Arctic: that picture sure gives some clue about the space available in the Monster the 36mm MEGA and 39mm NEU looks very small all of a sudden...
Very cool!

My 7.6x12.5's arrived from Germany....Beautiful work Marcus I am impressed

What worries me is our rough field...the rodents have wreaked havoc on our field over the past several years and every landing is a potential broken prop!

As soon as my new back plates arrive from TT in Texas will be running some tests with these on 6S with the big Mega, which is installed in the plane now.

Originally Posted by arcticflyer

My 7.6x12.5's arrived from Germany....Beautiful work Marcus I am impressed

What worries me is our rough field...the rodents have wreaked havoc on our field over the past several years and every landing is a potential broken prop!

As soon as my new back plates arrive from TT in Texas will be running some tests with these on 6S with the big Mega, which is installed in the plane now.

man those props look rigid NICE..

.

Hi Ralph!
The mold i made was for the 8,2x12,5! I didn' t have made the molds for the small one yet but i have the plugs! If Skip likes the fixed ones i of course can make the folder ;-)! Ciao, Marcus who is still in Hamburg

enjoy your vacation!

Hello fellows, after searching and reading, I finally found a couple of.burned 4025's. My plan.is.to rewind one for speed croco style. I know nothing about rewindind but am willing to take on the job and learn. Question is what wind etc does a rookie need to study, I'm turning a 7 x7 @ 32.5 static and doing 200. What wind type wind and prop size is suggested by you pros for a 6-8s setup?
Tom

First make sure you know how many magnets it has. It could be 8 or 10 and they need to be wound completely different. If it's 10, I'd look at this one - http://www.scorpion.powercroco.de/12...dscorpion.html

Winding the teeth in pairs as Ralph does on YY, makes it easier. You can use shorter wire and you find a short, you don't have to undo as much. You risk a short when the wire ends up near the sharp "T"ends of the tooth and this is more likely if you're really packing in the wire.
Also you can get one if you've left wire too close to the middle and it gets pinched when you put the stator on the bearing tube.

It hurts your fingers and it takes longer than it seems like it should. Be patient and you'll figure it out.

I'm running a stock 1100kv 4025 with 9x20 prop on 5s soon. If I rewind it with the same turns and big wire, maybe I could go as high as 6s, but I'll probably add some turns and go up to 10 or 12s.

Steve C

I'm scoping supplies locally, found a motor shop that has insulator paper, wire. What is the loaded rpm and amps? I tried a 7 x8 today , it didn't unload at all. Arc 36mm

Couple of links I found helpful:

http://www.bavaria-direct.co.za/models/motor_info.htm

http://www.rcgroups.com/forums/showthread.php?t=666877

Originally Posted by ApexAero

Hello fellows, after searching and reading, I finally found a couple of.burned 4025's. My plan.is.to rewind one for speed croco style. I know nothing about rewindind but am willing to take on the job and learn. Question is what wind etc does a rookie need to study, I'm turning a 7 x7 @ 32.5 static and doing 200. What wind type wind and prop size is suggested by you pros for a 6-8s setup?
Tom

Originally Posted by ApexAero

I'm scoping supplies locally, found a motor shop that has insulator paper, wire. What is the loaded rpm and amps? I tried a 7 x8 today , it didn't unload at all. Arc 36mm

Hi Tom,
These 2 posts have really gotten my attention !
1. You are turning a 7x7 @ 32,500 rpm
2. It takes well into 3500 watts to do this with an APC Sport, or are you using a Graupner (which needs less than 2500 watts to turn 32,500) ........... and how many cells are you running ?
3. 7x8 didnt unload at all ............... was this from inflight data, and how long did you run WOT, also what plane of yours has 7x7 @ 32,500 rpm with 200 mph ? (or is that 200 amps) ?

This is no "ordinary power level" data you are looking for ..................... "loaded rpm and amps" ................ do you want in flight data ?

Mopar - I think this is the plane and setup that Apex has been testing:

http://www.rcgroups.com/forums/showthread.php?t=1715245

He might have moved to something else but he was testing some big ARC motors in this plane.

I did some static testing yesterday with the big Mega installed in the Monster. I got close to 3KW at 21,000RPM's and 163 AMPS on a 5S NanoTech 65C/130C with Marcus' 7.5x13 folders. Going to get some kickin 6S batteries from one of my Heli buddies today and do some static at that level. New spinner should be here any day and will get some inflight data at 5 and 6S.

My gosh !!!
I would definately try it on 6 cells with 5 cell data like that on a 1 turn !!
Allmost 260mph pitch speed with 5 cells !!!
Thanks for the links for Apex, I will look now !

Thanks arctic
Mopar, kast I checked it got 2100 watts at 113 amps and 32.5 k rpm static. Arc 36-65-1 2080kv, cc125, genace 4800 60c5s aeronaut 7x7. Apc 7x7 does work better.

My Gosh !!
I have grenaded them Aeronutz 7x7 props at 30k+
Your voltage is about 3.72 per cell ............. those figures are with a full battery, correct ?

How did you get rpm and power levels with the Phoenix 125 as your ESC ?
More specifically, what test equipment did you use ?
Would you be willing to swap in an ICE 100 to see how it does in flight ?
Getting back to your previous posts, how do you know the 7x8 did not unload if running Phoenix 125 ?

I love your balsa scratch build !!