37% Ultimates

[luv2flyguy]

Sweet deal for 649.00 for the airframe !!! I don't think you can find anymore plane on the market for that price and as I understand the quality is first class. May be one of RC's best kept secerts, just a sleeper I guess.

[Bat Fastard]

	Quote: Originally Posted by Ken-H
	Hi BF, Mine has a ZDZ and I hardly even baffle it. I live here on the NW coast and temps barely get above 70. I had it in Vegas at a 100 degrees last year however with no issues there as well. I just took some depron and placed it in the bottom inlet of the cowl to make sure air does not dive under the motor going in. I've flown others with the BME 110 and it was insanely powerful compared with the ZDZ I have in mine. I would suggest if you've already tried to rich-en it up and have baffled it, send it in to BME for service. Sounds like a motor issue. Ken

My engine runs great, no complaint there. The cooling issue is a bit different tho. I never thought baffeling was absolutly critical until I installed an Eagle Tree data telemetry system and saw what was actually going on. When I saw the CHT's rising close to the 340 degree mark during a hover that lasted only about 20-30 seconds, I thought that there should be some way to avoid this high of reading. I then installed a much tighter baffle system, to the best of my understanding in an effort to cool it. It worked, but only to a small increase in cooling capacity. After that I was able to harrier for about 10seconds, transition into a hover and see yet again the CHT's get close to 340 degrees in about 20-30seconds. Normal flying is fine for cooling and it cools off the quickest at full throttle in level flight.

I dont want to cook my engine that runs great and doesnt have a place of service at this time. Just wondering how you were able to keep your engine cool enough to prevent damage.

BF

[sweetpea]

	Quote: Originally Posted by dgiordano
	Sure thing sweetpea, I am going flying monday weather permitting and sunday I will have the cowl off, I will take some pictures then.

Give me a look inside the fuse also......I'd like to start planning my layout of gear.

[krayzc]

i think that is a good deal on the ultimate and I always have liked seeing or hearing about this bird even though i do not have this one.....

[Ken-H]

	Quote: Originally Posted by Bat Fastard
	My engine runs great, no complaint there. The cooling issue is a bit different tho. I never thought baffeling was absolutly critical until I installed an Eagle Tree data telemetry system and saw what was actually going on. When I saw the CHT's rising close to the 340 degree mark during a hover that lasted only about 20-30 seconds, I thought that there should be some way to avoid this high of reading. I then installed a much tighter baffle system, to the best of my understanding in an effort to cool it. It worked, but only to a small increase in cooling capacity. After that I was able to harrier for about 10seconds, transition into a hover and see yet again the CHT's get close to 340 degrees in about 20-30seconds. Normal flying is fine for cooling and it cools off the quickest at full throttle in level flight. I dont want to cook my engine that runs great and doesn't have a place of service at this time. Just wondering how you were able to keep your engine cool enough to prevent damage. BF

Hi BF,

Sorry your having these overheating problems. I do not have an on board temp monitor so temps in flight and hovering are unknown to me. What prop are you running on that motor? Perhaps it's loading up the motor and getting hot. I know temps in the mid 200's are not uncommon upon landing so higher temps while hovering will be higher.

Ken

[Bat Fastard]

After talking to a local aircraft mechanic about cooling etc., he suggested that the slant on the bottom of the cowl might be preventing hot air from leaving the cowl instead of helping. When it's in a harrier the slant isn't a slant at all. Its a effective scoop for air to enter at high AOA or at least block the airflow "thru" the cowl for cooling. He suggested a few things such as a servo operated "flap" to reverse the airflow when at high AOA however, none of his options seem possible.

About the "overheating" issue, I'm not exactly sure at what temp is considered overheating. The engine has always run perfectly. Even at the 320-330 degree range. The only way I know its hot, is from the Eagle Tree system. Perhaps not knowing whats going on is better than trying to resolve a problem that may not be that much of a problem at all. I'm going to try to make a fiberglass, two piece duct, molded to the engines cylinders, after cutting the cowl in half, to see if that will help. If it doesnt, I'll be able to tell everyone at what temp a BME will self dectruct. LOL

As you stated before, The engine has incredible power in this airframe, and it flys great. I would just like to find a way to make it (the engine) last.

BF

[dgiordano]

hey sweetpea I got rained out on monday, but when I get into it I will post some pictures.Darn that rain!!

[JohnVH]

I have a DA100 in mine with no baffles, come to think of it, Ive never baffled a plane yet, but it doesnt get as hot as some other area's here.

[harv]

hey john, what prop you swinging on that ultimate, and how do you like it?



harv

[JohnVH]

	Quote: Originally Posted by harv
	hey john, what prop you swinging on that ultimate, and how do you like it? harv

Hey! Sorry for the late reply, I had the notifications turned off so I didnt know you asked a question. I have a PAU/BME 28x10 prop on my DA100, I put 28x10's on all my 100's. It works awesome, motor is happy, so Im happy, Ive used a few different of their props on my 50cc and my 150cc birds and I love them, best wood props Ive used so far. Hope that helps

[krayzc]

John what makes this prop line up stand out in your mind? I have never tried this brand.

[harv]

	Quote: Originally Posted by JohnVH
	Hey! Sorry for the late reply, I had the notifications turned off so I didnt know you asked a question. I have a PAU/BME 28x10 prop on my DA100, I put 28x10's on all my 100's. It works awesome, motor is happy, so Im happy, Ive used a few different of their props on my 50cc and my 150cc birds and I love them, best wood props Ive used so far. Hope that helps

hows the sound with that prop. (im trying to find a prop for my 106 QS)


harv