Ed Cesnalis Posted October 28, 2013 Report Share Posted October 28, 2013 I have to shovel a foot of the 'No real winter' :huh: snow off of my deck so we can grill dinner on the Weber. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 Don't get to hung up on temps. There is no minimum for the Rotax CHT for a reason. If oil temps are 200F and above you're fine. If it dips down below for a flight or two no big deal, but if it stays down under 200F then add your tape. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted October 29, 2013 Report Share Posted October 29, 2013 What is the minimum oil temp for takeoff? My gauge has a red line at about 120 and the green arc starts at 180 I think. It takes forever for the oil to get to 180 if I wait on the ground, probably 30 minutes...I usually start taxiing when it hits 140. It warms up quicker on climb out. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 120 F is all you need for oil temp then you're good to go. temp will climb quick as you take off. Link to comment Share on other sites More sharing options...
Jim Meade Posted October 29, 2013 Report Share Posted October 29, 2013 8.3 of the CTSW POH says 51°C or 124°F for takeoff. It's in the pre-flight instructions. I'm sure Roger is right that 120° is adequate, I'm only pointing out the reference. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted October 29, 2013 Report Share Posted October 29, 2013 Ah great, I've been warming up too long then! Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted October 29, 2013 Report Share Posted October 29, 2013 Above redline is takeoff temp Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 Rotax minimum operating oil temp is 120F and your Dynon is set to 120-121 for the RPM to switch from the yellow to green for anything over 2500 rpm after it hits the 120F mark. I never understood where 124F came from. Had to be a translation or typo because it isn't Rotax and my manual says 120F which matches the Dynon setup. Once I hit 120F I do my run up mag check and then I'm gone. By the time I roll out it is probably 135F+. The rest of the heat comes from climb out. Link to comment Share on other sites More sharing options...
Tom Baker Posted October 29, 2013 Report Share Posted October 29, 2013 I have always heard 50C or 122F. I know that is how the new Savanah that's based here is marked. I just looked and Rotax says 50C and 120F. I think their conversion is off a little. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 120F - 125F it's all the same. It's right in the Rotax Operators manual. Sept. 2012 page 2-5. 5F isn't going to make any difference and by the time you pull out on the runway to take off it will be higher still. Link to comment Share on other sites More sharing options...
Jim Meade Posted October 29, 2013 Report Share Posted October 29, 2013 Well, once everyone gives the reference citation for their number, as I did, then we'll all know where all the numbers come from - except for "my CFI told me". Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted October 29, 2013 Report Share Posted October 29, 2013 CTSW POH: http://documents.fli....com/SW-POH.pdf Min 51°C/124°F BTW: This is a viscosity temp, below which viscosity is deemed to high for take-off. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted October 29, 2013 Report Share Posted October 29, 2013 Yeah, I have definitely been sitting on the ground too long trying to let the oil warm up. 124°F is 51°C, so maybe FD/Rotax just wants the temp *over* 50°C. I wonder though, if 120ish is good enough for takeoff, why do we work to ensure temps up near 200°F in flight? It seems the high power and loading of takeoff would be the most stressful time, anything after that should be fine at the same temp, right? Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted October 29, 2013 Report Share Posted October 29, 2013 There must be at least 2 thresholds, 121 for viscosity, 212 to boil moisture and a normal operating range based on ? Link to comment Share on other sites More sharing options...
Tom Baker Posted October 29, 2013 Report Share Posted October 29, 2013 Well, once everyone gives the reference citation for their number, as I did, then we'll all know where all the numbers come from - except for "my CFI told me". Jim, sorry I didn't quote page and verse for my reply like you did. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 Hi Andy, You would like to see 212F in flight to help get rid of moisture. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted October 29, 2013 Report Share Posted October 29, 2013 Got it, thanks. I was only thinking about lubrication, forgot about moisture dissipation. Link to comment Share on other sites More sharing options...
FredG Posted October 29, 2013 Report Share Posted October 29, 2013 Regarding 212 degrees F in flight... When the oil temperature sensor is 212 degrees F (and displays 212 on the engine instrumentation), is the oil hotter (or cooler) in other locations in the engine? I would think that oil temperature is not exactly constant throughout the entire oil circuit. Just wondering how large the range of oil temperatures is inside the engine while running in steady cruise flight. An indicated temp of 212 may mean some oil is 220 and some is 200, just as an example. Hard to know without measuring. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 Hi Fred, Oil in the tank will be the hottest and oil at the temp sender the coolest. Link to comment Share on other sites More sharing options...
procharger Posted October 29, 2013 Author Report Share Posted October 29, 2013 Well I flew this past weekend air temps were early in 30's later around 50 oil temp stayed at 210, 215 one strip across the top came back next day air temp around 55 still at 210, 215 is there there ever a need for more tape if temps stays in 30's??? Link to comment Share on other sites More sharing options...
Roger Lee Posted October 29, 2013 Report Share Posted October 29, 2013 nope Link to comment Share on other sites More sharing options...
N89WD Posted October 29, 2013 Report Share Posted October 29, 2013 This may have already been covered, but.....the sliding radiator/oil shudder cover is one of the most effective add-ons I've ever done on 9WD. I flew 4 days last week with departing OAT's from 17 - 21 degF. The shudder works like a champ. Instant cabin heat, up to 120 degrees from 70 degrees (reiff) 3 minutes. I keep it steady at 215 deg indicated during in flight ops. great unit! Link to comment Share on other sites More sharing options...
FlyingMonkey Posted October 30, 2013 Report Share Posted October 30, 2013 Don't you have to be experimental to install the shutter? Link to comment Share on other sites More sharing options...
N89WD Posted October 30, 2013 Report Share Posted October 30, 2013 Yea, it works great! I don't think in Georgia it's an issue. Link to comment Share on other sites More sharing options...
mocfly Posted October 30, 2013 Report Share Posted October 30, 2013 Where did you get the shutter? Link to comment Share on other sites More sharing options...
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