Is this normal for a DA-85

Is this normal for a DA-85
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Is this normal for a DA-85 - 7/22/2008 2:17:56 PM

MR G

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Joined: 12/20/2002
From: San Antonio, TX, USA
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I could not find the DA support forum so I will post here.

I have a new DA-85, I am using a XOAR 26X10.

The engine is very new and has only about 25-30 min runtime on it.
I can only get about 6000 rpm out of it right now. It will idle as low as 1700 reliable.
I can idle lower but it does not sound reliable any lower than 1700.

I thought I would get about 6700-6900 at full power.
Maybe it needs more breakin time before those rpm's will be realized. What do you guys think??

It has tons of power and I am quite happy with it, just thought I would get more out of it.

Thanks for any replys

MR G

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Post #: 1

RE: Is this normal for a DA-85 - 7/22/2008 2:25:51 PM

krayzc-RCU

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Joined: 3/26/2002
From: Kannapolis, NC, USA
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put a mejzlik on it to let it spin up if you are at the max that can be acheived on that prop by your needle adjustment so that she'll break on it like DA like above 6200 RPM.

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Post #: 2

RE: Is this normal for a DA-85 - 7/22/2008 2:29:49 PM

Ih82crash

Posts: 176
Joined: 12/24/2005
From: Elko, NV, USA
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Had the same problem until prop was switched to a Vess 26 A. Now getting 6500

(in reply to krayzc-RCU)

Post #: 3

RE: Is this normal for a DA-85 - 7/22/2008 4:16:09 PM

pilot727

Posts: 680
Joined: 6/16/2006
From: Clearfield, UT, USA
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I would think that one would have to break the engine in before looking for high RPM's, i use the xoar 22-8 the vess a has less pitch and would turn more RPM's but is that what you want while breaking it in, i am new with my first DA-50 and i am just asking, i used the 22x8 without any problem's and after breakin i am getting 7800 RPM's and run's great

(in reply to Ih82crash)

Post #: 4

RE: Is this normal for a DA-85 - 7/22/2008 4:37:52 PM

Jake Ruddy

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From: Bear, DE, USA
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Xoar puts a lot of load on an engine and honestly the thurst with all that load isn't very good anyhow.

Put a Mejzlik on it.. have you tuned the engine properly?

(in reply to pilot727)

Post #: 5

RE: Is this normal for a DA-85 - 7/22/2008 5:02:11 PM

pilot727

Posts: 680
Joined: 6/16/2006
From: Clearfield, UT, USA
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This is my first gasser, so i let a guy adjust it when needed and i run five gallons through it then went to Klothz, also i am just a sport pilot and fly really easy mostly half throttle unless i want to get up there, also i am in utah, makes a big difference, runs great and great power

(in reply to Jake Ruddy)

Post #: 6

RE: Is this normal for a DA-85 - 7/23/2008 12:14:28 AM

rcairflr

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From: Wichita, KS, USA
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I'm not sure if any of you have experience with the Xoar 26x10 or not, but that is exactly what I use on my DA-85, my engine rips the heck out of that prop and gives me great power. I have never tach'd it since it rips it so well and never had a reason to. ( I would guess 6700 RPM) This weekend I will tack it to see what I'm getting. My opinion is if you are only getting 6000, there is something wrong with your needles, engine or exhaust.

(in reply to pilot727)

Post #: 7

RE: Is this normal for a DA-85 - 7/23/2008 10:54:27 PM

pilot727

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From: Clearfield, UT, USA
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I am getting 7800 after breakin with a 22x8 XOAR and last week i tried a 21x10 and it hade so much tourqe it was hard to handle, but of course i am just a sport pilot and i do not have full rates on mine, got mine on easy rates ha ha so i do not mess up i usually fly at half throttle unless i am going vertical or a nice round loop, still do not need anywhere near full power to do anything i want to do. just love to fly and to learn from others

(in reply to rcairflr)

Post #: 8

RE: Is this normal for a DA-85 - 7/23/2008 10:57:18 PM

pilot727

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From: Clearfield, UT, USA
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Forgot to tell you i am flying the DA-50 but i do want to move up to the DA-85 and put it onto an extra 260

(in reply to pilot727)

Post #: 9

RE: Is this normal for a DA-85 - 7/26/2008 7:52:11 PM

rcairflr

Posts: 626
Joined: 9/2/2004
From: Wichita, KS, USA
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quote:

ORIGINAL: MR G

I could not find the DA support forum so I will post here.

I have a new DA-85, I am using a XOAR 26X10.

