21 replies to this topic

[M J W J]

Whenever me and my dad leave an engine for a bit in a plane, we disconnect it from the tank and run it dry. This way it burns off all the fuel and so doesn't leave the oily mess inside.

 

I see it often on the airfield on the weekend. People adjust their jets to richen the mixer and then lean it off again a bit later. All they have done is pushed a load of fuel through the carb clearing it of any left over oil from the last time and then have had to put the mixture back to where it should be. If they had just blown it through with a length of pipe then they could have saved themselves some trouble.

 

I put my money on it being dirt in the carb. No. 1 cause of model engine problems.

[Deathrow]

Just for clarity and to avoid headaches. It's not possible to adjust engine idle on your transmitter, that's your throttle trim and it won't solve your problem if your idle is wrong.

There are literally hundreds of great guides to tuning your car well. Get it right and it'll reward you with great performance and long life. Get it wrong and it'll perform terribly and fail quickly.

 

I've got an original Savage SS with more mods than I can even remember doing in the cellar. Still running the Dynamite Mach .26 i put in it when I built it. Original piston and sleeve has about 6 gallons through it now and still runs strong.

 

I keep meaning to get it back out, maybe when the weather is warmer. It's a real shame parts are so expensive.

[666junky]

we need to bring them all to a show!

[M J W J]

People say to me all the time that my RC planes must be expensive. I tell them no and that's why I fly planes instead of race cars. RC planes are generally cheaper to buy/build and cheaper to maintain in the long run. You do need to pay for BMFA insurance every year and learn to fly properly but the savings in them more than offset these costs.

 

With model engines, if you put the throttle on suddenly and it bogs down then gets going it is too rich on the idle screw. If it cuts out suddenly then its too lean on the idle screw. If its too lean then its usually a sign of dirt blocking it.

 

Once you engine is set up to peak performance set it a click rich on the top end. This will ensure that it has enough oil and doesn't over heat.

[Deathrow]

Do you mean the low speed needle rather than the idle screw?

The idle screw can't adjust mixture.

Not trying to be picky, these are just some of the areas where I've seen confusion arise over the years.

[666junky]

http://www.maxbashing.com/

 

Have a browse on there and the forum, plenty of people wanting to help out.

Ive never ever had a blocked carb on mine, I have an inline filter which has prevented it happening :)

[will_]

I've got a hpi savage 25. It's got a 4.6?? Engine I think, been years since I run it. Got loads of bits & bobs on it, but these days we use (if we get time) hpi baja, or some others, they belong to my boss. He's got around £10k in models. Meh