Trex 450 Throttle settings

[mgjackson]

I put a posting up about pitch curves the other day, so anyone should have seen this one comming

Upto now I've had the Normal mode set up as per the book, ie
PC -2,5,10, TC 0, 48.5, 76, 90, 100

Works ok, and I get a 6 minute run with 20% of the battery running.

I changed the pitch curve to be -2,0,10 but left the TC the same.
Obviously the revs went up....there really is an iphone app for everything and HeliTach read 3010 rpm. This made the model somewhat lively - I wouldn't be comftable practising my nose in hovering like that, but interestingly 6 minutes completly flattened the battery. I was expecting the battery life to go up as the motor would be doing less work.

I wound the throttle settings down by 15% - to 0, 35, 60, 75, 85 and the model became more managable, and the battery life went back up to 6 minutes only using 80%

Thats ok, and a quick surf on t'internet, that seems to be not untypical settings, but if I have idle 1 set to 100,95,90,95,100 won't there be a harsh jump between the two?

Thanks,

[Birdie4x4]

Finles bob recomends a 5 point throttle curve of N 0-50-80-90-100
This is what I use also.

[Made2Fade]

Finles bob recomends a 5 point throttle curve of N 0-50-80-90-100

so would i

[Birdie4x4]

so would i

Enough said then!

[mgjackson]

Well, its what I tried, and stepping through to idle up it would be fine, but not so sure how good an idea it is for indoor/low level practice stuff.

[Made2Fade]

change your motor pinion then
what size you currently using? Up the throttle curve and down the pinion
This will make your motor/ESC/Lipos run more efficient.

[sacko]

Max it out, dial in expo and reduce your swash values.

[mgjackson]

The pinion is 14T, which is what was in the box.

[mgjackson]

>Max it out, dial in expo and reduce your swash values.
Is that on expo Elevator and Aleron? Being numpty

[Made2Fade]

id suggest going to a 13 tooth pinion and also a small amount of expo on the cyclics (aileron/elevator). You'll want + expo going off the TXs in your signature

[sacko]

I normally have 15% expo on Aileron and Elevator and 10% on Rudder. Personal preference though.

[mgjackson]

id suggest going to a 13 tooth pinion and also a small amount of expo on the cyclics (aileron/elevator). You'll want + expo going off the TXs in your signature

Thanks, I'll try that. I guess the lower tooth count means a slower head speed and a little less stress on the motor and battery.

Its the multi heli transmitter thing that kind of got me going on this - ideally they need to be set the same, but the JR is a lot posher than the Spectrum and has more flight modes.

NB, The DX6i and the Sport are out in Luxembourg to give me something to play with when I'm out there.

[mgjackson]

I normally have 15% expo on Aileron and Elevator and 10% on Rudder. Personal preference though.

Ok, I'll give that a try as well...not tried expo, although do have dual rates set up, but never actually used them.

[Made2Fade]

Try the +15% expo on your cyclics like Sacko says and then put the 13 tooth pinion on. This will allow you to push the throttle curve up and will improve the helis feel and your gear will run more efficiently. It will also put you in the powerband better in case you need to get out of trouble quickly. Kinda best of both worlds i suppose. Myself i prefer not to use expo on the rudder but at the end of the day its all down to personal preference. Go with how you like it too feel and not how we like it.