The engine is very new and has only about 25-30 min runtime on it.
I can only get about 6000 rpm out of it right now. It will idle as low as 1700 reliable.
I can idle lower but it does not sound reliable any lower than 1700.

I thought I would get about 6700-6900 at full power.
Maybe it needs more breakin time before those rpm's will be realized. What do you guys think??

It has tons of power and I am quite happy with it, just thought I would get more out of it.

Thanks for any replys

MR G

Took my Wildhare 33% Extra 260 out this morning, it is powered with DA-85, Slimline pitts muffler, Xoar 26x10 prop. Engine warm (not hot), 6930 RPM, verified with 2 tachs, one a Glo Bee and the other Hangar9. I love this prop on this engine, get very fast spinup and great thrust on this airframe. I haven't tried anything else since it works so well

Looking at your numbers I would say there is definitely something not right with your engine and or setup.

(in reply to MR G)

Post #: 10

RE: Is this normal for a DA-85 - 7/26/2008 8:40:44 PM

pilot727

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From: Clearfield, UT, USA
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You only have 30 minutes on your engine, never mind the RPM's and break it in right and after your engine is completely broken in you will then get your max RPM, I hope that your not peaking your high end out with only thirty minutes on the engine, my DA-50 run great everytime i took it to the field, i did not even check the RPM's until i used klotzs synthetic oil then after a few gallons of fuel through it i then adjusted the high end and with a zoar 22x8 i am turning 7800 RPM's, next i will purchase the DA-85 and again have my friend adjust it and run it as he has told me to do so and i only wanted one person to do the adjusting of the engine, it is my first gas engine and he has been running these engines for many years and it has more then i could ever want out of the DA-50

(in reply to rcairflr)

Post #: 11

RE: Is this normal for a DA-85 - 7/26/2008 9:01:52 PM

rcairflr

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quote:

ORIGINAL: pilot727

You only have 30 minutes on your engine, never mind the RPM's and break it in right and after your engine is completely broken in you will then get your max RPM, I hope that your not peaking your high end out with only thirty minutes on the engine, my DA-50 run great everytime i took it to the field, i did not even check the RPM's until i used klotzs synthetic oil then after a few gallons of fuel through it i then adjusted the high end and with a zoar 22x8 i am turning 7800 RPM's, next i will purchase the DA-85 and again have my friend adjust it and run it as he has told me to do so and i only wanted one person to do the adjusting of the engine, it is my first gas engine and he has been running these engines for many years and it has more then i could ever want out of the DA-50

Give me one good reason not to tune a gas engine for max engine RPM (as long as it is not running lean or leaning out in flight). It is not a glow engine and running rich will not make it run cooler and can possibly make it run hotter and will possibly do more harm than good since it can and probably will carbon it up.

For me, if my new DA-85 was only turning a Xoar 26x10 at 6000 RPM I would be concerned and looking for a good reason why, this is a very strong engine and those are puny numbers.

(in reply to pilot727)

Post #: 12

RE: Is this normal for a DA-85 - 7/26/2008 10:43:02 PM

pilot727

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From: Clearfield, UT, USA
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I didnt run mine rich but i did not peak it out either until it was broken in, this is my first gas engine and i am happy with the way it turned out, if you peak yours out and it runs great then i am happy for you, i will learn as i go and from others here, i only ran mine by the way i was told to do so by a friend that has been running these for years and i am very happy with the results, still i listen to what others have to say and how they break there engines in, i also put five gallons of fuel through it before going to klotzs, some guys run a gallon through theres and then go to another oil, that is why i am here to learn from the ones that have been flying these engines for years.

(in reply to rcairflr)

Post #: 13

RE: Is this normal for a DA-85 - 7/27/2008 2:30:18 AM

AirWizard

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Joined: 4/23/2004
From: Coffeyville, KS,
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All the manuals i've read recommend tuning to max rpm

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Post #: 14

RE: Is this normal for a DA-85 - 7/27/2008 2:56:58 AM

pilot727

Posts: 680
Joined: 6/16/2006
From: Clearfield, UT, USA
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I do have my manual so i will have to check it out to see just what it says about that and other things, but one thing i do know is that my engine has everything and more then i could ever ask for in an engine, it is my first gasser so i will learn as i go, thank you for your information. There is alway's someone that comes along with very good information that i find very interesting and learn from, got to start some where.

(in reply to AirWizard)

Post #: 15

RE: Is this normal for a DA-85 - 7/27/2008 3:38:55 AM

AirWizard

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From: Coffeyville, KS,
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This engine is a beast and you will love it!!!!!!

Good luck and remember once you go gas you won't go back

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David
____I'm having a Yak Attack_____

(in reply to pilot727)