I'm feeling a bit sheepish about having a dry sump engine!!! (although conceding that these have their own set of probs)
Rgds PhilB. P.S. Those who haven't yet seen or Morning Glory 07 photos please see: www.pacificsoaring.com.au ->Photo Gallery P.P.S. I believe that several Super Dimonas are available in the U.S. at very attractive prices at the moment - given the exchange rate. ----- Original Message ----- From: Nigel Baker To: [email protected] Sent: Wednesday, February 20, 2008 5:26 PM Subject: Re: [DOG mailing list] Fwd: Never overfill oil or it could run 15deg HOTTER!!! Hi All. Yes Ian, the same applies to the L2000. Besides higher temps you also lose a little horsepower. Thrashing the excess oil around with the big ends causes friction. That generates heat. Heat is energy and that comes from the engine so less power to the prop. In the Dimona the mid way point between the 2 lines is the top position for the oil. If you put the correct amount of oil in as per the Limbach Manual when yo do an oil change and check the dipstick afterwoods tis will show the correct spot on the dipstick. If you lift the tail till into cruise attitude (engine level) you will then find the oil sits at the top line on the dipstick. Thus many pilots tend to want to overfill the thing thinking it should be filled to the top line. Hope that made sense. Cheers. Nige. ----- Original Message ----- From: Ian Mc Phee To: DOG LIST Sent: Tuesday, February 19, 2008 11:11 PM Subject: [DOG mailing list] Fwd: Never overfill oil or it could run 15deg HOTTER!!! I got a phone call today from Chris Kiehn RAAus and he alerted me to to service bul and Jabby chat end of January and among other things I thought it interesting if you keep oil near bottom mark oil temp can run 15deg C lower than running at just above full mark. Newer Jabirus have a deeper sump which do not have the same problem. I gather if oil is near full mark oil gets churned up by crankshaft/pushrods and thus engine runs much hotter. Who would have thought it!! I was told similar applies to VW transporter engine but not sure about L2000. Anybody know? Ian M The paste is below Engine oil level has a strong effect on oil temperatures. For all engines, the lowest oil temperatures are achieved when the oil level is set on the lower dipstick mark. Generally, this oil level is suitable for circuits or flights up to 3 hours duration. Note that testing has shown that setting the oil level slightly above the upper dipstick mark (i.e. slightly "over-full") can result in oil temperatures 15°C higher than when set at the lower mark. Figure 5 shows the length of the Jabiru 3300 dipstick. CAUTION This applies to all Jabiru 3300 engines and to Jabiru 2200 engines prior to S/No. 22A- 2440. HOWEVER, more recent Jabiru 2200 engines (S/No. 2440 onwards) have a different sump (easily identified by it's lack of fins). Setting the oil level on the lower mark in these engines will give oil levels lower than is optimal. __________ NOD32 2758 (20071231) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com
