Cap 232
 

I have this plane, wingspan 1460mm and length 1250mm... I have a Saito 2 Stroke FA65... I am using a 13x6 prop at moment... I have no clue how props work... but I need to know which size prop to use if I want to be able to fly slowly for when I need to do a landing... need to be able to glide it in almost...

RE: Cap 232
 

you have a couple oxymoron's going on here. A 232 doesn't glide very well, besides you get your slowest landings under power, if you get it too slow your going to tip stall it or snap roll it in. an FA65 is a 4 stroke. and you can slow the plane down by going to a 13x7 or 14x7, probably a 13x7 since you want throttle response with that kinda plane, just make sure your rpm's are within spec.

RE: Cap 232
 

You could try a lower pitch prop like APC 14x4W or a 14x5, but in principle the prop you already have should work well.
Have you adjusted the idle speed so it is not unecessary high? I run a similar size CAP using a Saito 72 with a 13x6 propeller and it lands just fine with the engine at idle.
Also, CAP 232 and similar aircraft shouldn't be landed to slow or you run the risk of stalling it.

RE: Cap 232
 

I was just asking around to check if it was possible to glide it in... but after playing on the sim I see exactly what you oaks are talking about... it either snaps or stalls... sorry for the noobness... this is my first nitro...

RE: Cap 232
 

No problem being a noob... we all started out somewhere..

Props. Well, perhaps this will help. Props come in sizes, usually measured in inches, perhaps in your area, they are metric.. however, I'll relate it to you as I see it so I don't get the numbers wrong... ;)

Props, as I said, come in sizes. For instance, take the 13-7 prop. That is 13 inches in diameter with a 7 inch pitch. The diameter is self explanatory. The pitch takes some explanation. In this case, a 7, (the second number in the prop size) is the prop pitch. This is the theoretical amount of travel for one complete 360 degree rotation in inches. So, if that prop turns one complete revolution, it will move 7 inches in the air or move7 inches of air through it.

So, ideally, if it is operated at full throttle, take 10,000 RPM for instance, that means that the prop will rotate 10,000 times, or 70,000 inches of air in one minute. That's 5833.333 feet per minute or 97 feet per second, which equates to slightly over 60 miles per hour.

That's the theory of it. Also, consider this. The pitch of a prop is like the gears of a transmission in a car. If you down-shift to a lower gear, then you can pull harder but at a lower speed. As you shift up, to second, third, fourth, your engine has a lower RPM but the car is going at a faster rate, but it does not have the same ability to accelerate as fast as it did using a lower gear.

The prop works the same way. Lower the pitch, you will have faster acceleration, but a lower top end speed, but you will also pull harder. Your plane will get off the ground faster, but it will not go as fast as it would with a higher pitch.. however, the higher pitch will cause you to accelerate at a slower rate than the one with a lower pitch.

You have to work out what you want and what is ideal for your flying style. If you want 3D, for instance, you would tend to use something with a lower pitch to get that instant burst of acceleration plus the power to hold a plane in a hover. If you are doing sport flying and don't give two hoots for 3D, then you would move up in pitch to give you better speed, but less initial power. It's a trade off.

Hope that helps.

CGr.

RE: Cap 232
 

No problem being a noob... we all started out somewhere..

Props. Well, perhaps this will help. Props come in sizes, usually measured in inches, perhaps in your area, they are metric.. however, I'll relate it to you as I see it so I don't get the numbers wrong... ;)

Props, as I said, come in sizes. For instance, take the 13-7 prop. That is 13 inches in diameter with a 7 inch pitch. The diameter is self explanatory. The pitch takes some explanation. In this case, a 7, (the second number in the prop size) is the prop pitch. This is the theoretical amount of travel for one complete 360 degree rotation in inches. So, if that prop turns one complete revolution, it will move 7 inches in the air or move7 inches of air through it.

So, ideally, if it is operated at full throttle, take 10,000 RPM for instance, that means that the prop will rotate 10,000 times, or 70,000 inches of air in one minute. That's 5833.333 feet per minute or 97 feet per second, which equates to slightly over 60 miles per hour.

That's the theory of it. Also, consider this. The pitch of a prop is like the gears of a transmission in a car. If you down-shift to a lower gear, then you can pull harder but at a lower speed. As you shift up, to second, third, fourth, your engine has a lower RPM but the car is going at a faster rate, but it does not have the same ability to accelerate as fast as it did using a lower gear.

