Howdy folks. I'm not new to gasses, just new to telemetry. Was wondering about what most gasses run at. I'm running a 46 CC Brillelli and just hooked up a telemetry module. I've only tested on the ground, but it was as high as 270 F. And at shut down it spiked up to 350. Is this too high?

Where are you monitoring the temperature?. The intake could be near freezing while the exhaust will char wood.

Right now it's towards the top of the cylinder. I'm sure close to the hottest part. I'm also noticing now how close it is to the exhaust. It's the red you see going around the jug. Where is the best place, and what are some good temps to look for? Thanks for the help by the way.

Drop the temp sensor towards the plug by two fins, that will put it in the combustion chamber area. I like my temps to run between 200-250°, but prefer closer to 200°.

Thanks Robert. I'll try that and report back.

Yep. And fly it; it will be fine. I use 300 for an absolute max myself, though 350 probably wouldn't hurt the engine. As mentioned, 200 to 250 is a nice place to be. Put the sensing part on the rear of the cylinder up near the head. You can hold it in place with a piece of silicon tubing. (Not Tygon or other gas tubing.)

AV8TOR

Alright so, not a Hugh difference. It's at 220 at WOT, 250 to 260 at idle, and at shut down it spikes to 340 but drops pretty quick. Sound normal? That's also on the ground. Should run a little cooler in the air I'm sure.

Thanks for the info guys.

Yeah, most any engine will spike temps when first shut down. The heat is still there, but the cooling airflow is not. You can even notice this phenomenon on car engines. And yes, it will definitely run cooler in the air. If it doesn't, revise your airflow/cooling setup with the cowl on.

AV8TOR

Will do.

Most definitely cooler in the air. I have found that I am way to rich by way of ground tuning once they get airborn. But that works out well and I would not recommend tuning for only flight temps. A DLE 55 was the first of my Tele experiences, on the ground, properly tuned, it was running 230°, but as soon as the wheels left the ground it came down and ran pretty consistently around 190°. With the exception of a chopped throttle, the longer at idle the higher the temp went, back on throttle and down it came. A really cool thing to watch especially with rpm, airspeed, and throttle position. I record mine and watch on the ground, after the fact, watching in flight is like texting while driving. Don't do it!!

I hear ya. I had it installed in another plane last year, but didn't look at it too much. What I like is the alarm that starts going off if my pack drops to a specified voltage. But I do also check out the data logger after landing. Pretty neat. I don't have rpm or airspeed or anything but I may get some more sensors for it.

I bought all the extra sensors for the Eagle. I really want to keep an eye on it with the expense and all. Also have the batteries being monitored as well as the loading for the power distribution board. All my other airframes get the temp checks for the first few flights and then it is removed for the next one. It is really cool to be able to see how everything is doing, and comforting.

If I had the kind of money tied up in a plane as you do, I'd have two of every sensor on it. Don't blame ya there.

I use the HiTec Aurora 9 with Telemetry (4 sets.) No problem watching while I fly. even have turned it on and paged to different pages while in the air.I bought a large Electric terminal and filed it till I had a tight press fit on the spark plug. Full scale planes use a special plug washer with a coax lead to the cylinder head tempon older engines like the 0-300 continual. newer engine monitors have special plugs that tape right into the cylinder head. Any way my set up runs from 190 to 220 till shut down then it climes for a bit. What's neat about the HiTec is the HSS NAVI I can plug into a USB on my computer and record every sensor for play back ...It can even be played back with the back round of Google Earth and U can watch it from any angle below, above, left or Right side. I often put a GPS Ari Speed set up in a Bomb and attach it to other peoples air planes that have th war birds with a bomb drop. and I can watch their sir speed, GPS altitude and GPS ground speed. I even record it with the NAVI and can play it back.What I want to do is video the plane and sink the video to a video of the computer screen showing the different read outs on the same screen by Picture in Picture. Someday when i get Round-To-It.

I do all the same with the Eagle tree logger. And I have a camera to record the forward flight as well, just to do what you are saying. See what the numbers are as to relation of flight. I have the GPS because I want to know how far beyond my flying field I venture. We all know we have no clue as to how far away or how high we actually fly. I'm just curious on those attributes.

Me too. I'd love to know the real numbers, not just what I guess they are.

One of our new members lost his apprentice pretty much straight from the middle of the field. We are surrounded on all
4 sides with 10' corn so thick that when U fly over it and video it U can not see the ground straight down in most places.
But U know 9 out of 10 times it's a lot farther out than U think.

I did the maiden today. It actually ran much cooler than I thought it would. The data logger recorded a max temp of 270 but that was only after shutting down. In flight was steady at around 190 F. Probably a little more on approach.

Congratulation's on the maiden. And there ya go!

Thanks Robert. I put a few more flights on it today and every time I thought to look it was actually only between 115 and 130 so I guess I have plenty of cooling air through the cowling.

Outstanding, you'll have a long lasting affair with that airframe, especially the engine.

That's what I'm hoping for.

Well, it's not quite the maiden, but one of the first flights. Very un eventfull. Just a few patterns.
http://youtu.be/9IeCG-V4TYw

Nice. Looks great, sounds great. And wow, all that grass!! That would be so nice. Here in Arizona it's just brown for as far as the eye can see. Well, not in the mountainous parts, but no grass anywhere around Tucson or Phoenix that's for sure! It's so hot here the engine in my car overheated while it was parked and not running. I had to start the car up to cool the engine down! (just kidding...)

AV8TOR