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Old Oct 08, 2012, 09:31 AM
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USA, TX, Houston
Joined Jan 2003
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Twinjet Prop Recommendation

Hey I'm finally going to finish my twinjet... I need recommendations on props. I have two ARC 28-47-2 motors and two Turnigy Sentry 60A escs. What props would you recommend and what batteries? 2- 3s? 2-4s? 1-6s? I want to be as fast as possible with those esc's but if I need new esc's I guess I can get a couple... How do you figure out how many amps it's going to pull without testing it first?
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Old Oct 08, 2012, 01:11 PM
222 km/hr Parkjet flyer
solentlife's Avatar
Latvia, Ventspils pilsēta, Ventspils
Joined Jan 2010
9,014 Posts
Quote:
Originally Posted by heli3d View Post
Hey I'm finally going to finish my twinjet... I need recommendations on props. I have two ARC 28-47-2 motors and two Turnigy Sentry 60A escs. What props would you recommend and what batteries? 2- 3s? 2-4s? 1-6s? I want to be as fast as possible with those esc's but if I need new esc's I guess I can get a couple... How do you figure out how many amps it's going to pull without testing it first?
Others may know the model you are talking about .. but I don't ... can you give some details / photos etc. ? Once I know weight, size, see the shape etc. - then maybe we can talk about props ...

Nigel
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Old Oct 08, 2012, 06:20 PM
BLANIK213
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United States, NY, Phoenicia
Joined Feb 2008
665 Posts
heli3d a good starting point would be the 3s set up with a 6x4 prop graduating to a 4s for a big increase in speed and thrust. Both 3s and 4s should be 35c-45c to handle the amps and allow you to prop up later to a 6x6 and max speed for that motor and esc's.
Post your results and good flying to you.
Woody
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Old Oct 13, 2012, 03:51 PM
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Chattanooga, Tennessee, United States
Joined May 2003
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On 3s with a 6x4 APC E my 28-47-2 drew 27.40A/306W and got me 951g @ 80mph... with a 6x5.5 APC E it drew 33.7A/368W and got me 917g @ 103mph. This motor used to be rated at 40A/350W but I know guys have pushed it far harder.....I imagine 6x6 on 4s would really push the envelope. During static testing the most I pushed through it was 44.7A/465W and it was getting pretty hot after 15 secs.
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