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Jet Central Cheeta

Old 01-15-2019, 05:52 PM
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JoelP
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Default Jet Central Cheeta

Who has one in stock nib?
Old 01-15-2019, 06:18 PM
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F1 Rocket
 
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Old 01-15-2019, 07:05 PM
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redtail
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Got mine from Nir at www.Nirlybuilt.com His phone is 1-301-257-9888 Just told him about your search. Chic

Last edited by redtail; 01-15-2019 at 07:22 PM.
Old 01-16-2019, 03:16 AM
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tp777fo
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What u building now?
Old 01-16-2019, 04:46 AM
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JoelP
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Flash EVO! Thanks for replies.
Old 01-16-2019, 05:00 AM
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tp777fo
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Will be supersonic and bulletproof. It does have one problem....it snaps. Its the only jet I never mastered. Had 3. I love the way they fly but break out in a cold sweat at landing. Shouldnt be a problem at Seguin. I think the cg can be farther aft than they tell you and may help prevent that.
Old 01-16-2019, 05:00 AM
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tp777fo
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Double clutch...sorry
Old 01-16-2019, 05:39 AM
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JoelP
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Thanks, will keep that in mind. My original Flash never had that trait.
Old 01-16-2019, 07:17 AM
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Default Jet central cheetah

I would give nir a call 301 257 9888
he is one of the largest jet central reps,
very knowledgeable building jets and other RC aircraft.
Old 01-16-2019, 07:28 AM
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JoelP
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What is the spool up time on these Cheetas?
Old 01-16-2019, 08:24 AM
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Not bad. Cant give a no. But its got a ton of push and used little gas. I use Manny at Aeropanda for all my JC stuff. A great guy to work with. He is the US distributor.
Old 01-16-2019, 05:15 PM
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I have a cheetah on my classic Flash that was purchased and installed by Nir. You'll love it. Great power, small and light, spool up time is very quick, and excellent fuel efficiency - I fly for about 8 mins with some reserve fuel left in case of go around.
Old 01-18-2019, 08:16 AM
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About the Flash snapping, My UltraFlash snapped 5 different times on me when making landing approaches, in my first year with it. I learned to stay off the rudder and keep the nose slightly down until a few feet from the ground, then flatten, and then start to raise the nose slightly and then when the mains are on the ground, make sure the nose comes down by itself versus letting off on the Elev. and forcing it down. (I learned this from a very experienced flash pilot who was not having any issues.) Once I got into that routine, I never had another issue with snapping or landing approaches. I do tend to still come in fast as I too am still a bit nerve wracked from the past snaps. I am sure keeping the speed up helps too. But, staying off the rudder helped me the most. After coming in fast, then there is a lot of braking to do. One needs a good brake controller to maintain control, especially with electric brakes. I have tried 4 different E-controllers and currently am about to test the LG15 on the next flight. It seems to be the only one that works well enough to avoid brake dancing.

Cheetahs are great engines. The only thing that I have seen come up with our jet guys that use them is the brushless starter upgrades use a lot of battery. Not sure if the new ones have that solved or not. Have only seen a couple come back from their routine service with the brushless starter upgrade and the owners were really POed cause they could only get two flights off their batteries that used to give them 5 flights before the upgrade. Other than that they seen to be great turbines with lots of power. Very reliable in starts too.
Old 01-19-2019, 01:21 AM
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This s such an easy fix with ALL turbines. I have always used a "jump" battery to start my engines, just "Y" connect a battery through a switch during the start phase you can then get 6 or 8 flights from one ECU battery charge.

m
Old 01-19-2019, 05:02 AM
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Rookie Question: With a jump battery, are you pushing too many volts or amps by using a "Y" connector with the Jump battery and regular ECU battery connected? Chic
Old 01-19-2019, 05:59 AM
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Wire them in parallel to keep the same Voltage. I get 5 flts per charge on mine.
Old 01-20-2019, 01:53 AM
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You have a switch in the circuit so you only start on the jump battery. Then switch over and disconnect the jump battery once the start sequence is complete.

