Prop size and landing speed
11-02-2019, 08:57 AM
#3
Yes but it would reduce your top end as well. Depending on the size and model most guys I know who fly the bigger versions use flaps. landing gear and any other bits and pieces they can push out in the airstream to bleed off speed. Some like the P51 are so clean bleeding off speed on landing is a problem.
A good friend has a Hanger 9 ARF and he kills the motor and lands dead stick. One day it will bite him in the AZZ.
Dennis
A good friend has a Hanger 9 ARF and he kills the motor and lands dead stick. One day it will bite him in the AZZ.
Dennis
11-02-2019, 10:52 AM
#5
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Prop size
Thank you. The plane I am having trouble with is a top flite P-51 kit I built a few years ago. Is has flaps and powered with an OS 1.20 four stroke. I have a 15X8 prop on now so I will switch to a 17x5 or 17x6 prop depending how the engine tacks. Also double check the c/g. It will still fly plenty fast with the 1.20. Thanks again.
11-03-2019, 06:25 AM
#11
Unless you are going to mail order your props you most likely will end up using what is readily available locally. Cost being a factor so in my area APC or wood props are the most reasonable for my purposes.
If you nose over a lot carbon props may prove to be costly. Wood props may be the answer for you as there is less chance of bending the crankshaft with contact with the ground. APC being a bit stronger might be a concern.
My choices are APC and in wood Zinger, Zinger Pro and Zoar. Why, because they are all available locally and I am not interested in racing or getting the ultimate speed out of my scale planes. As for noise well everyone else is running similar props at the field so you probably would never notice the noise difference.
The most important thing you will do is to balance which ever prop you choose.
Buy a 16X6 in an APC and a couple of wood manufacturers, balance them and give them a try. Which ever one you like buy several and balance them and you should be golden. You can do the same for a 15X6-10 however I think that it may only be available in wood.
Quick look on the internet:
16 inch Falcon Carbon Prop around 40 bucks.
16X6 APC 14 bucks.
Zinger, Zinger Pro and even 15X6-10 ranging from 10 to 15 bucks but my understanding is they have stopped manufacturing them.
Xoar 16X6 around 15 bucks
Dennis
If you nose over a lot carbon props may prove to be costly. Wood props may be the answer for you as there is less chance of bending the crankshaft with contact with the ground. APC being a bit stronger might be a concern.
My choices are APC and in wood Zinger, Zinger Pro and Zoar. Why, because they are all available locally and I am not interested in racing or getting the ultimate speed out of my scale planes. As for noise well everyone else is running similar props at the field so you probably would never notice the noise difference.
The most important thing you will do is to balance which ever prop you choose.
Buy a 16X6 in an APC and a couple of wood manufacturers, balance them and give them a try. Which ever one you like buy several and balance them and you should be golden. You can do the same for a 15X6-10 however I think that it may only be available in wood.
Quick look on the internet:
16 inch Falcon Carbon Prop around 40 bucks.
16X6 APC 14 bucks.
Zinger, Zinger Pro and even 15X6-10 ranging from 10 to 15 bucks but my understanding is they have stopped manufacturing them.
Xoar 16X6 around 15 bucks
Dennis
Last edited by Propworn; 11-03-2019 at 08:06 AM.
11-03-2019, 08:05 AM
#13
I really like the versatility and quality of the APC props but in some cases a wood prop is correct for scale looks. Sometimes a classic wood prop looks even better. There are cheaper off brand props out there that look similar even the same as the name brand but there have been reports of delaminating and props that are impossible to balance. I try and stick to the name brand though not perfect they are pretty consistent in the build quality department.
Master Airscrew has been around for a long time and they make both synthetic and wood props.
https://www.masterairscrew.com/colle...rplanes?page=5
Falcon does have a selection of wood props at a very reasonable price point.
https://www.f3aunlimited.com/airplan...-wood-electric
Master Airscrew has been around for a long time and they make both synthetic and wood props.
https://www.masterairscrew.com/colle...rplanes?page=5
Falcon does have a selection of wood props at a very reasonable price point.
https://www.f3aunlimited.com/airplan...-wood-electric
11-03-2019, 11:04 AM
#14
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I have used zinger, master airscrew, and APC. I have a master airscrew 3blade on my north star and it came perfectly balanced. I will take all your advice and try a few different props. I do like Zinger, and APC. I will try wood first to take away a little nose weight, and see how it idled. I have several planes and use APC on the majority of them. Especially float planes. Water does not like wood props. Thanks again
11-03-2019, 11:12 AM
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I’m also glad there are still glow and gas peeps out there. Most of my club flys electric foam planes now. In my opinion there not a model there a toy. I’m old school and like the sound.
11-03-2019, 01:53 PM
#16
I hear ya on that one. Personally I fly all 3 power sources, glow, gas and electric. My main focus these days is pattern and F5J sailplanes. Both of those happen to be electric. I have a couple of glow sport models and one 70cc gasoline airplane. IMO use what is best suited to the airplane.
11-04-2019, 05:41 AM
#17
I fly gas, glo, electric as well and in some cases I have used glo or gas props on my electrics because I could not find an electric version of the size, pitch or style of prop I needed/wanted. I found as long as the electric could spin the prop at the same or close to the RPM that I would expect from the internal combustion motor on that airframe it actually flew quite well. That being said you have to spend time balancing the prop as I don't believe the electric motor is as rigid as the crankcase casting and in the event of a prop strike the IC prop might make the setup more prone to bending the armature. Everything in this hobby revolves around compromises you just have to reason out what is acceptable to you.
11-07-2019, 12:01 PM
#18
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Hi!
A 16x6 APC or a 16x6 Graupner G-sonic is what I would choose for a 20cc (1.20) four stroke.
I fly glow mostly but have some small electric (toy) planes as well. Sad that pattern (F3A) now is all electric . Makes it more "toyish" in my opinion.
A 16x6 APC or a 16x6 Graupner G-sonic is what I would choose for a 20cc (1.20) four stroke.
I fly glow mostly but have some small electric (toy) planes as well. Sad that pattern (F3A) now is all electric . Makes it more "toyish" in my opinion.
