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DA 50.....best prop (needs more vertical)????

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Old 08-24-2010, 04:45 PM
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bushong572
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Default DA 50.....best prop (needs more vertical)????

I recently maidened my Aeroworks 50cc Ultimate with a DA50/Mejzlik 23x8 combination. I expected the plane to be vertically "challenged" from the many posts I have read, it's heavy at 19 lbs. It has plenty of straight-line speed, but the vertical is severly lacking. I usually run a Xoar 23x8 on my 50s but I thought a Mejzlik 23x8 was THE prop for a DA 50. My other DA 50s turn a Xoar 23x8~6700 rpms, this DA 50/ J' Tec Pitts turns the 23x8 Mejzlik the same (6700).....I expected a little more from a carbon fiber prop.

Is the DA 50/Mejzlik the best I can do???

I can get a Xoar 23x8 to try, but I thought the Mejzlik would be better.


Thanks for any help.................
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Old 08-24-2010, 05:52 PM
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Default RE: DA 50.....best prop (needs more vertical)????

put a 22 inch prop on there
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Old 08-24-2010, 06:04 PM
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Default RE: DA 50.....best prop (needs more vertical)????

Go with the Mej 22x8 it will perform
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Old 08-24-2010, 06:38 PM
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Default RE: DA 50.....best prop (needs more vertical)????

Try a 23A or 22B Vess. Do your other planes have the same muffler? You'll get better performance with the DA side dump muffler.
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Old 08-24-2010, 07:10 PM
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Default RE: DA 50.....best prop (needs more vertical)????

i will bet you get the best vertical performnce from a Xoar 22-8 laminate.i still haven't found a better prop for a DA50 or a DLE55 as far as pulling and rite now power.has good speed when you want it.i get 7200 out of it on the DLE55.
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Old 08-25-2010, 04:49 PM
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Default RE: DA 50.....best prop (needs more vertical)????

19 lbs! That is 1/2 lb over the AW advertised max and comes out to 26oz/sq ft wing loading. I would try to lose 1 to 1-1/2 lbs. Is that possible?
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Old 08-26-2010, 05:41 AM
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Default RE: DA 50.....best prop (needs more vertical)????

yep,your rite about that,never saw a 50 yet that could 3d a 19lb. plane.
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Old 08-26-2010, 07:34 AM
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Default RE: DA 50.....best prop (needs more vertical)????

Thanks for all of the replies..........

I have a Xoar 22x8 (actually a cut down 23x8) I can try. As far as the weight goes, I don't know where AW came up with their weight. I know several of these flying....all at 18.5-19.5 lbs.
I would have used the stock DA muffler (I thought the performance would be better with it), but it really would not work with the Ultimate's cowl. You can see the "limited" pull-out on the AW videos. I've heard the same complaint from numerous AW Ultimate owners. I'm not much of a 3D flyer, so I thought it wouldn't be a problem. It sounds like I should have gone with the Mejzlik 22x8...............too bad I can't cut my 23x8 down.

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Old 08-26-2010, 08:23 AM
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Default RE: DA 50.....best prop (needs more vertical)????

I use the Mejzlik 22x8 on my DLE 55, works well in my Yak and SBach but they are no where near 19 lbs.
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Old 08-26-2010, 02:51 PM
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Default RE: DA 50.....best prop (needs more vertical)????

bushong572, you are at about 2800' altitude. That is part of the problem. You are down about 10% on power compared to sea level. A DA50 on 19 lb plane at 2800' altitude is going to be a dog. I have a DA50 on a 14.25 lb AW 35cc Extra 260 and fly at over 5000' altitude. This combination has good power but I do not consider it overpowered. It would probably be equivalent to a 16 lb plane at your altitude or a 17-18 lb plane at sea level. You might consider a DA60 whenever it is available.
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Old 08-26-2010, 03:47 PM
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Default RE: DA 50.....best prop (needs more vertical)????

