DA-60 Testing ( Taming the Monster ) - Page 4 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-07-2012, 09:09 PM   #31
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Re: DA-60 Testing ( Taming the Monster )


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Here is the motor mounted to the airframe and running at idle.
Vibrations are quite low and very acceptable using the RCExel ignition.
Compared to other videos I have watched on youtube, the vibes on mine are well within acceptable.

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


Some maiden videos will be posted in the assembly thread here
http://www.rccanada.ca/rccforum/showthread.php?t=142993
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Old 07-07-2012, 09:48 PM   #32
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Re: DA-60 Testing ( Taming the Monster )

Very nice Brad!!

Sheesh - it almost bent those posts over with that little shot of power
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Old 07-11-2012, 09:06 AM   #33
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Re: DA-60 Testing ( Taming the Monster )

food for thought,

Have you ever compared the DA60 Carb, to a DLE55?

the DA60 carb has a HUGE throat on it, almost twice the diameter of the 55 carb., I bet a velocity stack (long one) or even a restricter plate may go a long way in taming the beast without much power loss

..... but like my wife says to me, "I like you just the way you are...........even though there are a couple things I'd like to see change!"
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Old 07-29-2012, 08:20 PM   #34
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Re: DA-60 Testing ( Taming the Monster )

Brad and I did some header length / prop testing the other day! What a powerhouse of a motor!!!

Below are the results...

DA60, stock muffler (likely 20-30 flights on the motor)
Falcon 24x10 CF: 6440rpm
Beila 24x8 CF: 6500rpm
Xoar 24B 3D Wood: 6810rpm (My DLE55 brand new ran 6260rpm on stock muffler, 6720 on ES Pipe)
Xoar 25x10 Wood: 5800rpm

DA60, 16 3/4" Header Length, ES Composite Pipe
Beila 24x8 CF: 6540rpm
Observations: Definitely not on the pipe.

DA60, 15 3/4" Header Length, ES Composite Pipe
Beila 24x8 CF: 6630rpm
Observations: Sounded better, 90 rpm jump, so going in correct direction!

DA60, 15" Header Length, ES Composite Pipe
Beila 24x8 CF: 6780rpm
Observations: Sounded really nice! Definitely came on the pipe due to sound, throttle transition and top rpm

DA60, 14.5" Header Length, ES Composite Pipe
Beila 24x8 CF: 6780rpm
Observations: No real change from 15" length - perhaps a hair smoother. Approximatley a 220rpm increase over the stock muffler


DA60, 14" Header Length, ES Composite Pipe
Beila 24x8 CF: 6760rpm
Observations: Not as good of throttle response, not as nice sounding - starting to fall back off the pipe.



What we found interesting is that optimal header length was 14.5" whereas the same pipe on a DLE55 has been tested with optimal header length of 12.5", which further emphasizes the importance of doing these tests - things like motor design, volume, porting, etc all play a role and we can't just believe the "one length fits all" recommendations from the manufacturers!!
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Old 07-30-2012, 06:59 AM   #35
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Re: DA-60 Testing ( Taming the Monster )

Monster engine, the other boys have their work cut out to match the DA 60!!

Thanks for all the time spent guys!
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Old 01-11-2013, 03:59 PM   #36
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Re: DA-60 Testing ( Taming the Monster )

OK !!!!!!!

More pipe and header testing

After flying the DA 60 all summer on the ES55 pipe. Trevor let me try one of his RE-2 pipes to do some back to back comparisons

I also have a KS-1060 pipe coming. According to Canada Post, it should be here mid week next week.

So hopefully by the end of next week I can do more testing with the KS pipe.

Here is what I have so far ...... There is more to come

Unfortunately I can just put it in the body of this post. I have to putit as an attachment
Attached Files
File Type: pdf Header Length Testing.pdf (49.0 KB, 148 views)
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Old 01-11-2013, 04:02 PM   #37
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Re: DA-60 Testing ( Taming the Monster )

Also forgot to mention.

I have put the DA ignition back on. The hall sensor on the DA ignition needs to be fully retarded.
Once that is done, it runs just fine. No misfires no midrange sputtering. Which was a problem when these engines first shipped.
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Old 01-11-2013, 05:12 PM   #38
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Re: DA-60 Testing ( Taming the Monster )

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Old 01-11-2013, 08:37 PM   #39
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Re: DA-60 Testing ( Taming the Monster )

Hi Roger,

DA is different .

DA's ignitions advance the timing. While DLE RCExel etc etc retard the timing.

RCexel, like you said. Is set at 28 degrees advanced at TDC.

When you flip the prop. The ignition module electronically retards the timing back to about 12 to 14 degrees so the engine doesn't kick back......much

Then as the rpms increase, the module works its way forward increments or steps until at around 5500 rpm where it is no longer retarding the timing and is firing at 28 degrees advance where the hall sensor is set.
If I remember correctly, the DLE 55 ignition has 13 steps. The DLE 30 has around 6 or 7. DLE 20 has 2 LOL.

On the DA, the hall sensor is usually set at around 4 degrees advance at TDC.
Also with the DA ignition. It works on an induction coil system where the others are an electronic magnetic switch in the hall sensor.

The DA ignition needs to see 400 rpm or more or it doesn't fire. A nice safety feature if you accidentally bump your prop.

The average person flips the prop at about the equivalent of 800 rpm.
The module can fire.
Once the engine is running, the DA ignition starts advanceing the timing electronicly in programmed steps until it is around 30 degrees advanced at full throttle. I don't know how many increments or steps DA uses.

The problem DA was having with midrange burble was because the timing was to far advanced from the factory. The engine would misfire and sound terrible at half throttle.
How the timing causes that i dont know... But it does on the DA.
Trevor and I saw t first hand yesterday while running my 60.

We had been running the engine for a few different props. We decided to advance the hall sensor a little tosee what would happen. We were discussing the whole scenario at that time.
I moved the sensor a couple degrees. Not even as far as when they were first shipping the motors. I started the motor. As soon as trevor started to dvance the throttle the motor started sputtering. he went to full throttle.
It cleared up at full throttle. We checked the rpm's. There was no top end gain advancing the sensor.
We moved the sensor all the way back again and it ran perfectly.
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Old 01-12-2013, 10:58 AM   #40
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Re: DA-60 Testing ( Taming the Monster )

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