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All Forums >> RC Airplanes >> RC Jets >> Turbine Clinic >> SimJet Turbine Direct Support >> Simjet and Lithiums
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Simjet and Lithiums - 1/26/2004 5:33:49 PM   
Modelman



Posts: 392
Joined: 12/14/2001
From: Fisher, IL, USA
Status: offline 		Hi Ed and Kevin,

Quick question...

I'm thinking about converting the SJ's to Lithium's.

The supplied battery is 9.6V. LiPO's are available in 7.4V and 11.1V configurations.

Are either of the LiPO configurations acceptable?

Curious minds...

Thanks!

Craig

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RE: Simjet and Lithiums - 1/26/2004 5:54:14 PM   
KevinM



Posts: 285
Joined: 1/8/2002
From: Toronto, ON, CANADA
Status: offline 		Hi Craig,

That's pretty good timing! I just finished putting the connector on an 11.1V Duralite (LiIon) pack for evaluation. (I don't think the 7.4V pack will have the umph to complete a startup, and may not give full throttle on FW200 equipped 3000's and 2300's.)

So far everything looks like it should work out, but I'll advise of my findings.


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Kevin McLeod

(in reply to Modelman)
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RE: Simjet and Lithiums - 1/26/2004 6:07:33 PM   
Modelman



Posts: 392
Joined: 12/14/2001
From: Fisher, IL, USA
Status: offline 		Thanks Kev,

I'll await your findings!

Craig

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(in reply to KevinM)
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RE: Simjet and Lithiums - 2/3/2004 3:34:25 PM   
Edgar Perez



Posts: 1183
Joined: 12/1/2001
From: San Lorenzo, PUERTO RICO (USA)
Status: offline 		Hi Kevin,

Any updates?

On a related note, my 2300 came with a 1200maH batterry pack. In average, how many "8-10" minutes flight can be done without recharge. (Assuming recharging with a "safe" margin, maybe only using 50% of capacity before recharge)

Thanks,
Edgar

PD: Expect first light-off in ~ 2 weeks

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Edgar Perez
Puerto Rico

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       Post #: 4

RE: Simjet and Lithiums - 2/6/2004 12:00:32 AM   
MLaCoste



Posts: 853
Joined: 8/29/2002
From: Roseville, CA, USA
Status: online 		Edgar-

I cycled the battery that came with my 2300 three times using a Triton charger before the first start. My battery lasted 2 runs before needing a recharge. I plan on replacing the 1200maH with a 3000maH pack.

Mark

(in reply to Edgar Perez)
       Post #: 5

RE: Simjet and Lithiums - 2/6/2004 1:26:20 AM   
Edgar Perez



Posts: 1183
Joined: 12/1/2001
From: San Lorenzo, PUERTO RICO (USA)
Status: offline 		Thanks Mark!

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Edgar Perez
Puerto Rico

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RE: Simjet and Lithiums - 2/6/2004 1:29:01 AM   
lov2flyrc



Posts: 4626
Joined: 12/6/2001
From: New Smyrna Beach, FL, USA
Status: offline 		Mark,
I can confirm there are no issues with using the Duralite 11.1V on the Simjet 1200, we have run this engine/batt combo for 8 flights so far without a charge. Data says we can easily fly 10 flights without charging but the larger engines may consume more MAH per flight. The higher voltage of the LI pack is not an issue and does provide very relaible and consistant starts.
Regards,
Todd

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RE: Simjet and Lithiums - 2/6/2004 1:34:11 AM   
Edgar Perez



Posts: 1183
Joined: 12/1/2001
From: San Lorenzo, PUERTO RICO (USA)
Status: offline 		Hi Todd,

Do you give the full 11.1V to the ECU or it goes down thru regulator? Do you know if the 1200 ECU is the same as the one for 2300?

I'm also inclined to replace the battery with one of higher capacity.
Regards,
Edgar

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Edgar Perez
Puerto Rico

(in reply to lov2flyrc)
       Post #: 8

RE: Simjet and Lithiums - 2/6/2004 1:36:49 AM   
Kevin Greene



Posts: 2675
Joined: 3/28/2002
From: Jackson, TN, USA
Status: offline 		Edgar,

Let me know if the FOD screen works for you. If it does then let us know as it would be beneficial to all SimJet owners of turbines of this size. (2300)

Kevin

(in reply to Edgar Perez)
       Post #: 9

RE: Simjet and Lithiums - 2/6/2004 1:51:27 AM   
Edgar Perez



Posts: 1183
Joined: 12/1/2001
From: San Lorenzo, PUERTO RICO (USA)
Status: offline 		Just sent you an email on that.

I received the FOD screen. It fitted perfectly! thanks,

There is no need to make holes for the fuel/propane lines as they go into the case well after the FOD screen. Starter hole was also right on.
Perfect for the 2300.
Thanks,
Edgar

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Edgar Perez
Puerto Rico

(in reply to Kevin Greene)
       Post #: 10

RE: Simjet and Lithiums - 2/6/2004 2:03:36 AM   
Kevin Greene



Posts: 2675
Joined: 3/28/2002
From: Jackson, TN, USA
Status: offline 		That's great news, Edgar!!! I enlarged the hole in the rubber ring for the starter motor by 1/8th of an inch vs the JetCat engines to accomodate the larger starter motor housing. So, the mounting legs of the starter motor cleared the screen too??? What other SimJet engines are similar in size to the 2300???

Kevin

(in reply to Edgar Perez)
       Post #: 11

RE: Simjet and Lithiums - 2/6/2004 12:19:36 PM   
Edgar Perez



Posts: 1183
Joined: 12/1/2001
From: San Lorenzo, PUERTO RICO (USA)
Status: offline 		Here is a photo of it.

Attachments
Click to see fullsize image.
Click for fullsize


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Edgar Perez
Puerto Rico

(in reply to Kevin Greene)
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RE: Simjet and Lithiums - 2/6/2004 4:50:41 PM   
Modelman



Posts: 392
Joined: 12/14/2001
From: Fisher, IL, USA
Status: offline 		Hi Kevin,

The 1700, 2300, Sonic 120 and 3000 all have identical exterior dimensions.

Craig

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"Successful people DO what unsuccessful people don't!"

(in reply to Kevin Greene)
       Post #: 13

RE: Simjet and Lithiums - 2/9/2004 1:12:06 AM   
lov2flyrc



Posts: 4626
Joined: 12/6/2001
From: New Smyrna Beach, FL, USA
Status: offline
quote:

ORIGINAL: Edgar Perez

Hi Todd,

Do you give the full 11.1V to the ECU or it goes down thru regulator? Do you know if the 1200 ECU is the same as the one for 2300?

I'm also inclined to replace the battery with one of higher capacity.
Regards,
Edgar

Edgar,
No regulator needed. The ECU does not have a problem with the slight voltage increase. I am not sure if there are any differences with the ecu voltage wise between the 1200 and the larger engines but I dont imagine there is. Ed and Kevin can confirm....
I have switched everything I fly over to Duralites on both the RX and ECU pack. Even switched my TX pack over, I can now fly all day without charging anything. I have more than doubled the flights I do per flying session since I switched. I have to drive 1.50 hrs to fly so when I do get to go I want to get as many flights as I can in
Todd

_____________________________

Owner/President: Dreamworks Model Products LLC
www.dreamworksrc.com 386-852-4793

(in reply to Edgar Perez)
       Post #: 14

RE: Simjet and Lithiums - 2/9/2004 2:18:45 AM