[wingtipper]

Thanks for the physics lesson Leonardo, I already knew that. My electrical flying philosophy is a little different to yours, and I suppose thats a good think because we both look at power consumption and use from different directions, I do have a tendancy to over power, over ESC and over battery pretty much every thing, but hay I have never had an electrical failure of any sort, but at the end of the day who gives a shit as long as it flys like a champion, hope to catch up down the field this weekend.

I like your insites Gazz and I reckon your setups are reliable, robust, and certainly not lacking in power. I Cant wait to see your new machine fly, I'm definatly going to be down at the field this weekend, I've got all the rello bash stuff out of the way for a while now. Just hoping the weather's nice for us!!

Posted by wingtipper - Today 12:01 AM
AND WHATS IN YOUR BIG PLANE JASON ?

The Yak 55M has a turnigy G160 motor 245KV, the ESC is a TURNIGY K-Force 120A-HV OPTO 5-12S, the Battery is 12S 3000 20-30c made by connecting 2 6S 3000 packs in series. (I use these in my Edge 540, just one at a time) It has a seperate dulesky twin 8A BEC that's powered by 2X2S 850mah Lipo's. That gives me double redundancy for powering the RC link and servos.

The G160 motor is rated for 78A/15sec and for 9-10 Cells. I know I'm exceeding the voltage by running it on 12S but since I reglued all the magnets in, I've had great sucess with it and it's not hot after 5 mins of fairly hard flying. Here's a link to the motor
http://www.hobbyking.com/hobbyking/store...Glow_.html

With a 19X6 light electric wooden prop it pulls 75-80A static. (about 3750W) again this is peek power 10 sec burst only and it will draw less current in the air.
I concidered proping it up slightly, because the motor comes down barely warm, say 'till it pulled 80-85A static (about 4000W).
It flies with such authority as it is, that there's no need.

I carefullychose the set up based on best comprimise I could find between power weight and cost using a 5min flight time with some reserve.

The all up weight is 5.050 Kg which is not bad concidering it's a Super and Cheaper airframe, not nearly as lovely and light as a Sebart. But it is very straight so concidering the price it is still excellent value and a real BUZZ to fly!!


To give you rough idea of the average current draw. my 3000 packs are comming out of the plane after 5 mins at about 3.7-3.8 Volts per cell. If you can assume that they are 70-80 percent discharged at this, then that gives you 2,250 mah in 5 mins (.083 hours) so average current would be in the order of 25-27 Amps.
It is not just floating around too, you've probably noticed that I usually do give it some, when it's in the air.

I will say that it's a bastard to re-glue the magnets in these big motors! It's a 2 person job, the best glue and primer is expencive and hard to get. (I had some luck here) Had I to do it again I would definately buy a better motor!!

great read mate . thanks . i have noticed you give it a lot of stick about 80% of its time in the air . hahah .
i'm working all weekend ( rostered on) . unless i take a sickie . but i have relos down from queensland as well , so i'm better off working .
in how . have fun on the weekend if i dont runnin to you guys . the next 2 weekends ill be rostered off after this one .