I use a 2000Mah for the flight and a 5000 for the start, that way they both last for weeks. Remember the flight battery is only driving the pump, not the burner and the starter. I also reconnect the jump for the cool down.

m
Old 01-20-2019, 03:48 AM
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redtail
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Could you please draw out your circuit for this rookie. Many thanks. Chic
Old 01-20-2019, 06:45 AM
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JackD
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Originally Posted by Len Todd View Post
About the Flash snapping, My UltraFlash snapped 5 different times on me when making landing approaches, in my first year with it. I learned to stay off the rudder and keep the nose slightly down until a few feet from the ground, then flatten, and then start to raise the nose slightly and then when the mains are on the ground, make sure the nose comes down by itself versus letting off on the Elev. and forcing it down. (I learned this from a very experienced flash pilot who was not having any issues.) Once I got into that routine, I never had another issue with snapping or landing approaches. I do tend to still come in fast as I too am still a bit nerve wracked from the past snaps. I am sure keeping the speed up helps too. But, staying off the rudder helped me the most. After coming in fast, then there is a lot of braking to do. One needs a good brake controller to maintain control, especially with electric brakes. I have tried 4 different E-controllers and currently am about to test the LG15 on the next flight. It seems to be the only one that works well enough to avoid brake dancing.

Cheetahs are great engines. The only thing that I have seen come up with our jet guys that use them is the brushless starter upgrades use a lot of battery. Not sure if the new ones have that solved or not. Have only seen a couple come back from their routine service with the brushless starter upgrade and the owners were really POed cause they could only get two flights off their batteries that used to give them 5 flights before the upgrade. Other than that they seen to be great turbines with lots of power. Very reliable in starts too.
That is not normal. Typical consumption with the brushless starter is not different. My cheetahs and Rhinos are in the 450 mah per flight, so I do 6 flights per charge on a 3800mah battery. Talk to Manny about your problem, something weird is going on if you are using over a 1500mahs per flight. Maybea some huge restriction on your fuel system?

what battery are you using?


Old 01-20-2019, 07:53 AM
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The two turbines that came back from routine service with the brushless starter upgrade that had the high power usage issue are NOT mine. I have two different members that experienced this issue last year. I just helped with their starts as their spotter and listened to their comments. I will pass this discussion on to the one that is still flying jets. The other one gave up on jets last year. I do NOT know if this issue had anything thing to do with that decision.

Using switches and jump starts just seems unnecessary to me. Never needed to do it with my 6 turbines. Actually, one of the manufacturer's instructions specify not using a switch in the turbine's power source. IMO, switches are just another potential single point of failure. Most of the switches on the market can't handle the current that is required anyway. I do use PBox soft switches, which also shuts off the ECU. PBox soft switches fail on. All three of my jets only use about 400 - 500 mah on the turbine power source for a start/flight. I normally get at least 3 flights on an OEM's 2100 mah LiFePo4 s. (LiFePo4 chemistry is designed for high current applications, by the way.) But, I have run 4 start/flights on them, when I forgot to swap them out a couple times. For the Sprint, I get 8 starts on the 5700 mah LiPo before the starts get iffy. The Sprint averages about 400 mah per 10-12 minute flight on the turbine power source. For my situation, jump starting is NOT keeping it simple. So, I agree that the issue we are discussing is NOT normal or at least should not be.
Old 01-24-2019, 04:18 PM
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JoelP
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Does the Jet Central lifetime warranty cover the electronic components of their turbines?
Old 01-24-2019, 04:32 PM
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Yes it does. Everything but the HDT (hand data terminal). I have two Cheetah SE'S in my two Flashes. Just an incredible combo!
Old 01-24-2019, 08:20 PM
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JoelP
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Thanks for all the info! Gonna get one.
Old 01-25-2019, 03:25 PM
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https://www.aeropanda.com/products/c...-36-lbs-thrust
Old 01-25-2019, 03:37 PM
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Originally Posted by JackD View Post


That is not normal. Typical consumption with the brushless starter is not different. My cheetahs and Rhinos are in the 450 mah per flight, so I do 6 flights per charge on a 3800mah battery. Talk to Manny about your problem, something weird is going on if you are using over a 1500mahs per flight. Maybea some huge restriction on your fuel system?

what battery are you using?


I agree with Jack. Bought my Cheetah last October at Best in the West. It has the brushless motor. I typically get 6-8 flights per charge on my BVM F-16. The battery size is 3800mah. Other than reliability, smooth starts and fast throttle response, the sound the turbine makes while quick accelerating and decelerating is uniquely cool.

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