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Old Nov 26, 2012, 09:21 AM
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MagnusEl's Avatar
Sweden, Gävleborg County
Joined Jan 2004
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Hi all.

HobbyKing does have the Falcon 120 in stock at the new Netherlands warehouse. 185 shipped to Sweden....too bad I already have a few unbuilt planes...

Falcon 120 @ HobbyKing NL
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Old Nov 26, 2012, 01:09 PM
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United States, TX, Schertz
Joined Mar 2006
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HET Motor Question for Brian

Brian:
I am currently flying my Falcon with a Dynamax conversion with the Scorpion 4035 630KV motor on 12S and using one of Tams rotors. I, like you, am getting about 15 lbs of thrust on 12S at about 120 amps and about 5.3KW. Plane flies well but I was looking for a little more speed.

I have a question for you. I have a HET 700-98 motor that is 670KV that I was thinking of putting into my Dynamax EDF conversion. Any thoughts on whether the 700 series motor will hold up to the Dynamax rotor load?

Also, can you share some photos of your EDF conversion. Specifically the "motor mount" you are using?

Thanks,
Ed
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Old Nov 26, 2012, 03:40 PM
aka JetMan Joe
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Hey Ed, are you using the Fighter Cat ESC on your Falcon?
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Old Nov 26, 2012, 05:11 PM
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MCS:

I am not. I am using my Castle 160 amp HV ESC. I have about 80 flights on the CC ESC and I use it primarily to get info on my batteries. I had been flying the Hobby Partz SkyLipo's for about 30 flights but they statred to lay down when flying them on my 127 mm fans. They still seem to work OK on the smaller 70 and 90 mm stuff that uses either four or six S. Since I was not really happy with the performance of the Sky Lipo's on the big fans, I am now testing/using the Turnigy Nanotechs (not the A Spec units) and I have just started flying a battery that is new to me. It is called the Haiyin. It is made in China but the US warehouse is in Henderson Nevada. Their website is : www.haiyinsotore.com. Since I am using these batteries that are new to me I have been using the CC ESC's to collect data. However, I have managed to build a bit of a library on performance data on the two battery brands so I will probably go to the Fighter Cat ESC.

Just FYI, when flying the Skylipos (4S x 3=12S, 5000 mah 30 C) I was getting about 4.2 to 4.5 KW at about 117 amps on these batts on 12S. When I installed the Haiyin (again 4S x 3= 12S and 5000 mah 40C) I got 5.5 Kw initially and then when the voltages settled (about one minute of run time) the power was 5.3 KW at 120 amps. I then used the Turnigy (6s x 2= 12S, 6000 mah 25-50C) and the initial power on start up was about 6KW and when the batts stabilized (again about 1 minute of run time) I was getting about 5.3-5.5 KW. I am really happy with the Nanotechs and the Haiyin. Don't have many flights on the packs yet (about 6 on each of the types) but I am very happy with them. One thing I will say about the Haiyin batteries is that in my one interface with them, they provided OUTSTAANDING customer service. I decided to follow the advice of some on the forum (bri6672 and some others) and break the batteries in per the Bob Violett process. I put six cycles on each of the packs (Haiyin and Nanotechs) before flying them in the Falcon. During the first breakin cycle on the Haiyin, I had one of the 4S packs fail within 2.5 miuntes of running. That evening I sent an e-mail to the factory and the following morning I got an e-mail from Eric @ Herewin New Energy in China asking for a photo of the pack plugged into a watt meter (so they could verify the pack had zero volts). I provided a photo and got a reply instructing the Henderson Nevada warehouse to provide a replacement pack. Three days later I got a replacement pack (no questions asked),an apology from the factory and a 15% discount on the next two packs I purchased. If the packs hold up, then I think that I am a believer. Incidentally, I took the failed pack apart and found the failure (solder joint on the circuit board) and found that it seemed to be much better built than any of the other packs I have opened up. The entire pack (sides, top/bottom and ends) were wrapped in a thin Teflon type material. I am pretty happy with them.

When I remove the CC ESC from the Falcon I am going to install it in a Byron Mig that I am building. I have done a conversion of the Byron fan (my own motor mount) and have installed one of the new HET 800-73 series motors.The KV on this motor is 590. I have one of the conversions running in a friends Byron F-16 and we are getting 4.5 KW at 94 amps on 12S from the unit. Additonally, I am getting 16.5 lbs of thrust and an efflux of about 180 with the stock Byron tail pipe diamater of the F-16 (think it is about 4.5" diamater).

I have two of the FC ESC's. I have the older one (this was one of the early EDF esc's that Ben modified for the plane market). He reduced the size of the heat sink and the ESC weighs 8.5 ounces (compared to the 13 ounce unit for the boat community). It is a 200 amp continuous and 300 amp burst for up to 16S. I have about ten flights on this ESC on the Falcon and it seems to do well. No problems with motor, ESC or battery temps. I got the software from the fightercat website and the programmer from them before they closed up shop.I have another one that I got from Ben. It is a Beta unit that is 16S and is 300 amp continuous and 400 burst but I have not yet run it.

