4.8V ignition - can I use a 5V regulator ?

[gonzalo38]

I just purchased a Rotomotor 25 engine and the included ignition says that it works with 4.8V.

In all my planes I use Fromeco batteries with regulators for different applications and I want to use a 2.600 - 7.2 battery for the ignition. The idea is to run it through a regulator that will send 5 V in a constant way to the ignition.

When you charge a 4.8V battery to full capacity, you have more than 4.8V for several minutes and ignitions dont have a problem, but I'm not sure if a constant 5V could be a problem.

What do you guys think ? It is such a smal difference that it shouldn't be a problem or should I just go with a normal 4.8V battery to avoid problems ? The reaason for going with a biggger battery is for standarization of my fleet. In that way I don't have to remember in which planes I have different kinds of batteries.

[The Gardener]

Freshly charged 4 cell NiMh will show 5,6 volts, so you can easilly use 5v regulator!
5-5,1 usually is the voltage to stop flying :) or atleast watch voltcheck

[snap a saurus]

Should be fine regulated at 5 volts, a freshly charged 4.8 volts stays above 5 volts for more than few minutes.

[sweetpea]

If in real doubt call the manufacturer. Get it in writing so the warranty is still good.

[gonzalo38]

Guys...... I followed your advice and run the ignition with the 5V regulator. No problems at all.....

The Rotomor 25 is a really nice engine..... very quiet. I installed it in my RV-4 which was equipped before with a Saito 150 because I got tired of glow fuel. Plenty of power and you can't realy notice the extra weight of the engine and an additional battery.

Thanks guys.

[Rick1999]

Sounds great how about some pics. I always liked the RV's

[gonzalo38]

Sounds great how about some pics. I always liked the RV's

This is how the plane was looking when it was equipped with The Saito 150. I don't have pictures of the plane with the Roto 25 yet......

http://img141.imageshack.us/img141/6647/img0011qj8.jpg