whats the best optical tach.

[rcdave930]

what brand tach is every one using. my LSH does not stock any. whats the best one to order. at the moment I have just my trex 700 and its mini me :YeaBaby: trex 250 sibling thanks in advance.:thumbup:

[MXRACERX43]

I have this one. http://www.modelavionics.com/skytach.asp Works well and is easy to use. This is the only one I have evr had so I don't have another brand to compare it too. You can find it cheaper through one of there dist. than listed on there website.

[masu]

I'm not sure if others can (I don't even know any others) but at least the MA SkyTach cannot go further than 3190 rpm ("It now has a 3190 max RPM viewing ability.") and I don't think that's enough for the 250 (???). My friend has the SkyTach, I've used it and it works great. Only minus is that it does not have a separate on/off switch.

At the moment though, I'm using a eagletree logger to track my engine rpm in flight (and calculate head speed by ratio)... of course it's not as convenient in a way but the benefit is that it works even when your alone at the field. Costs about the same I think... the SkyTach is really expensive in my opinion. I'm using RevMax sensor for the logger rpm. You can also get a brushless motor rpm "sensor" for your 250. Just a thought...

[MXRACERX43]

I got a tip from another member on here. Keep dropping your RPM on the tach until the blades look still then double the value to read higher headspeeds.