jbutkovic-RCU

My Feedback: (16)

A friend of mine has a Great Planes (elec) Learjet. This thing weighs a ton and only has twin 400's that came with the kit. We taxied it around on the street and it seems like there is no way this thing will get off the ground. Can anyone help?? Thanks.

KidVermin

My Feedback: (3)

You mentioned both Kyosho and G/P. Which one ?
I have the Kyosho T-33 where I had to go to 10 cells to get
the stock motor to turn enough rpm. The $225.00 + brushless
motor is out of my budget.
If your friend wants the Lear to perform, he's going to have to
pop for the brushless motors.

Brian C.

My Feedback: (4)

I don't know what you have for power. I have both mentioned palne and both flew great. The Learjet with stock motor, 14 x 2000 with motors are in series. It took off the ground and 5 minutes flight is not a problem. The landing gear has problem, they put them to far forward, the gear should be about 1" further back so it would NOT sits on its tail when you have the CG corrected. The T-33 with stock fan and 7 x 2000 flew fine until the motor gave up after about 200 flights.

jbutkovic-RCU

My Feedback: (16)

The plane has the stock motors but they are wired completely separate (2 speed controls GPesc30's, 2 8x3000 packs). It just doesn't seem like it has the thrust needed. What do you suggest? Thanks.

Brian C.

My Feedback: (4)

8 x 3000 will make the motor draws over 35 amp. The one I have draws about 32 amp on 7 x 2000's. May be the 3000 Nimh can not supply the current. Are these 3000H or 3000HV nimh? Did you adjust the ESC so it is fully on ? I have 14 x 2000 and it goes very well. May be you need a higher rating ESC?

One last stupid question, is the rotor blades on correctly? The convex side faces forward and the concave side towards the back.

Brian

jbutkovic-RCU

My Feedback: (16)

The 3000's are Nimh. H or HV I don't know. The esc's are fully on an the props are on correctly. I don't know about you, but I'm lost. We tried 7x3000's and they were worse!!!

How much room does yours need to get in the air?

Brian C.

My Feedback: (4)

I don't know what to say more, just try some nicad cells. Sometimes the Nimh cell will not put out more than 20 amp or the voltage will dump to nothing. Put a voltmeter on the pack when you run it up and see what is the voltage of the pack.

Try two packs of 7 x 1700's or 7 x 2400 nicad and see. If that does not work, send me the plane and I will try to make it fly!!

jbutkovic-RCU

My Feedback: (16)

I'll try that. If it doesn't work, watch your mailbox!!!!!

Bax

My Feedback: (11)

You'll need to check the actual current your motors are pulling. The Great Planes C-30 electronic speed controls are limited to a maximum of 30 A continuous. If your motors are pulling more than that, then you're limited by the speed controls. You may need to get higher-capacity speed controls to allow your model to fly correctly.

bax

jbutkovic-RCU

My Feedback: (16)

BAX,
How do I check the amperage that the motors are pulling? And how will I know if the speed controls are limiting that? Thanks.

Joe

greggf

change the controllers to 50a units, and the batteries to 16xcp1700's. more power and 8oz's less weight............gregg

jbutkovic-RCU

My Feedback: (16)

Thanks greggf.

Brian C.

My Feedback: (4)

Joe,

Is that mean I won't be getting plane in the mail??

Good luck, like I said, it flys on 14x2000 on one controller(1/2 price of two) and two fans in series.

When the fans are in series, they have to run the same.


Brian

jbutkovic-RCU

My Feedback: (16)

Brian,
I won't be sending it quite yet!!! I'll try that and see how it goes. Thanks. Take care.

Joe

slapshot

My Feedback: (15)

Just flew a club members today. 2-50a ESC, 2-8 cell 2400ma packs. Temp, high 80's, humidity was in the 70%+ range. We have 320' hard surface runway, it took 319' to get off of the ground. Once in the air it flew really nice. Also sounds kinda nifty.

Slapshot

russell2

Experienced jet jockey friend of mine had both the T-33 and Lear from Kyosho. Neither performed very well out of the box, in fact both would barely fly. He converted both to Aveox 1010/2y and different fans, many hundreds of dollars later had something that would perform "as advertised". As an aside, another experienced acquaintance purchased the .15 glo DF powered Kyosho F-86. I watched numerous attempts to fly that lead sled, all of which failed. The first guy has given up electrics, moved on to turbines. Other guy is using the first guy's brushless motors flying "pusher jets". He threw the T-33 and Lear away. Told me other day the experience was becoming less happy every day ( after having Aveox throw magnets in flight ).

Bottom line, some mfgs just sell junk and as long as we continue to buy it they'll continue to shovel the cr*p our way. I know of at least three folks who'll NEVER purchase one vendor's product.

Brian C.

My Feedback: (4)

Russell2

I am not defending the Manufacturer of the above mentioned products. I have a learjet by Kyosho which flew beautiful on the stock motor/fans set up with 14 x 1700 running two motors in series on one speed controller. It only took about 100 feet to get it off the ground. Granted, it is no speed plane like the turbines. But for the 1/10th of the cost of a turbine, it is a very good package. As for the gas powered F-86, I understand it is under powered, but that is gas powered!!