The prop works the same way. Lower the pitch, you will have faster acceleration, but a lower top end speed, but you will also pull harder. Your plane will get off the ground faster, but it will not go as fast as it would with a higher pitch.. however, the higher pitch will cause you to accelerate at a slower rate than the one with a lower pitch.

You have to work out what you want and what is ideal for your flying style. If you want 3D, for instance, you would tend to use something with a lower pitch to get that instant burst of acceleration plus the power to hold a plane in a hover. If you are doing sport flying and don't give two hoots for 3D, then you would move up in pitch to give you better speed, but less initial power. It's a trade off.

Hope that helps.

CGr.

RE: Cap 232
 

No problem being a noob... we all started out somewhere..

Props. Well, perhaps this will help. Props come in sizes, usually measured in inches, perhaps in your area, they are metric.. however, I'll relate it to you as I see it so I don't get the numbers wrong... ;)

Props, as I said, come in sizes. For instance, take the 13-7 prop. That is 13 inches in diameter with a 7 inch pitch. The diameter is self explanatory. The pitch takes some explanation. In this case, a 7, (the second number in the prop size) is the prop pitch. This is the theoretical amount of travel for one complete 360 degree rotation in inches. So, if that prop turns one complete revolution, it will move 7 inches in the air or move7 inches of air through it.

So, ideally, if it is operated at full throttle, take 10,000 RPM for instance, that means that the prop will rotate 10,000 times, or 70,000 inches of air in one minute. That's 5833.333 feet per minute or 97 feet per second, which equates to slightly over 60 miles per hour.

That's the theory of it. Also, consider this. The pitch of a prop is like the gears of a transmission in a car. If you down-shift to a lower gear, then you can pull harder but at a lower speed. As you shift up, to second, third, fourth, your engine has a lower RPM but the car is going at a faster rate, but it does not have the same ability to accelerate as fast as it did using a lower gear.

The prop works the same way. Lower the pitch, you will have faster acceleration, but a lower top end speed, but you will also pull harder. Your plane will get off the ground faster, but it will not go as fast as it would with a higher pitch.. however, the higher pitch will cause you to accelerate at a slower rate than the one with a lower pitch.

You have to work out what you want and what is ideal for your flying style. If you want 3D, for instance, you would tend to use something with a lower pitch to get that instant burst of acceleration plus the power to hold a plane in a hover. If you are doing sport flying and don't give two hoots for 3D, then you would move up in pitch to give you better speed, but less initial power. It's a trade off.

Hope that helps.

CGr.

RE: Cap 232
 

No problem being a noob... we all started out somewhere..

Props. Well, perhaps this will help. Props come in sizes, usually measured in inches, perhaps in your area, they are metric.. however, I'll relate it to you as I see it so I don't get the numbers wrong... ;)

Props, as I said, come in sizes. For instance, take the 13-7 prop. That is 13 inches in diameter with a 7 inch pitch. The diameter is self explanatory. The pitch takes some explanation. In this case, a 7, (the second number in the prop size) is the prop pitch. This is the theoretical amount of travel for one complete 360 degree rotation in inches. So, if that prop turns one complete revolution, it will move 7 inches in the air or move7 inches of air through it.

So, ideally, if it is operated at full throttle, take 10,000 RPM for instance, that means that the prop will rotate 10,000 times, or 70,000 inches of air in one minute. That's 5833.333 feet per minute or 97 feet per second, which equates to slightly over 60 miles per hour.

That's the theory of it. Also, consider this. The pitch of a prop is like the gears of a transmission in a car. If you down-shift to a lower gear, then you can pull harder but at a lower speed. As you shift up, to second, third, fourth, your engine has a lower RPM but the car is going at a faster rate, but it does not have the same ability to accelerate as fast as it did using a lower gear.

The prop works the same way. Lower the pitch, you will have faster acceleration, but a lower top end speed, but you will also pull harder. Your plane will get off the ground faster, but it will not go as fast as it would with a higher pitch.. however, the higher pitch will cause you to accelerate at a slower rate than the one with a lower pitch.

You have to work out what you want and what is ideal for your flying style. If you want 3D, for instance, you would tend to use something with a lower pitch to get that instant burst of acceleration plus the power to hold a plane in a hover. If you are doing sport flying and don't give two hoots for 3D, then you would move up in pitch to give you better speed, but less initial power. It's a trade off.