I hate to suggest this, but what about a DA 85? With the altitude and weight challanges that might be something to consider. I am not sure even what weight the 85 typically pulls.
Just FYI, I have a DA-50 on my GP Bipe and at 14.5 lbs it has very low wing loading and pulls like crazy. I really, really like the looks of the AW Ultimate and hope you can make it work out.
Good Luck!
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Old 08-26-2010, 03:54 PM
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Default RE: DA 50.....best prop (needs more vertical)????

i have a 85 on a 22 lbs cap 232 use to be 21.5 with carbon gear that is sweet for power
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Old 08-26-2010, 04:00 PM
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Default RE: DA 50.....best prop (needs more vertical)????

I think a DA 85 would be too much (power and weight). I had a ZDZ 60 that I thought about using but didn't want to add any more weight to the plane. I've owned several 50cc planes around 17.5-18 lbs. I think the Ultimate's high level of drag definitely doesn't help. A 22x8 may help ,if not, a DA 60 might be the way to go. I really like the plane. I just wish it were 2 lbs lighter.

This is my 3rd Ultimate (.40 glow, 1.20 glow, 50cc). I hate to buy another engine since I already had the DA50 lying around. I think I will just fly it for a while (maybe try another prop) and enjoy. It really does fly well.
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Old 08-26-2010, 07:00 PM
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Default RE: DA 50.....best prop (needs more vertical)????

19 lb for a 50cc plane is heavy.

Some simple and effective ways to cut down on the weight.

1. use of a smaller fuel tank (18 oz one is more than enough).
2. use of light weight batteries. For example two A123 1100mah for receiver. One 1100 mah nicad (5 cells) for ign.
3. Carbon fiber wing/stab tubes and landing gear.

DA85 is heavier and requires at least 26X10 prop. The 50cc plane probably will not have enough prop clearance and the wing loading will be even high. It will not work.
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Old 08-27-2010, 09:48 AM
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Default RE: DA 50.....best prop (needs more vertical)????


Quote:
ORIGINAL: bushong572

I think a DA 85 would be too much (power and weight). I had a ZDZ 60 that I thought about using but didn't want to add any more weight to the plane. I've owned several 50cc planes around 17.5-18 lbs. I think the Ultimate's high level of drag definitely doesn't help. A 22x8 may help ,if not, a DA 60 might be the way to go. I really like the plane. I just wish it were 2 lbs lighter.

This is my 3rd Ultimate (.40 glow, 1.20 glow, 50cc). I hate to buy another engine since I already had the DA50 lying around. I think I will just fly it for a while (maybe try another prop) and enjoy. It really does fly well.
If your coming over to the big bird in Austin this weekend I'll let you try one of my 23A's.
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Old 08-27-2010, 09:55 AM
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Default RE: DA 50.....best prop (needs more vertical)????

I would find the best prop, probably a 22x8, and enjoy it until you can get a DA-60. The DA-120 is lighter (4.95 lbs) than the DA-100L (5.57 lbs), so I would expect that the DA-60 would be about the same weight as the DA-50.

Personally, I think that Aeroworks has excellent aircraft, but I will think twice before I get another one because of the weight.
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Old 08-27-2010, 02:06 PM
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Default RE: DA 50.....best prop (needs more vertical)????


Quote:
ORIGINAL: cjcyclesrc


Quote:
ORIGINAL: bushong572

I think a DA 85 would be too much (power and weight). I had a ZDZ 60 that I thought about using but didn't want to add any more weight to the plane. I've owned several 50cc planes around 17.5-18 lbs. I think the Ultimate's high level of drag definitely doesn't help. A 22x8 may help ,if not, a DA 60 might be the way to go. I really like the plane. I just wish it were 2 lbs lighter.

This is my 3rd Ultimate (.40 glow, 1.20 glow, 50cc). I hate to buy another engine since I already had the DA50 lying around. I think I will just fly it for a while (maybe try another prop) and enjoy. It really does fly well.
If your coming over to the big bird in Austin this weekend I'll let you try one of my 23A's.

Thanks for the offer, but I won't be there. [&o]
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Old 08-27-2010, 02:07 PM
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Default RE: DA 50.....best prop (needs more vertical)????


[quote]ORIGINAL: FrankFuss

I would find the best prop, probably a 22x8, and enjoy it until you can get a DA-60. The DA-120 is lighter (4.95 lbs) than the DA-100L (5.57 lbs), so I would expect that the DA-60 would be about the same weight as the DA-50.



I think this is what I will do....thanks
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