Originally Posted by Dennis C

Do not worry to much about the CG to start. just get it in the ball park.

If you do move things move hardware, you want the tank as close to the CG as possible so that the CG does not change during the flight

Dennis

Thanks Dennis ... Think I am going to move the pull pull servo. Wish I could leave it there but having it in the tail is probably the best. I bet most people would agree to that? Got 3 flights this morning on the extra and the only thing I kept thinking was where is my slick lol. HAving the servo moved back this can help the batteries maybe sit where the pull pull servo is?

Originally Posted by brathanke

You guys are correct about the nominal voltage but the top of the pack is 7.4

i you are correct as well,but it wont stay that high for long

yeah, like less than a minute or two.

Using a specktrum recevier, what is the best way to get backup battery redundancy for the 71" Slick. I have a Fail Safe AR 9100 in my 89 just don't want to put a $200 receiver in this size plane. Also plan on using Tech Aero Ultra IBEC with ignition cutoff.

Originally Posted by Irg

yeah, like less than a minute or two.

Fair enough but if the servos aren't rated for high voltage is it not enough of a difference to matter? I don't know everything about this so please enlighten me.

Ok felt sad to cut the pull pull set up... So 3DHS set up and life lol... But I have the servo in the tail and it feels more comfurtable for the cg... More places for the batteries

I just stuck 2 ounces of lead to the back of the servos today to get the gasser to balance and it has two tail servos....that os gt33 is a hog!

Originally Posted by going4speed

I just stuck 2 ounces of lead to the back of the servos today to get the gasser to balance and it has two tail servos....that os gt33 is a hog!

I am fealing the hog... I got a post to mr smith to find out how they mthotically figured out the GT33 .. They have been busy with the K50 but hopefully we might get a post with a pic how this should run.. If not we find fun places for the batteries

I'd love to see the Smith's set up also.

Originally Posted by goflyhighrc

Using a specktrum recevier, what is the best way to get backup battery redundancy for the 71" Slick. I have a Fail Safe AR 9100 in my 89 just don't want to put a $200 receiver in this size plane. Also plan on using Tech Aero Ultra IBEC with ignition cutoff.

We use two 1100 a123's with a smart-fly batt share and 2 JR switches. use about 80mah/flight The batt share will draw the two packs equally

Originally Posted by brathanke

Fair enough but if the servos aren't rated for high voltage is it not enough of a difference to matter? I don't know everything about this so please enlighten me.

many servos that are good for 6v will be ok on life, but check to make sure.

hv usually denotes at least capable of 7.4v, nominal 2s voltage. but many hv servos can be runner higher, like my 7955s at 8v.

I didn't have to add any lead. I simply put two 2000mah life packs under the turtle deck (like many other gassers on this thread), and it balanced out slightly tail heavy at stock cg. Two servos in tail, rudder & elevator. Moved ignition and everything as far back as possible. No spinner, no lead.

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Originally Posted by Irg

many servos that are good for 6v will be ok on life, but check to make sure.

hv usually denotes at least capable of 7.4v, nominal 2s voltage. but many hv servos can be runner higher, like my 7955s at 8v.

Thanks for the clarification

Originally Posted by Irg

many servos that are good for 6v will be ok on life, but check to make sure.

hv usually denotes at least capable of 7.4v, nominal 2s voltage. but many hv servos can be runner higher, like my 7955s at 8v.

HV denotes that it can run on a 2S LiPo unregulated which is 7.4 nominal and 8.4v max.

HS7955's aren't actually marketed as HV rated servos but consumers have proven that they are capable of handling 2S LiPo power unregulated.

LiFe is 6.6v nominal and I'm not sure what it maxes out at but it settles back down to around 6.6v pretty quickly and stays there until it's dead. I've been running my HS985MG's on unregulated A123 without issue. Actually, I normally set my BEC's to 6.5 or 6.6volts on most all of my servos except my 7955's which I run at 2S LiPo unregulated.