PDA

View Full Version : Here’s a “What works list”


jrb
09-02-2005, 07:27 PM
The following is updated from this post ( http://www.rcgroups.com/forums/showpost.php?p=1352292&postcount=4 ) and also referenced in this article ( http://www.rcgroups.com/links/index.php?id=4485 ):

Here’s a “What works list” for an economical way to fly a 40ish plane using 2 RC Car “Six Packs” (about 33 amps, 6 minutes-plus duration w/2000s):


Motor:
Trinity Maxx Mild (not the Wild!):
http://www2.towerhobbies.com/cgi-bi...p?&I=LXWR55&P=7

When brushes are needed do this -- Brush upgrade to 5x5:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXBPF6&P=0

Spare armature:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXWR58&P=7


Gearbox – must be 3.5 to 1:
Master Airscrew Gearbox (what I use):
http://www2.towerhobbies.com/cgi-bi...p?&I=LXZ900&P=7

Or,

Great Planes Gearbox:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXSL79&P=7

Pinion required – 13T 48 pitch
http://www2.towerhobbies.com/cgi-bi...p?&I=LXEX11&P=7


Speed Control:
Jeti JES045 ESC – 12 & BEC:
http://www.hobby-lobby.com/jeti.htm


Propeller:
APC “E” 13x10:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXZL01&P=7


Batteries:

Always best to buy what you can see:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXST62&P=7
The Six Packs:

Always best to buy what you can see:

Two Six Packs of GP3300s come boxed together from SMC ( http://www2.towerhobbies.com/cgi-bi...p?&I=LXDPD2&P=0 ), they’re excellent with 8 to 10 minutes of duration!

Also, DuraTrax does a 6 pack of Sanyo RC2400s ( http://www2.towerhobbies.com/cgi-bi...p?&I=LXST62&P=0 ).


Something cheap like this might work; I flew an E-Maxx boxed set of 2000 packs that were supposed to be Sanyo, they flew like Duratrax Sanyos:
http://www2.towerhobbies.com/cgi-bi...p?&I=LXCLS6&P=7


I’ve flown the red, white and blue plane in this photo with the above; more info can be found in my gallery, here (others are electric too!): http://www.rcgroups.com/gallery/showgallery.php?ppuser=497&cat=500

jrb
09-02-2005, 07:54 PM
I would like to add consider getting your battery pack from MEC of Zapped & Pasted cells in a Solderless Power Tube(s) -- http://www.modelelectronicscorp.com/ !

The latest I’ve gotten from Pete are GP3700s; the best Sub C cell to date. Volts and duration are great!

Picked up better than an Amp over GP3300s; which were better than the P3000s by an equal amount. And, the P3000s did better than were better than Sanyo R2000 NiCds.

Pasting blows away welded cell performance by a couple of amps. Zapping adds too!

Yes, that almost 8amps for Z&P 3700s compared to welded NiCds.


The A size 2000s compare favorably with LiPos in price, weight and duration. SPTS are also available for these.


PS: If you get an MEC SuperBox you’ll be able to use it with the added power of a brushless when upgrading in the future.

bwillhite
09-08-2005, 02:50 AM
I agree with the MEC battery packs. I have been flying a .30-sized heli conversion on 2 8-cell packs of the GP3300...they are great!!! 200+ cycles and still going stong.

Hmmm...might just have to build a trainer...

Great info!

Brian

Gouda
09-09-2005, 01:40 PM
So, in spite of what we read everywhere, it is possible to put EP in a 40 sized plane with out spending $$$$ on lipo's and brushless motors?? That is great info. I meant I guess I knew it, but it all seemed a mystery. The motors have not held me back as much as the large lipo packs.

bwillhite
09-09-2005, 02:22 PM
jrb,

Do you have any detailed pics of how the motor and battery are mounted?

Brian

jrb
09-09-2005, 06:14 PM
Note that my 12cell setup were done to make use of off the shelf 6cell packs that can be found in the RC Car section of a local hobby shop – two in series. And, that the ESCs that were selected could do BEC on 12.

A lot have folks have had great success with the 10cell (not too available off the shelf) Endo set-up; a lot of thread can be found over here: http://www.rcgroups.com/forums/showthread.php?t=411858&goto=newpost .


Here’s a shot of the a motor and gearbox mounted in a .40 engine mount via a clamshell mount; 1” BL shown, and the Maxx Mild fits similarly with a clamshell as well.

Batteries lay in the bottom of the plane; about mid span of the former at the wing’s leading edge (shift fore/aft for proper CG); Both the Eagle and American Flyer have hatches the give access to “tank area” which allows easy change of the battery packs.