Frenzy down

[simusphere]

Well it had to happen some time but Sunday was the day for me. First flight of the day and everything was looking smooth as usual and I decided to flip inverted to do a straight line inverted pass and when made some corrections in roll to straighten everything out the bird continued to roll in the direction that I gave it initially. Tried to wiggle the sticks etc... but to no avail, she was going in and nothing I could do about it.

Unlike other crashes this one did not upset me as much. When I looked over the damage I was pleasantly surprised to find very little damage to the heli and after adding up the parts for repair it worked out to be less than $50 for Frenzy parts plus $65 for the failed servo and of course let's not forget the blades $100 Rotor Tech 610's. For a grand total of $215. Not bad at all for crash that started at 100ft up in the air and drove nose first into the ground. Surprisingly the canopy had very little damage. I couldn't believe it.


Failed parts list:

1. Radio tray
2. Upper mixing arm
3. Landing Gear
4. Front canopy mounting stand offs
5. Tail boom

The main shaft is perfectly straight and the feathering shaft too. That is amazing! All I need to do is replace the bearings on the main shaft and it will be good to go.

Cause of the crash:

So the cause was pretty obvious after looking at the failed pitch servo. It was an Align DS610 servo that burned up in flight causing the roll when collective was changed. It is quite possible this was my fault due to running these servos at 8v instead of the standard 6v. I will not be running the DS610's at 8v anymore since the difference in feel of the servos is negligible. Lesson learned.

[brian94066]

i knew those align servos will burn up on 8V

best to stay with servos that are sure to NOT burn out on 8V (i.e BLS451)

i still have doubts about 8717s on 8V, i've heard some bad stories on it

sucks you crashed though, but good thing parts are super cheap, i mean...$5 for a 50 size boom!!!!

[rese]

Whatsup mike this is rese i see you put your heli on line, thats a good thing now the guys know not to use 8 volts on those servos and just to let you know i did go to 140 on my heli and its working great i like it much better this way feels and handles great.

[simusphere]

Glad you like it rese. Guess what I just bought? Another Frenzy!!! Wooo Hooooooo

[bighands3d]

I have the 8717's on 8v to start with but back'em down to 5.8v on the align 2n1 can't really tell a difference in speed at 5.8v.

I was worried they might burn up as well at 8v.

[brian94066]

the regular 8717s run hot at 8V, the 8717 HV runs a little cooler, but won't last as long as BLS451s in 8V

[John Cook]

could have just been a bad servo ie defect that would have shown up anyway. I have about 30+ flights on my TREX700 and 610's at 2s Lipo and no issues. Several others with similar results. Szabo is running that combo as well I believe. Not to say you can't get a dud, but IMO it's a great servo value.

Sorry for your mishap, but glad it didn't cost too much

[brian94066]

yeah szabo and riva had been running it for months, hundreds of flights with no failure

i still don't trust them as much as 451s, never heard of anyone running 451s on 8V burning out

[raptorheli2]

Originally Posted by brian94066

the regular 8717s run hot at 8V, the 8717 HV runs a little cooler, but won't last as long as BLS451s in 8V

thats a lot of nonsense right there about BLS451's. let me guess you run BLS451's on 8v?. NONE of the servos mentioned here are rated for 8v (excet the 8717HV) so ALL of them are only as reliable as their last flight (as any servo is) but your cutting down the chance with less voltage/heat.

cheers

[grnmac1]

Does anybody really think that there is that much of a difference between 6v vs 8v ?? how much do we really notice? (speed wise) next time watch the servo at 6v then watch the servo at 8v. Can you physically see any difference? maybe just a hair. But in all reality does it really matter .The speed of your Heli is really in your pilot skills. Unless of course you have really ancient servos, and a really old radio. You want fast?? go to 2048 res in your radio and receiver and decent servos (6v) and collective management and you will be rockin (unless you have deep pockets for new gizmos )

[John Cook]

Originally Posted by grnmac1

Does anybody really think that there is that much of a difference between 6v vs 8v ?? how much do we really notice? (speed wise) next time watch the servo at 6v then watch the servo at 8v. Can you physically see any difference? maybe just a hair. But in all reality does it really matter .The speed of your Heli is really in your pilot skills. Unless of course you have really ancient servos, and a really old radio. You want fast?? go to 2048 res in your radio and receiver and decent servos (6v) and collective management and you will be rockin (unless you have deep pockets for new gizmos )

I don't run straight 2s b/c of speed. Actually only one of my helis runs straight 2s lipo. I have 2 more that run straight 2s A123 Rx packs which peak at about 7.4 and nominal voltage is generally in teh 6.6-6.8v range, which is basically what a 6v rated servo should be rated for anyway. It's just easier and more simplified wiring and one less thing to fail(regulator). Now sure you assume more risk in a servo dusting off, but given that several known servos tolerate 2s lipos fine, I doubt there is an exponential increase in failure rates just by voltage alone. Heck you can have servos fail at 4.8v too, then what? Then it's just a bad servo, oh well? But if you have a servo fail at 8v it's automatically due to 8v? Wasn't going to fail anyway? My $ is on the latter, but maybe I'll change my tune if I have a rash of servo failures on straight 2s lipos