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Old 05-23-2019, 11:09 AM
Flybye Steve is offline
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What Prop for DA50cc

This is my first experience with the DA50.
It's on a 107" Decathlon.
Also, anything special I should no about how to start it? It will be mounted with the cylinder inverted.
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Old 05-23-2019, 01:02 PM
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For this aircraft the perfect prop would be a Vess 23X8. Da sells them as well as other outlets.

When starting a DA 50 be careful not to flood it. They do flood easily if you are used to DLE's, etc. Choke on, throttle above idle, flip it a few times till it "burps." Choke off, flip, start, go fly.

Flipping the prop must be fast, as the DA ignition will not spark on low speed flips (a safety feature.)
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Old 05-23-2019, 01:55 PM
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DA manuals are very good and on line if you don't have one. Read it thoroughly. There is no one prop for a 50, so it's a question of what's available and how much. Should be a nice comb on the Decathlon.
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Old 05-23-2019, 02:05 PM
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The tip on flooding is very true. Mine is easy to flood and a pain to get started once it does. Here's my starting procedure:
1. throttle at 1/3
2. ignition on
3. full choke
4. 6-7 flips until the engine pops
5. chock off
6. throttle to high idle
7. 2-3 flips until the engine starts

For props I like the 23x8 as well. I'm running a wood Falcon civilian 23x8 on my cub with a DA-50. I've used a Biela 23x8 too which loads the engine more but works well.
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Old 05-23-2019, 02:17 PM
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Quote:
Originally Posted by LIpilot View Post
For this aircraft the perfect prop would be a Vess 23X8. Da sells them as well as other outlets.

When starting a DA 50 be careful not to flood it. They do flood easily if you are used to DLE's, etc. Choke on, throttle above idle, flip it a few times till it "burps." Choke off, flip, start, go fly.

Flipping the prop must be fast, as the DA ignition will not spark on low speed flips (a safety feature.)
Vess uses A,B,C,D to designate their pitch#...maybe you ment 23a ..? Which I think is perfect for a 50 to 55cc
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Old 05-24-2019, 10:47 PM
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Originally Posted by ponyboy082662 View Post
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Vess uses A,B,C,D to designate their pitch#...maybe you ment 23a ..? Which I think is perfect for a 50 to 55cc
23b for a DA50. 23a works if itís what you have but tends to prop rip at WOT.
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Old 05-27-2019, 08:00 AM
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+1 for a 23x8 - its the best all around prop on a 50.
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Old 05-27-2019, 08:05 AM
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wrongwayfeldman
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Quote:
Originally Posted by Arkole Blake View Post
23b for a DA50. 23a works if itís what you have but tends to prop rip at WOT.
Depends on what Airframe you have it on ...a warbird or speedy frame...yes use the 23b...but for a 3D frame I prefer the instant throttle response of the 23a...
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Old 06-03-2019, 08:57 PM
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I agree DA's can be flooded easily. As far as a pain to get started once flooded. Not really, just try this next time you flood your engine. Ignition off, full throttle, choke off, then back flip the prop (clock wise rotation) a few times, 3-4 for myself. Ignition on, throttle at your usual starting
position and flip as you normally do. My DA's, single or twin generally start or at least bark in 4 flips or so. Just my experience and my 2 cents on starting a flooded engine.
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