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Grayhawk, I will give the rudder a chance next time. Can just not imagine that it will have such a big effect but – I read out of your words that there is nothing wrong with my cooler installation in front of cylinder 2. I did not check engine timing – again – I did it some time ago during building process, assuming that it will not change by itself…. But again – good tip. Thanks, Peter, D-EPSO, 360 MK II Von: Lancair Mailing List [mailto:lml@lancaironline.net] Im Auftrag von Sky2high@aol.com
Gesendet: Dienstag, 11. Juni 2013 15:47
An: lml@lancaironline.net
Betreff: [LML] Re: Groundtesting problems 300 series Lancairs have a very strong left turning tendency (P-factor, weather vaning, etc.). Even the engine mount has the engine canted to the right to compensate. The small rudder does not have much effect below 40 KIAS. Yes, you must tap the right brake often on a take off roll when below 40 KIAS and power must be applied slowly until enough speed is gained for the rudder to be of some help. It is useful to lighten the load on the nose gear as you speed up. There is not much cooling at the lower speeds used in taxi tests. Also, new engines generate more heat from internal friction before break-in. I don't have enough information to comment on your cooling system, but 200F (about 100C) oil temps and close to 400F (about 200C) cyl head temps are not that surprising depending on conditions of hi power, slow speed tests. Have you checked engine timing? Hello friends,
I am in the pre-first-flight phase and suffer some problems. I would
appreciate valuable hints to the following issues:
- being on the runway and pushing the throttle forward I have to constantly
brake on the right side not to leave the runway. Is that "normal" or up to
which extend is the latter tolerable ?
- I have my oil-cooler in front of Zylinder 2 facing downwards. I have a
plenum to seal the incoming air. I placed a small cover over the cooler to
guide the air downwards for cooling purposes. The remaining air is going the
Zylinders 2 and 4. Unfortunately CHTs are still very high (>200 C) and
oil-temperature is after going the runway 4 times up and down (1,5 Km) more
than 100 C. This is definitely to much. Outside temps are appr. 13 C. What I
am doing wrong? Any experience with forward placed coolers ? Recommendations
?
Thanks a lot in advance,
Peter
LNC 360 MKII, O360 F1A6, D-EPSO
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