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01-02-2008, 09:01 AM
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#1 |
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Bad-ass Super Contributer!
 
Join Date: Jan 2006
Location: Miami and arround the globe txs to B777-200F
Posts: 424
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DA 100 Tach reading
Hi I got a tach reading the other day on my DA stock mufflers, Biela 27x10 prop of 5600 Rpms.
Is this Ok?? engine is running AMsoil Dominator 50:1 on 95 oct gas. Field elevation 1555 Ft temp 30celsius. |
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01-02-2008, 09:15 AM
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#2 |
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Bad-ass Super Contributer!
Join Date: Oct 2006
Location: Alpharetta, GA
Age: 52
Posts: 5,510
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Re: DA 100 Tach reading
The RPM's might be a little low, but I'd be concerned about the Dominator oil. I've read some horror stories about that stuff gunking up an engine over time, apparently its designed for racing motors that are torn down more frequently. There's also an article in this month's AMA magazine about oil choices.
I don't want to start a "my oil's better than your's" discussion on your thread, but it did stick out when reading your question. |
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01-02-2008, 10:01 AM
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#3 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: co
Age: 51
Posts: 799
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Re: DA 100 Tach reading
6200 on Mejzlik 27/10 same w/vess27a
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01-02-2008, 10:37 AM
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#4 |
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Tony Quist
Join Date: Jan 2006
Location: Glendale, AZ
Age: 48
Posts: 1,492
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Re: DA 100 Tach reading
I know Biela props put a heavy load on the engine, but I dont know how much it will drop your rpm.
__________________
What are you going to do about it! |
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01-02-2008, 10:59 AM
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#5 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Tucson
Age: 36
Posts: 5,229
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Re: DA 100 Tach reading
6685 RPM on mejzlik 27X10. ES tuned pipes, 91 pump gas, BelRay MC-1 at 50:1. Elevation about 2900 feet, 70°F. I'd drop that Biela like a bad habit, especially if it is a new engine.
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01-02-2008, 11:32 AM
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#6 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Beaverlodge AB. Canada
Posts: 358
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Re: DA 100 Tach reading
DA 100 standard muffs Mejz 27/10 @ 6610...BME 110 standard muffs Biela 27/10 @ 6500..Both engines on MC-1 @ 50:1..2400 ft..I would say there's something wrong with your carb settings, engine or both..The DA should swing that prop well into the 6s
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01-02-2008, 11:58 AM
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#7 |
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Bad-ass Super Contributer!
Join Date: Feb 2006
Posts: 610
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Re: DA 100 Tach reading
DA 100 with std muffs 28/10 menz 6100 rpm Bel Ray MC-1 50to1. You should be in the mid 6000 rpm range.
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01-02-2008, 01:36 PM
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#8 |
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Bad-ass Super Contributer!
Join Date: Mar 2007
Location: Oakland, TN
Posts: 227
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Re: DA 100 Tach reading
Well broken in DA-100 running MTW cans swinging a PT 27X10 C/F prop at 6450 rpm. Using Redline racing oil 40:1. Your engine seems to be running a little low on the rpm's, I'd call DA and ask them for some advice.
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01-02-2008, 01:58 PM
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#9 | ||||||||||||||||||
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Flying: Giant Scale 3D
Join Date: Jul 2006
Location: The Netherlands
Age: 28
Posts: 8,416
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Re: DA 100 Tach reading
Greetz. |
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01-02-2008, 02:01 PM
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#10 |
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Bad-ass Super Contributer!
Join Date: Aug 2007
Location: Iowa Park Tx
Age: 49
Posts: 2,262
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Re: DA 100 Tach reading
Mine is at 6800-7000 using a lawnboy ashless break-in oil @ 32:1 swinging a 28/10 Mejzlik carbon prop. Its only been started 3 times.
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01-02-2008, 02:07 PM
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#11 |
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Bad-ass Super Contributer!
Join Date: Aug 2007
Location: Iowa Park Tx
Age: 49
Posts: 2,262
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Re: DA 100 Tach reading
oops I take that back, I lowered it to 6600-6800
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01-02-2008, 05:11 PM
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#12 | ||||||||||||||||||
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Diving for DA's
Join Date: Mar 2006
Location: Ashland Va
Age: 49
Posts: 1,578
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Re: DA 100 Tach reading
TROLL
__________________
BIG JERRYS RC AIRPORT: Shut down, gone for good " you earned them  zeros " DA 170 "better to wait than make a mistake" Mona Vie wana be "man up and support your CD " |
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01-02-2008, 07:52 PM
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#13 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Miami and arround the globe txs to B777-200F
Posts: 424
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Re: DA 100 Tach reading
Well my friends, I sent an email to DA this morning and this is what they answer me thumbs up for their cust support!!!!:
The number doesn't sound too far off for that prop. The Biela props have a very heavy load to them. If you switch to a Menz or Mejzlik your number will jump up. You can continue using Amsoil Dominator as your oil if you like. I usually recommend Amsoil Saber Professional at 100:1 or Redline Racing Oil at 40:1. Thanks, Jeff Desert Aircraft |
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01-04-2008, 09:28 PM
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#14 | ||||||||||||||||||
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IMAC is great!!
Join Date: Jan 2006
Location: Canada
Age: 32
Posts: 327
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Re: DA 100 Tach reading
Mine spins the Mejzlik 28x10 at 6840 on Bel-Ray H1R 40-1 with ATM-80 tuned pipes. This is a hot reading after a flight. Power is awesome. |
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01-04-2008, 10:19 PM
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#15 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: St Louis, MO
Age: 42
Posts: 1,258
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Re: DA 100 Tach reading
Oh yeh? Well my DA 100 spins 7300 on a 30x10 Master Airscrew...I must have a strong one eh?
__________________
Tony Vitiello St Louis, MO |
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