HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 16, 2012, 02:16 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
Quote:
Originally Posted by wildpalms View Post
Since this is the F3P not the foamies or indoor forum I will make a couple of suggestions.

20g motor is heavy. The Axi at 18g all in is really a lot these days (gets away with it on bigger models as so good a motor).

240'ish batteries for sport flying. 180's for flying the schedules.

Servos. Try the next size down. Nothing bigger than 4.5-5.0g on all surfaces. Use 1 aileron servo.

Unless you have built a brick you will need nothing more than a 6A esc. My overweight Helix (120g) runs fine on small esc. Averaging less than 2A on current schedule flight.

One piece wing is ideal for home build but not if you are going to ship any to customers :-)

Dave

Well i haven't built it yet so i can still go for different electronic choices

so how about this motor http://www.hobbyking.com/hobbyking/s...arehouse_.html

and these servos http://www.hobbyking.com/hobbyking/s...sec_Servo.html

i already have 2 180Mah 2s lipos

and i also already own an 8A ESC with 2A BEC


hows That ?


K

P.s now it is a 2 peice wing for Reasons Stated by Wildpalms
Keenan smith is offline Find More Posts by Keenan smith
Last edited by Keenan smith; Sep 16, 2012 at 02:55 AM.
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 16, 2012, 02:54 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
Brett i sent you a PM

K
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Old Sep 16, 2012, 08:52 AM
"Free" in Christ!
Free's Avatar
United States, CA, SF
Joined Jan 2012
852 Posts
Although I have heard lots of good things about the 19T, I would go with a Hacker A10-15S and CC 6. It will pull around a 125 gram plane like a feather. And the combination only weighs ~20 grams.

Servos, I would go with Futabas, Hitecs, and or Diamonds.

Free

P.S. You pay for what you get.
Free is offline Find More Posts by Free
Reply With Quote
Old Sep 16, 2012, 03:36 PM
Professional idiot
Hampshire, UK
Joined Jun 2002
3,119 Posts
Can't comment on those servos in particular. Servos in the size are often a lottery. Suck 'em and see :-)

That Hobby-King motor is very common down here. I know of several models that competed at EIM last year with them. 8x4.3 GWS Slow Fly prop. Can even be machined down on a lathe to save a few grams (I fly with a few people even more anal than me). They last well. I have one in a general knockabout model and I hate to think how many hundreds of flights it has.

I have the Hacker as well. Very noisy and I wasn't too keen on it. Fantastic motor for indoor pylon with the 7" prop though.

8A esc is ideal.

Weight is your enemy and equipment the only real way to get decent savings. Depron Aero saves quite a bit over normal Depron as well.

For the carbon work take a look at models like the Disney. The aileron bracing it uses really works.

Steer clear of real cheap carbon rod as well. Can be very floppy and heavier as well (lower carbon to resin ratio). Quite surprising just how much all the carbon can weigh when you end up with several metres of the stuff.
wildpalms is offline Find More Posts by wildpalms
Reply With Quote
Old Sep 16, 2012, 05:08 PM
"Free" in Christ!
Free's Avatar
United States, CA, SF
Joined Jan 2012
852 Posts
Look at this post, I found it very helpful(and depressing, lol).

http://www.rcgroups.com/forums/showp...5&postcount=96

Free

P.S. Also notice the bracing(kind of complicated)
Free is offline Find More Posts by Free
Reply With Quote
Old Sep 17, 2012, 09:24 AM
Mr. Foam, Tape, and Carbon
RCvehicleGuy's Avatar
Joined Feb 2011
292 Posts
The lighter the better. I watched the ETOC and their airplanes are nbelieveable. I forget who I talked to but one of the guys had a Hacker a10-9l on his with a 10 inch carbon fiber prop. He had his throttle adjusted in the travel adjusts of his radio for thirty percent. His plane was in the sub 120 gram range.
Generally when an F3P plane is made, they will either mill it down till it is almost nothing. Or they will mill it out all the way and put a saran wrap like material over it. All of this is in a life or death attempt at getting as close to nothing in weight as they possibly can. They do anything and everything to make these so ungodly light and fragile. Also, you will likely go through a few prototypes, F3P demands precision down to the inch, this means that a plane cannot have any weird tendencies. Sure a pilot can correct, but judges like to see the plane not only on clean lines, but a clean attitude as well.
F3P is a complicated world, people do different things to get the performance they want. But it all ends up on a couple deciding factors: Does the airplane weigh less than 3.5 ounces? And do you have 200 practice flights on it?
RCvehicleGuy is offline Find More Posts by RCvehicleGuy
Reply With Quote
Old Sep 17, 2012, 09:29 AM
Mr. Foam, Tape, and Carbon
RCvehicleGuy's Avatar
Joined Feb 2011
292 Posts
The link that Free provided shows an example of how unbelievably anal all these F3P guys are. This is why I stick to 3D depron sub 200 gram planes. Just slap it together and go hucking around the yard. The end.

