A Q to the MA pilots flying the Razor, esc% and HS...

[OICU812]

Hello and good day or evening,

In another thread by Misskimo something came up I need a clarification on in regards to gearing and esc % of what the sponsored pilots are running on the new Razor

On the setups that have been presented and discussed are you guys getting the headspeed of 2175-2200 as mentioned at 75% of the throttle curve on the Jazz esc or is this at 100%? Reason I ask and why it is important in my opinion is on any electric it is nice to have headroom which I think we can all agree on and it has been discussed in detail several times. I did not think to ever ask this until now. The gearing I personally would want would be to have the optimum rpm on the head say 2200, and have my idle 2 or to some known as stunt 2 at 75-80% tops and have my desired headspeed, allowing me to have headroom to allow for the power drop off of the lipo and have a consitent feeling flight.

Now that I have babbled on, can someone from MinAir that has been flying this heli and presenting videos and info please clarifiy if these numbers being brought to us in regards to HS and performance are with that headroom or if that is full out? I need to make the right decision right out of the chute in regards to gearing when ordering. Thx, hope I made sense here, lol. :mrgreen:

[ChrisS]

We have run the Razor both ways, geared for headspeed and governed for headspeed. The key is in the esc, if you use one that has a good govenor (aka the Jazz 55) you can take advantage of over gearing and use a ratio that would give something like 200 rpm more than you would ever use and then pull back the esc to something less than you would normally run it at. So far, this methodology is working well and the little Jazz is hanging tough.

The exact numbers will depend on many things, motor, voltage and desired headspeed. The instructions will detail this.

Chris

[Bert Kammerer]

Agree with Chris. Personally, I always look for throttle head room when running the Jazz 55 in governor mode. The throttle percentage will vary of course depending on gear ratio and motor, and the most efficient gear ratio for a particular motor (even when geared low to allow throttle head room) will yield a totally different throttle percentage to achieve a desired head speed than the most efficient gear ratio for another motor. For example, we've found that the most efficient gear ratio for an Actro 24-4 for hard 3D is 9.6:1, with this you achieve 2200 on the head with approx 85% throttle. The Neu motor on the other hand shines with 18.46:1 at 70% throttle (same head speed).

[OICU812]

That is what I was looking for, the % on the ombos you have show us in videos. Now do you know what he tango ratios and % are? Also anyone other than Tony try 12S on the Razor yet?? Thx

[Clintstone]

I am running a lower HS at 2100 in 2 and 2080 in n and 1. I am running 70 and 75 and have been able to run down to 65 but I feel 70 is the best for me. With 3700 the flight stays the same for 6min while the heli feels very light as compared to the 4350 but the 4350 are nice also with about 8 1/2 min. of flight. Both setups are good and I am running them both at 14.25 to 1.

I will add I can fly 6 flights as fast as you can put batterries in and nothing gets hot.

[WillJames]

I will add I can fly 6 flights as fast as you can put batterries in and nothing gets hot.


That is what I am looking for Clint. Looking forward to the Razor Release!!

[H to the C]

My suggestion is go with the NEU. i CAN FLY FOR 4 TO 4.5 MINUTES WITH NO HEADSPEED DROP OFF.I think the neu is a great choice if your wanting power and longer flights. the 2 key words here are POWER and LONG! My Actro setup only really gives me about 2 minutes of good power before you notice some headspeed drop off.

hc

[OICU812]

Thanks HC, your preference is mine as well, I am willing to sacrifice time for some good grunt.

[misskimo]

hey , yeh the 24-4 is a tad lame , but its got great power , but like I said earlier actro has NUTs , look at the 24-3 setup on that logo 14 on 10s in the videos , thats the motor I was wanting to try , geared 12 to 1 , this dude will rock

[OICU812]

Well if you do try the 24-3 on the Razor Tony let us know, would be interesting to see how much better it would be than the 24-4 on the Razor.

[misskimo]

hey , heres a video of my cousin Karls Ion converted to a 50 for IRCHA 2005 , the motor used was suppose to have been a 24-4 , but for some reason , its a 24-3
http://www.augustoheli.com/videostuff/videoarchive/HelifreakArchive/I/ION50IRCHAHF.wmv
HC remembers this heli , he flew it , the batteries was at its max with the 100% throttle , and geared 9.5 to 1 . forgot what the KV of the 24-3 is , but Im thinking around 700s which will be a headspeed around 25 to 2600 on the head , now if you gear that motor right , she will rock , I bought that heli from Karl, and slapped in my VStabi and converted it back to a 90 with the same motor thinking it was a 24-4 , Clint knows about this heli, thats the one I bumped the headspeed up to 100% and gave him the sticks :shock: , after that flight , that motor came out Couldnt gear it right .
with the Razor geared 12 to 1 and I went with the schulze 32-80 , now that should really work , but I will have to wait till next year :arggg:
so to get the same effect , I will try 12s with the 24-4 in my Razor now geared the same , YYyyyyyeeeeeeeHHHhhhh!!!!!

Tony

[H to the C]

I'll stay 10s

[misskimo]

it is 10S