Hope that helps.

CGr.

RE: Cap 232
 

No problem being a noob... we all started out somewhere..

Props. Well, perhaps this will help. Props come in sizes, usually measured in inches, perhaps in your area, they are metric.. however, I'll relate it to you as I see it so I don't get the numbers wrong... ;)

Props, as I said, come in sizes. For instance, take the 13-7 prop. That is 13 inches in diameter with a 7 inch pitch. The diameter is self explanatory. The pitch takes some explanation. In this case, a 7, (the second number in the prop size) is the prop pitch. This is the theoretical amount of travel for one complete 360 degree rotation in inches. So, if that prop turns one complete revolution, it will move 7 inches in the air or move7 inches of air through it.

So, ideally, if it is operated at full throttle, take 10,000 RPM for instance, that means that the prop will rotate 10,000 times, or 70,000 inches of air in one minute. That's 5833.333 feet per minute or 97 feet per second, which equates to slightly over 60 miles per hour.

That's the theory of it. Also, consider this. The pitch of a prop is like the gears of a transmission in a car. If you down-shift to a lower gear, then you can pull harder but at a lower speed. As you shift up, to second, third, fourth, your engine has a lower RPM but the car is going at a faster rate, but it does not have the same ability to accelerate as fast as it did using a lower gear.

The prop works the same way. Lower the pitch, you will have faster acceleration, but a lower top end speed, but you will also pull harder. Your plane will get off the ground faster, but it will not go as fast as it would with a higher pitch.. however, the higher pitch will cause you to accelerate at a slower rate than the one with a lower pitch.

You have to work out what you want and what is ideal for your flying style. If you want 3D, for instance, you would tend to use something with a lower pitch to get that instant burst of acceleration plus the power to hold a plane in a hover. If you are doing sport flying and don't give two hoots for 3D, then you would move up in pitch to give you better speed, but less initial power. It's a trade off.

Hope that helps.

CGr.

RE: Cap 232
 

so basically the higher pitch the better air speed? also would I be able to fly slower as more air is moving past wings? I would rather take a while longer to get in the air but be able to speed up and then drop speed to a very slow rate when needed to...

RE: Cap 232
 

Any Cap is not a good first airplane...please get with a more seasoned pilot to help you learn to fly
Props....first off props don't bite, screw or push, or pull air....a prop is an airfoil that produces "lift" horizontally called thrust.....the higher the pitch number the more speed you'll get...to a point. too much pitch and the engine becomes overloaded....like driving a car up a steep hill in high gear....
the lower the pitch number the more pull you'll have going vertical for example....again to a point...too low pitch and the engine won't have enough of a load and will overspeed or the airplane won't get enough speed to fly.....
for landing approaches...you need a nice slow consistant idle......the longer the prop the more drag you'll have slowing you down.....
Good Luck

RE: Cap 232
 

it sound like you need to shelve the cap and get a real trainer and some instruction.

put your zip code in here[link=http://www.modelaircraft.org/clubsearch.aspx]club search[/link]

most larger clubs have student trainers for new guys to try their hand at flying. Think your going to learn to fly from a simulator is just a hopeful delusion, and I'm an avid gamer and sim nut. It helps allot and reinforces what you'll learn from an instructor.

this is the best trainer for the money [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXCXF4**&P=0]tower trainer[/link]

but as I said don't run out and buy it, go find a club, even if it's over an hour drive, talk to them and most likely they or someone in the club will set you up on a trainer box and teach you to fly for free, they will even help set your plane up and test it for you,

RE: Cap 232
 

forgot to mention... this is not my first plane... I currently fly the E-Flite Showtime 4D... its my first Nitro... I am just trying to find out about props and how they work and how the sizes differ and what will do what... so far I got some answers...

RE: Cap 232
 

ok well your pastic premis is diamerter = torque and pitchis like the gears on a car. higher the pitch the more speed you get but also loose power.

4 stroke make allot of torque and little HP so they like large low pitch prop. It also depend on what you waan do with the plane. I've had a couple caps and personlly I prop them like a pattern ship. Large low pitch prop for unlimited vertical. the other end of the spectrum is a quicky ship. acceleration and power is second to raw speed so I'd use a small high pitch prop. 10x9 or 10x10