beginner dictionary. - Page 22 - RC Groups
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Apr 26, 2012, 10:19 PM
Fly it or Fix it

Beeping Question


Thanks balsa or carbon,
I'll give that a try. All help is appreciated.

Don
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Apr 27, 2012, 12:08 PM
Fly it or Fix it

Beeping Question


YEA! Problem solved. I love it when I learn something, even if it is as simple as throtle position. Thank you balsa or carbon.

Don
Apr 28, 2012, 01:43 AM
IMO ( In My Opinion ) →
balsa or carbon's Avatar
Quote:
Originally Posted by gaffrig
YEA! Problem solved. I love it when I learn something, even if it is as simple as throtle position. Thank you balsa or carbon.

Don
You're welcome!

Al
Jun 20, 2012, 02:52 PM
Registered User
OK ... what is RET?
Jun 20, 2012, 02:55 PM
Registered User
Quote:
Originally Posted by oddshot
OK ... what is RET?
rudder/elevator/throttle
used on basic trainers and electric sailplanes
Last edited by phil alvirez; Jun 20, 2012 at 07:09 PM.
Jun 20, 2012, 06:26 PM
Registered User
Thanks ...
Jul 26, 2012, 10:41 PM
Po' boys does w/ Po'boys ways
haxawsnavy's Avatar

Stall Dive/$ Glider???s


Hello all,I've been wanting to do this for some time.I've been working on a $ store "Foamie" glider that I think I can make somewhat funtional,with added details such as filling mold marks,reshapeing wings,tail, n fuse (eventually add static) wing mounted engines,etc...Question is ,as I make changes ,I test "glide" it. IT ALWAYS, from a horazontal launch,..with/into/no breaze, curves upward, stalls n dives. is nose/tail to heavy? How to check C.O.G.and where it SHOULD be on any future type glider's I've seen I'd like to "experiment" with to be R.C.ed .I'm brand new to planes,but I KNOW the answers are here on RCG.forum..thx Tim
Jul 26, 2012, 11:57 PM
Matt Mabry
Pickle72's Avatar
http://adamone.rchomepage.com/cg_calc.htm
Try that. Its more than you need but its cool.
Basically a good place to start is 25% of cord. So take how wide the wing is at the root and figure out what 25% is and measure back from the leading edge. Of course if there are a ton of other things to consider but that is a starting point.

This is a good read too.
http://www.rcpowers.com/community/th...ch-build.6220/
Lots more out there. Do a google search for "finding CG on scratch built RC model" or something similar.

Hope this helps
Matt
Jul 27, 2012, 12:33 AM
Po' boys does w/ Po'boys ways
haxawsnavy's Avatar

aircraft Calcuator


Hey ,Thankyou Pickle, I'll learn to use it well. I have something like this for scale converstions.Don't worry about "overloading' me, The more I GET the more I LEARN thats why I'm here on R.C.G.....Tim..P.S( I can always ask )
Jul 27, 2012, 12:42 AM
Po' boys does w/ Po'boys ways
haxawsnavy's Avatar

aircraft calculator


Also thx for the PDQ! reply .All will be tested...Tim
Aug 16, 2012, 08:59 PM
Registered User
Chuckf2000's Avatar
What do they mean when they say 'park flyer' and, say, 'a 40 size aircraft?'

Thanks
Aug 18, 2012, 10:04 PM
AMA 994002
matiac's Avatar
What is "expo" and "rate"? And why are they important to know??
Aug 21, 2012, 10:28 AM
Matt Mabry
Pickle72's Avatar
A parkflyer is any small electric RC aircraft that can be safely flown at a small park/soccer field. Any ultra micro electric airplane/heli would more than fit into this category(also fits into the gym/indoor flying category). Small electric's of about 48" wingspan or lower with low to medium speed would also fit. Basically if it is too big and too fast and too loud to not be able to stay in a soccer field or two than its not a park flyer.

When someone is referring to an aircraft as a 40 size or 60 size etc., they are referring to the size of the nitro motor on it. A 40/60 size nitro plane is a good size 50-60" wingspan airplane and should probably be flown at a local club field.

Expo is referring to the amount of deadband around center you program into your transmitter. The more expo the less twitchy the aircraft is when you move the sticks just a little past center, but responds the same as the stick are moved. Its a non-linear movement done in the transmitter.

Rate is referring to dual rates on the transmitter. You can have dual and triple rates on some transmitters. If the manufacture recommends that the elevator only moves 1" up or down you can have low rates be half of that. So if you go full throw on the elevator it only moves 1/2" so the model is less responsive to pitch. But at a flick of a switch it will be in high rates and you will get the full 1" in throw.

I hope this helps a bit.
Some great links that explain all this better than I can.

http://www.rcpowers.com/community/th...rates-do.9657/

Transmitter Dual Rate and Expo Theory, Part 1 of 2 (8 min 28 sec)


http://en.wikipedia.org/wiki/Park_flyer

http://www.rc-airplane-world.com/
Sep 07, 2012, 02:14 AM
Registered User

Thanks


Very helpful for this noobie
Sep 10, 2012, 09:29 AM
Registered User
poziovahim's Avatar

battery


Hey All,
what is the significance of the C-rating of batteries? What would a 4S 2200mah 20C battery do compared to the exact same battery but a 40C instead?
Many Thanks,
Dan