Holmatas

Hi Guys,
I have a TP 10 petrol engine that I wish to fit into a 40” balsa plane.
I have the engine, I have a 2200mah 2S battery to power the spektrum receiver, but am unsure of what I need to have for powering the Ignition for engine ?
Can the Ignition and receiver run off the same battery?
This is my first Gas/Petrol conversion , any help on this appreciated
Cheers Mark​​​​​​

tedsander

Well, they can. But is not advised. All too easy for ignition noise to follow the wiring to the receiver, which results in loss of control.
To be really safe, use a second battery, and keep all engine related items as far away from the flight electronics as is possible. In the old days, that even meant no metal pushrods from throttle servo to the throttle, etc.
That noted, most 2.4 systems are better at noise rejection than the old 72 systems. Not bullet proof, but better.
Many of us use an IBEC from Tech-Aero https://www.tech-aero.net/ultra-ibec to power the ignition from the single on board battery, and to prevent noise leakage. There are other isolating type switches available, but none are near as dependable. I use it in all my ignition planes.
BTW - a 2200 battery will be massive capacity for the size plane you are using it in. For weight savings you may want to go smaller. Worst case on a really long flying day, you top off the pack at the field, since they can be charged so quickly.
I'd advise using LiFe chemistry, but otherwise make sure your ignition module (as well as all the other components) can handle the higher voltage of LiPo's. Some can't, and it's bad to let the smoke out....

Holmatas

Thanks Ted
the battery was recommended by the local hobby shop , it is a Life type.
The Tech aero IBec seems to be hard to find, unavailable from the link you sent.
I would like to just have the one battery if possible as I am limited to space, access is via removing the wing as well.
cheers Mark

speedracerntrixie

My Feedback: (29)

I’ve never seen a Tech Aero IBEC create an issue to date. Many guys I fly with use them and I have 3 airplanes with them installed. Highly recommend. I agree that for your size model that 2200 mah battery is too large. 1100 to 1300 would be much better. Smaller airplanes need to be kept as light as possible.

tedsander

Odd, I was able to get to the point of entering my credit card to order one, and didn't see anything about availability. Web site is old, and not recently updated. Perhaps an email to their "contact us" link.

FYI - I have a 72" gasser running 5 high torque (but not high voltage) servos and an RCexl ignition. Currently 2 2200 LiFe batteries. But I started tracking usage last year, and found that 2 hrs of flight time would need to put back 1200-1400mah, so one of those packs is coming out That's 8-10 flights, depending on how much gas you can carry. Thinking I might even cut back to one of my 1100 packs, and then just recharge after 4 flights. The ones I have state that they can be charged up to 4C (!) , but I don't usually push them to that when charging - 1C (1 hr) is fine. And yours may or may not support that - so follow whatever the manufacturer recommends.

Holmatas

Thanks everyone
I have emailed Tech aero regarding postage to Australia.
Have alsolooked at smaller LiFe batteries, 1450 mah is available but is longer !
thanks again !

speedracerntrixie

My Feedback: (29)

Look up the web site for DA Australia, I have a feeling they carry the Tech Aero IBEC.

tedsander

No go on DA Australia, but Boomarc appears to have it: https://www.boomarc.com/en/ultra-ibe...y-techaero-usa

Interesting that their smaller 1700 LiFe packs are only about 1/3 oz lighter than their 2100 packs! You might want to put the one you have on a scale.

Holmatas

Booma rc was the go ,
Techaero arrived today.