of cascading failure. "Cascading failure is kind of failure in a system comprising interconnected parts, in which the failure of a part can trigger the failure of successive parts."
So, the unexpected engine stop was caused by fuel starvation - it first looked like a deliberate decision - maybe to stabilize the flight with only one aileron. Bad luck. Hope to see it fly again. Good video details.
_"The tree only had a light prune and will silently wait for its next victim"_
*Gold.*
also,
Challenge Accepted lol
Cariboo became Cariboohoo after that landing 😢
Looked to me like the model has a lot more dihedral than the full scale aircraft? I could be wrong but it sure looked like it to me.
That'll buff right out. 🙂
Ah, 'stand-off scale', yeah preferably in the next paddock.
Bummer!
lesson: just stuff it in a tree if it's going that poorly.
Double darn it
That sucks. I feel for ya
Great efforts on saving it but Dude,,,,,,,,Kill some of that throttle,,,Running almost full throttle when a plane has issues is a perfect storm for disaster. Should have dropped the throttle before it got that high and far away then baby it back down.
Next time pull the throttles back "Test Pilot"
I've had a few days like this
It looked like it was trying to find somewhere to crash from the getgo ,,an aileron detaching is shamefull preparation,,, it was only going to end badly,,thankfully no one was hurt
Lucky war doesn't rely on luck
Thrust lines?
Oh mate 😢
3:33 lol my ears
So sorry looked like a really cool model....Only thing that DID NOT GO WRONG was the tires didnt fall off before hitting the ground....sorry man
The slow mo editing on this is so annoying
Oh well, that is the hazard of flying models
When buying used models buyer beware. I speak from experience.
All totally unnecessary!😂
😒😒😒😒
It's trash.
lol when it smashed
why is "reducing throttle to something less than 100%" simply not an option, for the vast majority of rc operators...,?sheesh.