If the price tag is 1800 euro I am interested. If you could send me the contact info that would be great.

hello , is there any update , prop/thrust charts?
thx

Originally Posted by bihor

hello , is there any update , prop/thrust charts?
thx

I'm interested too!

Joe

maybe you remember , 2x predator 30-8 made this cricri MC-15 fly during 30 minutes
schultze controller was then the weak point , they burned together in the same time !!
now with schultze 333 , do you think a fiability step will be reached if someone decides to place predator 50 in a true ultralight aircraft? (for a sigleprop aircraft , 30" prop is a little small ... don't know about global efficiency at usual electric aircraft speeds -80-90mph -for such a small prop)
Or maybe this 500A peak (400 continuous) controler , that seems to be the most powerfull in the market , someone knows?
http://mgm-compro.com/index.php?tid=...-32-bit-system

Hi, not much to report. As far as I know I'm still have and use the very first of this motor. Parts were made for a few more and I would like to have one more. However, I'm still waiting for the correct set of prop blades. In the meantime I use a set with to small pitch (13") but I have modified the couplers to get about 17". I logged about 5600 rpm at 50 V and 260 A. Thrust estimated to 550 N static. There is no need for anything bigger than Schulze XXL, the motor can't handle more amps than the Predator 37 as it has the same wire and nb of turns. But as it has lower kv and higher torque, it handles much larger props. The change from 28.5x12 to 34.5x17 give 10 to 15% better prop efficiency. That is what it's all about.

Originally Posted by Pontus Claesson

But as it has lower kv and higher torque, it handles much larger props. The change from 28.5x12 to 34.5x17 give 10 to 15% better prop efficiency. That is what it's all about.

that sounds very good , kV and RPM diminution is exactly the right direction from previous design.
But still regarding aircraft showed in picture , trust me , schultze controlers were the weak point , and just burned in full charge , wherease engines were ok. That's why a 10% increase in Amp with 333 model is welcome , and even this mgm promising controler promises a better margin , safety is a extra requirement in the case someone is inside the aircraft

With regards to the cri cri, was the 30 minute flight done via RC or occupied pilot flight ?
Thanks

Plettenberg have rated the Predator 30/8 at 210A max, while the 37/6 and 50/6 are rated at 310A max.
Jeti (and Hacker/Jeti) have excellent ESC's suitable for these power levels.
Of course, none of these regulators are approved for manned flights.
Magne

Originally Posted by bihor

that sounds very good , kV and RPM diminution is exactly the right direction from previous design.
But still regarding aircraft showed in picture , trust me , schultze controlers were the weak point , and just burned in full charge , wherease engines were ok. That's why a 10% increase in Amp with 333 model is welcome , and even this mgm promising controler promises a better margin , safety is a extra requirement in the case someone is inside the aircraft

I buy in on adding the 10% as a safety margin for P37/6 and P50/6
but it suprises me if the P30/8 could destroy the 40.303.
But with installation in a plane like Cri Cri, I see some trouble with cable lengths.
ESC should be close to LiPo (0,5m) or a massive capacitor bank needs to
be added.
About manned flight, I would never recommend any of the Predators as they
have a relativley weak mechanical design (that of course is a trade of for the low weight)
In particular, the bearing arrangement is far to weak to give relevant
margins for manned flights and other applications with, compared to RC, high
mean load. The P50 uses the same bearings as the other Predators and I expect
the beraings to fail sooner or later. The use of a folding prop is mandatory if you
intend to do aerobatic manouvers like spin and snaps. Plettenberg was reluctant to the use
of fixed prop already on the P30 and P37. But it works but a prop
strike leads in most cases to a bearing failure.

I can ad that the SPIN300 worked very well on the PR37 up to and above 300A. After i believe 4 or 5 years of hard use with fixed props on the Predator 37 i send my motor to Pletti for inspection and service if needed, they asked me "what is wrong with it" and my answer was maby a bearing or two... !?!? so for me both the Terminator and Predator 30 and 37 have worked good on fixed prop, but i have also made sure to use a sturdy mount and carbon props, with a weak prop (wood or plastic) and a sloppy mount that gives flex and vibrations one could wear the bearings very fast.

@magne : yes ,30 min fligh + 15 min reserve WITH pilot , on 8kwh kokam Lipo , see discussion here http://forum.pegase.tv/viewtopic.php...978&start=1290
@pontus : huge condo is behind each engine in the carbon cover , see also on the forum , there's even a picture somewhere
predator is 2kg ... and yes ,advantage is really weight. I have started a electric aircraft project too (40kg heavier ... because I'm not with the same budget http://www.velectris.com/forum/s1812...jet-Rutan.html ), already have an brushless engine , very reliable , very adapted in rpm (around 3000...) ... but 7kg
also regarding batteries , have lifepo4 50kg/5kwh , but if I had to invest in better performances , was thinking about kokam 16ah cells (best density compared to 200ah ones) or NCR panasonic 18650 pack ,harder to make (lot of BMS) but good density and longevity in 2.9ah (better than 3.1ah one)
I also take profit beeing on this forum to ask if it is possible to RC a small aircraft (120kg empty like cricri) with servo used in modelism ... was really thinking about put this and a 80kg manequin for first flights in mine...

A 7kg 3000 rpm motor sounds like a very good choice for ultra light aircraft. Guess it incorporates bearings up to the job to handle a large and efficient prop (+40" ??)
I think the only man carrying application for Predator series would be paragliders, there is every kg of importance as you land on your legs and has to carry all the stuff too. However, the Predator will not get enough cooling in a paraglider if the full power needs to be utilised. A fan unit can solve it but then you add some weight again. Predators as sold and rated are for model use only. But Plettenberg has also an industrial business, many products based on the model motors but of course rated and mechanically executed in a different manner.

Originally Posted by Pontus Claesson

A 7kg 3000 rpm motor sounds like a very good choice for ultra light aircraft. Guess it incorporates bearings up to the job to handle a large and efficient prop (+40" ??)
I think the only man carrying application for Predator series would be paragliders, there is every kg of importance as you land on your legs and has to carry all the stuff too. However, the Predator will not get enough cooling in a paraglider if the full power needs to be utilised. A fan unit can solve it but then you add some weight again. Predators as sold and rated are for model use only. But Plettenberg has also an industrial business, many products based on the model motors but of course rated and mechanically executed in a different manner.

I've been searching around for info on the Predator 50/6 after I found it was the largest motor plettenberg carried in the rc class. After I read your post that it was not suitable for manned applications I became curious to what your thoughts on other similarly powerful rc brushless motors are. I did notice you specifically mentioned that Plettenberg rc motors weren't suitable for manned flight due to their weak mechanical design mainly due to the weak bearing arrangement, so what about motors like the hacker a200? I'm not aware of any other 15kw+ motors besides the hacker that are still relatively lightweight. Would the predator still be a bad choice for applications like manned ornithopters where the rpms are much lower while also likely being used with a gear reduction system? Would you say that choosing a brushless motor designed for bikes/scooters would be a better choice?

I don't know if quality on bike/scooter is good enough.
Guess they are much more cost optimized and do not
have the very best weight to power to efficiency relation
you should look for for an aircraft application.

I don't think Hacker A100-200 is a much better choice, heard about
both failure of bearings and bad magnets.
Made in China...and definitely no to aircraft standards

Are we of topic or entire forum??

I just ordered a Predator 50/6 for my 3.3m CompARF Yak Project!

4 weeks delivery....