35cc setup

Revy

K, letsgo!!
It’s been a while since I set up a new plane. Here’s the shopping list,

78” Pilot Hamilton Edge 540 V3,
DLE35RA,
Fiji style fuel tank,
single LiFe 1700 mah,
Hitec D645MW control surfaces, Hitec D625MW for throttle duty.

Anything wrong here? Any suggestions before I pull the credit card out?
 

calypso

Well-Known Member
LiFe's are a little tricky for power. It's hard to check their charge percentage since they pretty much maintain their 6.6v up until they run out of juice. LiPo voltages drop more during usage and it's easier to check their charge level. That said, I have used LiFe without problems. I charged them after every flight until I got confidence about how many mah I was drawing each flight. It looks like your servos are rated for the voltage from 2s lipos.
 

Revy

K, letsgo!!
I used a pair of 2000mah lipo Spektrum rx packs I’m my 87” S’nach before with 7955’s. I suppose I can do that again albeit a single pack. I was just thinking about using the newer chemistry and I didn’t know about the cliff dive voltage drop. Thanks calypso.
 
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kwilson

Gold Member
Not sure if it is just a financial thing, but those servos are very slow by today's standards. I have never seen those exact servos in action, but the predecessor had terrible centering also. It is an analog, brushed servo and does not have even a coreless motor. You don't necessarily need to spend the money on brushless (which are awesome) but at lease go with the coreless digital if at all possible. You will be much happier over the long run.
 

Tseres

Whiny Old Man
I've been using these in my 30 to 120cc planes. The price is right and have not had any problems in the last 4 yrs. I use 2 batteries connected to the receiver and running an IBEC for the ignition. I've had the IBEC burn out twice on different plane in the last 8 yrs since I've started using them them.. Also use the same setup in my scale planes. Batts are out of stock at the moment. they are usualy not out of stock for long. I'm going to order 4 when they come in. I replace them after 3 seasons. It's time for two of the planes. :)

https://www.buddyrc.com/glacier-2100mah-2s-6-6v-life-receiver-battery.html
 

Tseres

Whiny Old Man
I don't think your choice of servos is the right one. If you want to Stay with Hitec. The 5685 or new equivelant would be a better choice. The ones you picked are better for warbirds not aerobatics.

I used Savox 1258 on the Elevator and Aileron. For their speed and for power. That is all you need there. For Throttle I used a Savox 1257. This has more speed and less power. Perfect for throttle. For ruder I used a Savox 1232. this has way to much power for a 35 cc but I guarantee no blow back on a knifedge loop. These servos will work great for hard core 3D and precision.

I'm sure other people have other ideas. This worked great for me.
 

Revy

K, letsgo!!
The D645MW's were the budget friendly additions. At 13kg (180oz) they are on the low side of what will work. They are a digital version of the predecessor analog I've used in my CG Ultimate without issue, but that was years ago. Today's choices is a little overwhelming. Always been a Hitec guy.

Digital and coreless....there goes the budget. Savox? I got one of those for throttle duty on my profile. The Pilot servos look like re-branded Savox. Hmmm.... :cool:
 

kwilson

Gold Member
Savox 1230 and 1231sg are an excellent budget servo with MUCH better performance. I have several years of personal experience with these and recommend them.
 

Revy

K, letsgo!!
Beauty! I got my shopping list...

Savox 1258 ele/ail
Savox 1231 rudder (don't see a 1232 on my shops websites)
Savox 1257 throttle

I guess I'll be safe with Spektrum's 2200 mah LiFe now. 1700 might not be enough. Just have to check it after each flight as instructed.
 

kwilson

Gold Member
I really like savox. Quality servo at comparatively budget prices. I started using the 2290’s last year and couldn’t be happier. They have monster torque, center very well, have slow start, and are considerably less expensive than the futaba’s. Especially when purchasing 8 at a time!
 
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Revy

K, letsgo!!
Next...electrical power. Planning on running one LiFe 2200mAh and wired into two switches. One to the opto kill and one to the Rx. Will it work?
 

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Revy

K, letsgo!!
I am told elsewhere that I can get interference through the switch and then through to the Rx. Saving a few oz and bucks isn't worth it I figure...dual battery set up now. Getting a bit on the big side to fart around I suppose. My 20cc is about as big as I'll go with a single battery with IBEC.
 
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