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View Full Version : Bobby Watts Down-Under with Ion-x2


TomC
05-19-2007, 04:33 AM
I just drove back from and Xcell fun-fly at Coffs Harbour, about 1/2 between Sydney and Brisbane on the east coast of Australia. I had to cut my trip short because of a bad eye infection. I must have got a bit of grass seed when fine-tunning my Ion out at field last Wed. Of course it flaired up, just as I got to Coff's on Friday, so I never even got a fly!

Still got to meet Bobby Watts on Friday afternon and saw him fly the new MA Ion-x2. This made it all worthwhile. Bobby is a very nice young man (18 yo), a great flyer, and a credit to MA imop!

I stood next to Bobby and watched him fly his first Aussie demo flight with the Ion-x2 and it was the scariest ~3 minutes I have ever seen! Sorry, no actual measurements, but I would est that his HS was +2100 rpm and was pulling +4400 watts out of the motor and ~100 amps from his 2x6s1p 5000 Evo25 packs. After all this, the CC HV110 esc was body temp, the motor (Actro 32- 3 or 4, I'm not sure) was ~120 deg f, and the Batteries were a little warm-hot (~130 deg f). Mind you, this as after only ~ 3 min so all things could have heated up a lot more after that. He said that 5 minute flights were the norm.

The main points I noted were that the Actro motor has an 8mm shaft and that the main gear (90t?) was doubled. Also, the belt drive was tight-as-a drum. Bobby told me that this was all necesary to avoid breaking and stripping things at such high power loads.

The vertical tail fin was double width and the boom was Al. Also, he used a x-cross boom support. The open tail gear used the new metal bevel cnc gear. This was all to help the nose-heavy CG and to reduce the cost of the CF boom (said that all MA heli's will now come with Al booms standard). Even with this the heli is still ~ 400g nose-heavy. There was no horiz fin (like the Razor). Also, the landing gear used were the Razor's which at ~3 oz lighter also helps raise the CG a bit.

The head was stock Stratus, and had metal upper mixing arms.

V-blades were 710mm main, 105mm tail and 90mm paddles.

All in all, a very impressive heli (and flyer)!

Would I want to fly one? You bet! Would I want to own one? No, too much power for me to handle and equip/maintain on a regular basis imop.

All I want is a 90 sized E-Heli that fly's like a 90 sized nitro heli, not a 180! Still, fun to watch and a great machine imop!

Cheers,
Tom C

misskimo
05-20-2007, 12:12 AM
YEh! I wish I could have been there , they been doing there home work , finding all the weekness that can to solve it before Ion 2 comes out , thats what I thought about when doing my belt mod and cutouts , the 2 6s1p 5000s was ganna make it nose heavy , she will rip though , cool about the 2 90t main gears butt to butt , but the 10t pinion IMO wasnt big enough since we are dealing with gobs of power , 11 or even the 12t would be way better and the single 90t main , 18 tooth pully or bigger would be needed , I would like to see a completely new frame design that could stager the batteries like I was doing on my Evant,
I bet it was a trip , Bobby can put some stank on a machine, I bet he did this , went way up , came straight down tail first , pulled out a few feet above the ground huh? thats the one that made me loose my voice at IRCHA. No fear! :smokin:

misskimo
05-20-2007, 12:29 AM
oh , sounds like he was running 2300 or so , since the flight time was short , 5 min tops , 400 g nose Heavy :WOW :WOW :WOW :arggg: :arggg:

TomC
05-20-2007, 01:14 AM
Tony,

You might be right about the HS, probably 2200 at least. Those 710mm V-Blades were really singing up a storm!

The 400g nose heavy CG did not seem to affect his great flying though. I think that MA needs to fine-tune the battery placement, esp with these larger 5000 packs. Maybe they could mount them vertically, one on each side of the front fuze?

I'm sure they will figure it out since they seem to have figured out everything else just great so far. This is going to be one mean machine when it finally hits the streets!

Cheers,
Tom C

TomC
05-20-2007, 05:08 PM
Tony,

Also, forgot to mention that Bobby was running +/- 15 deg idleup pitch. We measured this with a pitch gauge after his flight. I never heard it bog once. Scary stuff!

Cheers,
Tom C

misskimo
05-20-2007, 11:34 PM
yeh! I bet it did rip! that would explain the short flight time he he ! Zing Zing Zing, well its sounds plently beafed up now