Skip navigation

Contract: Login Login / Search

Helicopter Build - Minicopter Diabolo 700

Post

Helicopter Build - Minicopter Diabolo 700

Final tuning done today.Both the Diabolo, and the 6hvu flying very well with very little to do. The 6hv has a few tail kicks, and bobbles to deal with but nothing huge.I flew the 6hvu like I stole it today for the first time, and it flies very gracefully. The diabolo flew great too, but being a power house I'm a little scared of it Dang thing pulls like a horse!
Back to the top

Post

Seams like the fine tuning can take just as long as the build doesn't it? What fbl units are you using on these beast's?
Back to the top

Post

I'm using Ikon/Brains on the Diabolo, JR Forza 700, and on the 6hvU. I have Vbar on my Henseleit TDR, and Mikado Logo 550SX. Also I have a Futaba CGY-750 that I might put on a Compass Atom 500 to setup for buddy boxing.

Tuning really depends on the airframe. I didn't really do much tuning on the Diabolo, but the 6hvU gave me fits trying to get the tail right. Also the 6hvU has some bobbles on hard stops, but it should  be ironed out soon. To get the FBL tuned to fly isn't hard, but getting the small flaws out can take some time. The harder you fly the more little flaws you will find in the way your heli flies.

I had Skookum 540's and those were a handful to get tuned, and I finally gave up. Sometimes you have to live with some little hiccups.
Back to the top

Post



So I've been getting more flights in on the Diabolo lately, and finally feel confident enough to fly with the canopy on. After a few flights I'm finding with the rising temperatures the heat builds up quickly in the canopy. The motor is getting hot enough now that you can only keep your finger on the can for about 3 seconds. After some research that Scorpion has come out with some 30mm HV fans, so I ordered up 2. One will go on the heat sink for the motor and the other on the esc. I'm glad I pre-wired in power the fans! Also the backup guard will be installed for the electronics before the next flight... Dang it, more wiring.

The Tri-tail is a screamer! I've started to push the Diabolo with Piro pogo's, and piro tic tocs pushing the tail now too. Now that I'm testing out the holding power I'm finding that the tail begins to squeal similarly to a formula 1 car engine sound. I haven't tried any reversing piro stuff, but I can tell when that the tail is very strong. Probably the most powerful tail that I've flown.

The main blades were also down sized from Cyclone 715's to Switch 695 xf blades. The Cyclones are aggressive on pitch, but not on cyclic speed on the lower headspeed. Now with the head speed bumped up from 1950 to 2180, and dropping down to the 695s has made a huge difference. I knocked the pitch down from 14.5 degree's of pitch down to 12.5, and the pitch is smooth with authority at full throw. The only downside is a low flight time at 3:15 with only 70% left in the packs. I'll keep extending the flight time til I get around 50-40%. I'm hoping for anything over 3:30. Anything longer than that flying aggressively is too long for me. 

Overall power of the Helicopter is humbling with it also. I can tell it has ample power for our altitude, and is a little scary to be honest. It can do really fast and short aileron tic tocs with no bogging. Really, I can't think that I've bogged it at all yet. I've flown my JR Forza back to back with the Diabolo, and they couldn't be more black & white between the 2. A helicopter setup for all out power, and the other for lightness are 2 different worlds. To be honest the lighter is less stressful, and more enjoyable. Non the less, the Diabolo is a kick in the butt!:o
Back to the top

Post

Added 2 30mm fans on the heat sink, and 1 25mm fan for the esc. You can also see the Scorpion BEC Guard there too. We will see if this will keep things cool under the canopy now!
Back to the top

Post

Neat machinery. :thumbs:

Onward and Upward.
Back to the top

Post

Machinery is right. You heli guys are something.

Thermals---I need thermals!
Back to the top

Post

Thank you for the compliments, guys. This helicopter has sucked a lot of time and money out of me, but has been worth it.

I flew it last sunday about 5 flights, and Oh my gosh! This is a crazy powerful machine, and by far the most powerful that I've ever built so far. The sound alone is scary with the 3 bladed tail and the Switch XF (extreme flight) blades. Its going to take sometime to get used to the over powered setup, I think I have built a real bread winner, and I'll cry for year when it goes in!
Back to the top

Post

:offtopic: Not really Diabolo related, but have something that happened recently flying. I haven't been crashing much in the last few years, but that seems to have changed. The last crash I had was at the club field the first time that I met Carl Shoup, and believe me, he really wanted to know if I was safe as a helicopter pilot before he would let me fly. i had a few flights and my last flight I must have forgotten to flip into 3d mode. The 700 sized model was upside down about 10 feet off the ground, and the motor turned off. I barely got it back upright but so little speed left in the main rotors... end result was a pricey blade strike with the ground.

Fast forward to now. I was out not at the field but somewhere closer to home flying around on a saturday morning. I ended up having the best flights that I've ever had doing things that I've never attempted before, but could do well on the simulator. I was excited to say the least. I had 2 packs left, and I get a phone call from Jim F that Carl had passed away. Talk about a blow... I sat for a while and thought about Carl. I really just wanted to go home after hearing news like that, but after awhile of just deep thoughts I really didn't want to go home and discharge my packs for a few hours. I decided to burn the packs on 2 hovers since my heart definitely wasn't in it anymore. You can see the results below.O_o


It was right on take off and I knew exactly what I did. The controls were totally wrong, forward was backward, left was right, and up was down. It was actually quite comical watching the model flop around as I was finding out that the controls were messed up. The tail ended up stuck in the ground, and the helicopter kind hung there for a moment with the nose up at a 45 degree angle. Then the eminent chicken flopping commenced. I looked down at my transmitter, and the model selection was set to the wrong model! 

Its a strange coincidence, and I'm not blaming Carl... but dang it! :o I had a feeling Carl seen it where ever his is. I hope he got a good laugh at it.

Funny story that I thought I would share.
Anthony
Back to the top

Post

Ouch.

That's why I quit flying heli's, I couldn't afford the crashes.
Back to the top

Post

Ah, I think that Carl was pretty averse to having any airplane crash. But, I must say that when I saw him do it, he was always very philosophical and calm about it. Can't say I share those traits when I bash one.

Thermals---I need thermals!
Back to the top

Post

Ouch!! I hate seeing the damage done after a chicken dance. How many parts did it get?
Back to the top

Post

Well… after a few weeks of ordering parts and still missing a few items.

Boom
Boom support holder
tail shaft
tail slider assembly
tail grips
tail grip holder
tail linkage
tail linkage guide
feathering shaft
main shaft
front tail belt pulley
main blades
2 gear sets in the cyclic servos
misc small parts (nut's and bolts sheered)

There is probably more, and I can't remember. I also changed up the colors scheme of it too. I got a yellow 550SE canopy, canopy magnets to keep the back together, yellow boom fin, and yellow w/ blue tail fin. I'm going to see this weekend if I got all the parts, and try again.

Crashes are inevitable, but seems to me that they are easier to avoid than an airplane. In my experience...

Anthony

 
Back to the top
1 guest and 0 members have just viewed this.