3 blade propeller
09-17-2004, 05:03 PM
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3 blade propeller
Hi there! Could anyone suggest me a 3 blade carbon fiber propeller for a DA-50 gas engine? It will be used on a Skybolt (from Dario Brisighella) that weights 17 to 20lb (78" wingspan). My objective is acro!
Thank you very much!
Cristiano.
Thank you very much!
Cristiano.
09-19-2004, 01:13 PM
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RE: 3 blade propeller
Hummmm....I'm thinking to go with a 20x10 or a 20x12...but the 20x12 will force too much the engine won't it? It's a biplane, lots of drag....
09-19-2004, 03:30 PM
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RE: 3 blade propeller
Your right about the bipe adding more load to the engine for a given prop. If mono wing people are having good luck with a 21x11 narrow I would bet that a 20 x 10 would be a good starting place. Take temp readings on you engine and you will be able to determine if it is feasible to go with more prop.
09-19-2004, 06:39 PM
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RE: 3 blade propeller
Thank you all!
But what's the most accurate method of reading the engine temp?
What do you think of a Bolly 20x12 narrow? I saw its specifications on Bolly's web site and it's recommended for a 60cc engine, but is in the range indicated by DA. I'm in doubt between this and the Mejzlik 20x10.
But what's the most accurate method of reading the engine temp?
What do you think of a Bolly 20x12 narrow? I saw its specifications on Bolly's web site and it's recommended for a 60cc engine, but is in the range indicated by DA. I'm in doubt between this and the Mejzlik 20x10.
09-19-2004, 09:39 PM
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RE: 3 blade propeller
I use the infrared heat gun available at radioshack. Just be sure and measure the temp from the same place all the time. I measure mine as close to the spark plug as I can get shooting it through the front of the cowl. My DA 100 and 150 run optimally at around 175 - 200 degrees depending on how much 3D I do prior to landing so I'm sure a 50 would be in that general ballpark. And try to get the temp as soon as you can after turning off the engine.
I wouldn't worry about it too much though if it is flying your plane the way you want it too b.c you did the right thing in buying a DA b.c they are committed to keeping your engine running so your plane can stay in the air. If it wears out after a few seasons, or one, depending on how much you fly, just send it back and they will replace the guts and send it back to you the next day. Not trying to get anyone to intentionally trying to tear up a motor, but it is nice to know that you can just prop and run your engine the way it flies your plane the best and not be paranoid about the engine crapping out on you and having it sit on a shelf at some dealer for a month or more waiting for it to be sent back.
I wouldn't worry about it too much though if it is flying your plane the way you want it too b.c you did the right thing in buying a DA b.c they are committed to keeping your engine running so your plane can stay in the air. If it wears out after a few seasons, or one, depending on how much you fly, just send it back and they will replace the guts and send it back to you the next day. Not trying to get anyone to intentionally trying to tear up a motor, but it is nice to know that you can just prop and run your engine the way it flies your plane the best and not be paranoid about the engine crapping out on you and having it sit on a shelf at some dealer for a month or more waiting for it to be sent back.
