BMFA University Challenge 2007 Model Airplane Crashes

You guys have "the …
You guys have "the wrong stuff"

Everything crash is …
Everything crash is "tail heavy" Just move the c.g forward..then it'll be OK!!

Yeah, they do fly a …
Yeah, they do fly a bit odd, but as i mentioned before, the winning aircraft carried 9kg worth of lead shot in the fuselage. Most of the others carried anywhere between 5 and 8kg, so yeah they do fly a bit off sometimes.

Just read the rules …
Just read the rules on their website… adding 3 to 5 kg probably had something to do with it…

Then why do half of …
Then why do half of them fly like they are tail heavy?

what do u can it an …
what do u can it an "a/c"?

just google, BMFA …
just google, BMFA University challenge, the rules are on their website somewhere

can you send me the …
can you send me the rules then, cuz ima try it

all the aircraft …
all the aircraft were built from design, so before any geometry was designed or made, calculations were done to find the neutral point, the take of run legnth, range, lift coefficient, max payload, tail plane take of rotation required, stability margin… plenty more than just replicating an existing a/c.

yeah more wings …
yeah more wings more lift but there are however limits, The relation with lift to mass has a limit, so if u keep sticking extra wings on there will be a point where the lift ur producing isnt overcoming the extra mass of the wing. also the planes are the first planes that any of the students have built, i bet ur first plane didnt have a 3m wing span, being able to lift anywhere near 9kg. Gearboxes were considered but a direct drive was part of the rules to make it more challenging.

british? my bad, i …
british? my bad, i thought it was my crappy countery were powerd flight was frist proven

they still suck ass …
they still suck ass,real flyers not beineg able to think of a plane that fill fly even with out testing,and the lil 1hp engine,gearbox!, duh! ur chances of blowing out the shaft are greater but the risk will pay off asuming u use the correct ratio,and u know why the fokker dr.1 had three wings? BECUZ IT HAD A HEAVY ENGINE! more wings more lift,i might try this challeange on my own,seems kinda difficult

that was the 'crash …
that was the 'crash investigation' for the aircraft that crashes in 0:50, flutter caused the ailerons to fall off!! The most spectacular crash of the day i think!

first, BMFA stands …
first, BMFA stands for British Model Flying Association, second congrats with the replica build.. But the a/c seen in the video are designed purely around manual calculations so its inevitable that some crash. The succesful a/cs' also achieved a payload to dry weight ratio of around 2.9, many crashed pushing this limit! Considering that it was limited to a 1HP engine lifting 9kg this makes flying these a/c extremely tedious, the pilots are very experienced model (and often real) plane flyers.

00:26 i wonder what …
00:26 i wonder what happend…..

just wasting …
just wasting americas tax dollers,noobs also,cant even fly an rc model?, i built a 40% fokkerDr1 last year,and im only 15

AHhh Now it all …
AHhh Now it all makes sence THANKS! I guess the fact that some of them even made it off the ground at all was a feat in itself.

lol, yeah it is a …
lol, yeah it is a funny vid, but all the crashes seen are due to technical problems, such as flutter in the wings, bits breaking, controls not working. The planes were flown by experienced pilots (RC and Real Aircraft), who were non students.

This was the BMFA …
This was the BMFA University Challenge, objective to achieve as high a Payload to Dry aircraft Weight ratio. All the planes you see are built by students during one semester of their uni course, keeping in mind none of them have had any experience with building model aircraft before. Most people wont appreciate the performance of these things but the winning aircraft carried a payload of around 9kg, the plane itself only weighing about 3.5kg, and powered by a measly 1HP engine.

Thanks for the …
Thanks for the feedback, it was just a semester project during my university course so we wont be rebuilding anytime soon. We did consider things such as dihedral but we just didnt have the time or skill to do the manual work for that. Thanks again

c koi c avions en …
c koi c avions en carton ???

What was the " …
What was the "challenge"? Who were theese people and what was the event?

Gee and these are ' …
Gee and these are ' Expert pilots ! ' May be the students should just fly the planes instead.

Thrust to weight …
Thrust to weight ratio flying is nearly impossible for a professional stunt R/C pilot.These guy's gave it a heck of a try.They all will be great Aerospace Enginere's some day.Thank you for pushing the envelope.

A couple of …
A couple of suggestions. Use at least a little dihedral for stability. High aspect ratio doesn't work all that well at this scale. Try a LARS lifter. Use some camber, toe-in and caster on the landing gear and make a deeper fuse to allow a shorter gear. Do a search for the Lazy Bee.