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Ziet
10-24-2006, 09:27 PM
I am yet another new member to this site and new to Electric Flight, having flown ic for many years. I have a RIPMAX SPITFIRE but as yet have no motor etc. Can anyone suggest a good motor, speed controller and a Li Po setup. I would like as much power as possible, without being too silly.

Ziet:confused:

Sky Sharkster
10-27-2006, 02:08 AM
Hello Ziet, Welcome to Wattflyer! This question came up a few months ago here, from Treadstone. I found a very long thread on RCG and linked it here; http://www.wattflyer.com/forums/showthread.php?t=6733&highlight=ripmax+spitfire
Hope this helps!
Ron

rcers
10-27-2006, 02:16 AM
I use the Hyperion 3013/16 turn 985KV motor with 3s 2500MAh battery. 28 amps with a 10x7 apc-e prop and it goes like stink. Scarey fast...very nice

Mike

vampire67
10-30-2006, 12:21 PM
We have/had a number of Ripmax Spitfire and P51 in our club (http://www.mfv-biebertal.de/php/dls.php?do=d&id=34 [!! large video file]).
All a flown with a 1500kV Mega 22/20/3e that fits like a charm.
Battery are usually 3s 3200..4900 (also some 8x4200 Intellect NiMh).
Props range from 10x7 (folding ! 60A peak !! very hot !!!) to 9x5.
best compromise seems 9x6 (~45A).

kind regards Peter

rcers
10-30-2006, 02:08 PM
Why on earth would you pump 60amps into a plane that only needs 25-30? Yow! That must be spectacular.....

Mike

vampire67
10-31-2006, 07:10 AM
Why on earth would you pump 60amps into a plane that only needs 25-30? Yow! That must be spectacular.....

Actually it was a mistake when selecting the prop. I'm currently down to 9,5x5.
However the vertical performance was great. :D

With the 9,5x5 I need a bit speed to go vertical and it's limited.
The WOT with 10x7 was seriously shortened too.

I fly only the P51 and it has much more drag than the Spit. Hence the Spit needs less current.
I have a RBC La5 with similar eliptical wing as the Spit. It flies much better and needs only an average of about 22A for a great performance.


kind regards Peter

Ziet
11-02-2006, 07:02 PM
Thanks to everyone for the replys they have been very helpfull....... I don't suppose anybody has an pictures of the power installation It would appear that I need to CUT the front of the SPIT to accommodate the motor!!!

kahloq
11-06-2006, 01:40 AM
Thanks to everyone for the replys they have been very helpfull....... I don't suppose anybody has an pictures of the power installation It would appear that I need to CUT the front of the SPIT to accommodate the motor!!!

You do not need to cut anything regarding the cowl. The motor is mounted to the plate at the front that has the two holes. Depending on the motor, you may have to reverse the shaft. Axi motors are a direct bolt in. E-flite motors work great too, but the shaft has to be reversed.
I used an E-flite Power 15 with an 11x7 APC prop. The esc is a 60amp Castle Creations, but a 45 amp would work fine. The battery setup I use is two 2100 Thunder Power 3cell batts in parrellel for 4200 total mah. The plane has absolute vertical and cruises at 1/2 throttle for good scale flying.
You do NEED to make sure you put air exits somewhere on the fuse, or the esc will heat up really fast and may shutdown.
Here is mine. I placed some airscoops(airexits) in various places both to get more air in and to get the hot air out. I did not use the stock spinner as it is flimsy, instead I used a 2" Dubro. The batts are lined up one in front of the other and fit perfectly.

kahloq
11-07-2006, 04:54 PM
Here are some picture links for anyone wanting to see how the motor would be installed:

http://www.rcgroups.com/forums/attachment.php?attachmentid=775081

In this frontal pic....notice the two holes on either side of the larger hole in the middle. Stick the shaft of the axi through that center hole and use two bolts from the front going through the two small holes into the axi motor.
http://www.rcgroups.com/forums/attachment.php?attachmentid=765740
Here is another pic showing motor installed. Note the two black hex screws going through the wood front area(this is where the two small holes are) for which hold your axi motor in place. You may need to cut a small hole somewhere on the motor mount to get the wires to pass through(I did). This pic also shows the builder using fiberglass to reinforce the motor mount. Not required, but not bad idea either.
http://www.rcgroups.com/forums/attachment.php?attachmentid=727363
2nd angle
http://www.rcgroups.com/forums/attachment.php?attachmentid=727362
This pic here shows another engine installation. Note, this is the HK Spitfire...it is the same basic plane as the Ripmax, with a slightly different motor cage and cowl...but you can see the motor orientation and this is how it would go into the Ripmax.
http://www.rcgroups.com/forums/attachment.php?attachmentid=620258