Sorry for the long reply but I thought I would share some info other than the Fighter Cat ESC question you asked.

Ed
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Old Nov 26, 2012, 05:28 PM
aka JetMan Joe
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Thanks Ed, I appreciate the info. I have been doing alot of testing on batteries, I decided to break in a few and then pump alot of current through to evaluate the differences. The most surprising were the Revolectix Diamond series and the Haylin:
http://www.rcgroups.com/forums/showt...3#post23223191

Fortunately I stocked up on Bens EDF ESC's before he dissappeared. I've had excellent results in very demanding installations and thank you for introducing me to the line.
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Old Nov 26, 2012, 05:59 PM
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Joe:

You are welcome. I only wish the products were still available as they were a good alternative to the very expensive 12S+ ESC's out there. Don't mean to hijack the thread, but how are the Revoletrix batts doing?

Ed
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Old Nov 26, 2012, 06:23 PM
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San Diego
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Quote:
Originally Posted by A10pilot View Post
Brian:
I am currently flying my Falcon with a Dynamax conversion with the Scorpion 4035 630KV motor on 12S and using one of Tams rotors. I, like you, am getting about 15 lbs of thrust on 12S at about 120 amps and about 5.3KW. Plane flies well but I was looking for a little more speed.

I have a question for you. I have a HET 700-98 motor that is 670KV that I was thinking of putting into my Dynamax EDF conversion. Any thoughts on whether the 700 series motor will hold up to the Dynamax rotor load?

Also, can you share some photos of your EDF conversion. Specifically the "motor mount" you are using?

Thanks,
Ed
Ed,

I dont think the 700 series would be upto the task of the Dynamax but I have only used a 700 in my jetfan 80 on 6s so its not much of a setup to really test its capabilities but it has worked great in that application.

The motor mount I am using is Tams and you just slide the motor in (after some sanding of the casing if you use an HET 800) and tighten down the carbon tube mounting screws and you are done. Very easy to put together and works great. I have been sidetracked with my JHH A-7 but I will fly the Falcon next weekend and will try to get some video and speed numbers. So far thou I am seriously impressed with this setup and the Nanotech 25c packs are working great at this power level, I hope they hold up cause I would like to run them in my F-15 next year, it will be running at about 150 amps compared to 135 so this is a good test!
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Old Nov 26, 2012, 06:51 PM
aka JetMan Joe
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Quote:
Originally Posted by A10pilot View Post
Joe:
how are the Revoletrix batts doing?
Ed
They seem to perform about the same as my TP 65C's, don't know about longevity yet.
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Old Nov 26, 2012, 07:20 PM
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Guys:

Thanks for the replies.

Ed
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Old Nov 26, 2012, 08:28 PM
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League City, Texas
Joined Sep 2006
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The HET 700-98 series motors are certainly up to the task of a Dynamax. They have more torque than the 800 series.

Check out this thread for all of the motors that have been used to do the e-conversion to a Dynamax.
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Old Nov 26, 2012, 09:25 PM
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San Diego
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Quote:
Originally Posted by SteveC68 View Post
The HET 700-98 series motors are certainly up to the task of a Dynamax. They have more torque than the 800 series.

Check out this thread for all of the motors that have been used to do the e-conversion to a Dynamax.

I forgot about the 98, it should definitly be up to the task, Freds adapter might work with it but not Tams.

Steve, which thread are u referring to?
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Old Nov 26, 2012, 10:20 PM
I make bad look so good.
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Doh!

That's what happens when you step away from the computer in the middle of a post.

http://www.rcgroups.com/forums/showthread.php?t=980280
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Old Nov 26, 2012, 10:31 PM
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Steve/Brian:

thanks for the help/info. I am not worried about an adapter. I make my own and the one I have will accept either the 39mm or a 50mm motors. I think I will try the 700-98 in the Dyanamx and see what I get.

thanks again,
Ed
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Old Nov 26, 2012, 10:43 PM
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San Diego
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The kv on that motor is not ideal, 670 would be a good lower powered 12s option thou, probably around 5k and 105-115 amps. The 780 on 12s is going to be in the 200 amp range if you use the right capacity of batterie (8000-10,000) mahs. You could try 10-11s on the 780 motor to get it in a better range but your going to have to gamble a bit on the batteries....
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Old Dec 03, 2012, 05:12 PM
Extreme CNC Alloy EDF
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Australia
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The 800-73 doesnt seem to lack any torque in my 127mm Ramtec setup, 17lb thrust at 4800 watts on 12s is not too shabby.
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