Chris G.
RCvehicleGuy is offline Find More Posts by RCvehicleGuy
Reply With Quote
Old Sep 17, 2012, 09:34 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
Quote:
Originally Posted by RCvehicleGuy View Post
The link that Free provided shows an example of how unbelievably anal all these F3P guys are. This is why I stick to 3D depron sub 200 gram planes. Just slap it together and go hucking around the yard. The end.

Chris G.
You Remind me of Me When i made my 3DDF Genesis... (whacked it together)
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Old Sep 17, 2012, 09:35 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
+ i also Sand my CF Rods Surface's To save some Wieght.
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Old Sep 17, 2012, 09:53 AM
Mr. Foam, Tape, and Carbon
RCvehicleGuy's Avatar
Joined Feb 2011
292 Posts
Quote:
Originally Posted by 3DDFHobbies View Post
You Remind me of Me When i made my 3DDF Genesis... (whacked it together)
Haha! I say I whack my stuff together... Tell me what you think of this model I made up...
http://www.rcgroups.com/forums/showthread.php?t=1618054 Not a SINGLE reply on this one.
Put a lot of work into this one too... http://www.rcgroups.com/forums/showthread.php?t=1582557

Anyways, ya, F3P is kinda complicated. Selling kits is kinda complicated. That is why I just make stuff for myself and post the plans for free on RCGroups. Good luck with your business venture though!

Chris G.
RCvehicleGuy is offline Find More Posts by RCvehicleGuy
Reply With Quote
Old Sep 17, 2012, 12:11 PM
rgj
Registered User
Joined Dec 2010
48 Posts
a good model

If you are building a F3p model that you are going to use in a gym with a bit limited space (from floor to celing) you have to think weight, and milling is a must its not just fancy works, you have to use good light servoes and a light motor and esc, you cant comprimize with anything.
If it is to heavy it will build up speed at downlines to fast , in the gym where I fly at the most its 8 meter under the roof and if you are going to have time for some rolls in the downline it cant weigh to much..if its to heavy its useless.
Thats at least what I found out I had one model that ended up at 125 gr with batteri I found it to heavy.....next was 106gr ..perfect
rgj is offline Find More Posts by rgj
Reply With Quote
Old Sep 17, 2012, 02:10 PM
Inspired by the wings of an An
Andycap's Avatar
Leeds
Joined Mar 2003
1,937 Posts
I have to ask why is the canopy a separate piece? Its another glue joint you just dont need

Andy
Andycap is offline Find More Posts by Andycap
Reply With Quote
Old Sep 17, 2012, 03:07 PM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
Quote:
Originally Posted by Andycap View Post
I have to ask why is the canopy a separate piece? Its another glue joint you just dont need

Andy
Mailing space...
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Old Sep 17, 2012, 03:08 PM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
Quote:
Originally Posted by rgj View Post
If you are building a F3p model that you are going to use in a gym with a bit limited space (from floor to celing) you have to think weight, and milling is a must its not just fancy works, you have to use good light servoes and a light motor and esc, you cant comprimize with anything.
If it is to heavy it will build up speed at downlines to fast , in the gym where I fly at the most its 8 meter under the roof and if you are going to have time for some rolls in the downline it cant weigh to much..if its to heavy its useless.
Thats at least what I found out I had one model that ended up at 125 gr with batteri I found it to heavy.....next was 106gr ..perfect
Im aiming for 100-106g but I'll have to build it as light as possible (without crazy milling ) and Use Aero-brakes to Slow things down ....

K
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Old Sep 17, 2012, 03:37 PM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,830 Posts
You guys Should I Add Some Aero-Brakes?
Keenan smith is offline Find More Posts by Keenan smith
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Find hobby shop open www.f-hobby.com find hobby Hot Online Deals 94 Sep 12, 2014 01:19 PM
Question 3D Hobby Shop OR Twisted Hobbies turboready 3D Foamies 35 Apr 14, 2013 10:32 AM
New Product 3D DreamFactory (3DDF) Genesis 34 BETA TESTERS WANTED! Keenan smith Indoor Pattern/F3P 53 Oct 07, 2012 05:31 PM