aaahaaa ............ it was right here !

For the first flight of the day I will warm up just above idle for about one minute and go to full full throttle to make sure I can and then preflight, up/down/right/left/taxi and up and away.

The Pamster

Full scale pilots do?A manditory check of many things. Just making sure everything is good to go!

Most who have flown on large commercial planes probably have noticed there is no full throttle run-up. As far as full throttle run-ups on my gas models, for the first flight of the day, I warm it up, do one quick burst to full song, taxi out and let her rip. The rest of the day it's just crank, taxi out and go.

One thought for those who are concerned they "might" forget something that was changed - Make and use a checklist. It will help keep the birds in one piece much longer. Been doing it for many many years. If you notice something you have trouble remembering, add it to the list.

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lol, been to a few fly-ins where the "full throttle runup" never ends the whole flightno worries about twitchy throttle servos. You'd think you were at a pylon race...

The latest versions of pylon race engines have no throttle, just a needle to richen the mixture...Starts are full throttle, rich..After a race the mixture is richened for a lap or 2 way up high, then the engine is shut off and the plane is landed dead stick....

A true go-no go engine

i run my up my engine to full throttle and give a **** what anyone thinks....as a matter of fact everyone i fly with does the same... what are we trying to prove by not?

I believe it's an ignorance thing. That's the only way I can explain it.

I do not understand why anyone would not want to determine before take off if everything they had was functioning the way it should. Also being a full scale and UAV pilot, I understand the importance of a full power run up as part of the pre-flight procedure. Yes, full scale does full power run up's too. In most light singles and twins full power is used for the mag and propeller cycling checks. One never, ever, takes off without knowing that all is functioning as it should be.

There's an old saying about runway behind you, blue sky above you, and fuel left in the pumps. All are useless when things get down and dirty. One might add available power to that list and not be off the mark. If you don't have the power you comitted to an activity while increasing your odds of failure.

TOM...most of the replies are in favor of clearing the engine out a bit.....and I definitly would say most are not ignorant. Hey, just set back and let people state what they like to do....without being critiical of them. You have had great words of wisdom...see if you can get back to that mode if you can. Regards Capt,n

So we do have another item to wildly disagree about! ... after best oil, best engine brand, best prop brand, best car, best beer....etc.

My opinion is that many of the large gas engines are prone to overheat if prolonged full-throttle run-ups are done on the ground. Proper cooling only occurs when the airframe is moving through the air.

To each their own.

Bliksem

John, you don't want to hear what I'd like to say to you, but do understand my reply was referencing the original post, and those that have a similar question. Those most certainly do stem from ignorance.

scream that baby, a 2st is a 2st, let them scream, they love it, but warm it up first, I damaged a G23 in a boat because I didn't warm it up

NO it is not even with a "well tuned" glow engine. People do it because they want to. Unless they are power tuning their inflight mixture control (whats that?).

Edited

On my gassers I just run them up to know my linkages are still functioning correctly, and to clear out any loading up (rare).
However ([8D]), when the tuneaholic can't tune their eng glow boys show up, I might run my loudest gassers just to drown them out.

When they get airborne and flame out, there's sometimes a tear shed.[&o]

Oh how I hate those types, always fiddling with their engines but never able to get it right, but always coming over to tell you that yours which is running perfect has a slight miss ..... saying "Listen just there, can't you hear it", just burns my balls [:@]

Karol

TOM, It would seem too me you would need to jam it too full power for a second or two to check for that "crisp" throttle response you talk about. Of coarse it is always important to restrain the aircraft when doing so.

If you just start your engine and take off yourself....just say thats what you like to do. Right. Capt,n

Our club's (glow)eng wizard would tune their glows for them, then they'd fly & decide to tune again themselves,
resulting in surging & flameouts to no end. One guy who did so was a retiree that used to sell real estate, had ZERO
eng knowledge, and proceeded to seize up a good OS .65ax in about 15 flights!

Another tuned his glow so much one morning, he forgot to re-fuel. Took of and crashed from a dead stick on take off.

I've created a set of scoring cards just for them, which a couple of us hold up like in the Olympics.
Most get a laugh, eng tweakers give the one finger salute.[sm=72_72.gif]

Once tuned most gassers require no further corrective action for day to day. However, many engines have an engine installed with the spark plug at the lowest point in the engine, others, have a downwards slanted plug, and others have an outwardly direction plug. All of those capture residual oil and fules from the last run. Some sit for extended periods of time after the last run. Unless you change plugs every run the only way to clear those residuals is to get the engine hot enough to burn them clear. A partial power run may not generate enough combustion energy to clear residuals from the engine.

Never, ever, take off with a cold engine for the life of your plane will then be greatly jeapordized.

However, most of us who have flown multi-engine turbine aircraft from the front seat know that there is a full throttle run up prior to take-off. Posit and hold, full throttle, check the gauges, confirm the numbers, now you can start the roll.

I have been on flights where there was no run up, just taxi right out onto the runway and full throttle. Mostly at smaller airports with little or no wait time before takeoff.

Yes i run mine up, mostly just on the first start of the day. Start it , idle for a while to get it warm first then open it to WOT. not prolonged periodsjust a check - a couple of reasons, i like to know it is properly warmed up and that full throttle is - well - full throttle.I am not worried about settings, rather about checking that the fuel supply is as it should be. I would far rather hear myengine sag while on the ground, than find that out in the air. And again its not settings for me that will make it sag. If you have somehow developed a leak somewhere or the carb is slighlty blocked with dirtetc etc etc the engine will lean out. listen for it on the ground and action can be taken before the engine finds out the hard way.

For me its simple - set needles and fly, the minute i get sagging or leaning - something has gone wrong and its time to strip and do some checks......

Yes I'm gulity as charged, I'll run my engine up for a second or 2 then back to an Idle and check all my surfaces just prior to take -off