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prime jet 8

Old 09-16-2017, 09:57 PM
  #1  
momo5400
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Default prime jet 8

motor prop drive 2836 3000 Kv , propeller APCspeed 6X4, ESC 60 A, batterry heavy duty 2200 mAh 60C 3S,weight 680 g


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Old 09-17-2017, 01:12 AM
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That looks incredible. What do you estimate your top speed to be on that thing?
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Old 09-17-2017, 06:59 AM
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Originally Posted by Psychron View Post
That looks incredible. What do you estimate your top speed to be on that thing?
estmated top speed 200 km/h but on the next fly i put a gps data logger for measuring the real speed
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Old 09-17-2017, 12:58 PM
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Originally Posted by momo5400 View Post
estmated top speed 200 km/h but on the next fly i put a gps data logger for measuring the real speed
I just bought one of those a little while back. I have yet to use it. I have no idea how lol.
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Old 09-18-2017, 11:21 AM
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Default 240 km/h

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Old 09-18-2017, 06:54 PM
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Thanks for the tip about GPS data loggers, I found one on Ebay that weighs only 15 grams. I will study them and get one when I can.
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Old 09-18-2017, 06:57 PM
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Originally Posted by Wildflyer View Post
Thanks for the tip about GPS data loggers, I found one on Ebay that weighs only 15 grams. I will study them and get one when I can.
Yeah, they're not heavy. Mine came in a blister pack.. kinda has rounded side edges on it and flat along the long edges.

I've gotta open it up and get on it because I have a flying wing with a 6040 on the back, 2 ft wingspan.. keeps up with the gas stunt planes at the field. I'd love to know how fast it is.
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Old 09-19-2017, 01:14 PM
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Old 09-20-2017, 02:20 PM
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Oh yeah that's crazy fast! it's hard to tell in the video but it looks and sounds like I'd be keeping up with you. I bet if you stuffed a 4s in there you'd break some records with it!

By the way, where did you mount the fpv cam for recording?
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Old 09-22-2017, 08:36 AM
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Default the new prime jet

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Old 09-25-2017, 01:59 PM
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Default second test flight

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Old 10-09-2017, 10:51 AM
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Default measurement speed

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Old 10-09-2017, 11:44 PM
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Oh my, I have trouble flying at 100 klm. Mostly I fly 70 - 80 klm.
That is a nice looking little rocket there.
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Old 10-19-2017, 10:56 AM
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Old 11-24-2017, 11:33 AM
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Old 03-06-2018, 02:16 PM
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Old 03-06-2018, 02:27 PM
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One of the biggest problems is to get a speed that is not falsely reported from a dive. Many of the so-called high speed videos on Youtube are in reality not so good for that fact.

Second GPS loggers record GROUND SPEED .. so need a run WITH and AGAINST wind so the two are averaged out to find actual air-speed.

I use the Eagle Tree Pitot sensor which measures airspeed and therefore a single run in any direction is correct.

Nigel
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Old 03-06-2018, 07:08 PM
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Originally Posted by solentlife View Post
One of the biggest problems is to get a speed that is not falsely reported from a dive. Many of the so-called high speed videos on Youtube are in reality not so good for that fact.

Second GPS loggers record GROUND SPEED .. so need a run WITH and AGAINST wind so the two are averaged out to find actual air-speed.

I use the Eagle Tree Pitot sensor which measures airspeed and therefore a single run in any direction is correct.

Nigel
yes but the GPS measure the ground speed and altitude , with this two information you can calculate the distance travelled as a function of time and calculate the real speed but for sure not the airspeed, you are exact only Pitot sensor gives real airspeed
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Old 03-06-2018, 08:31 PM
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Originally Posted by momo5400 View Post
yes but the GPS measure the ground speed and altitude , with this two information you can calculate the distance travelled as a function of time and calculate the real speed but for sure not the airspeed, you are exact only Pitot sensor gives real airspeed
Yves
Airspeed is easy ... just fly with full throttle WITH wind ... and then turn 180 degrees full throttle AGAINST wind ...

Add two speeds together .. divide by 2 = airspeed.

GPS is actually one of my former career subjects and is also an important part of my other hobby - yachting / charting.

Nigel
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Old 07-13-2018, 10:44 AM
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Old 07-13-2018, 02:32 PM
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Almost looks like the Cuda. 275km/h or 165 mph is crazy fast. Figure our field is about 600 ft between tree lines. Your plane would cross our field in just under 2.5 secs. Wham, Bam thank you Ma’am !

Is that a kit or a scratchbuild? I like an adrenaline rush from time to time and have a few +100 mph planes, mainly edf’s but some prop planes too.

Go faster and do more damage ! Lol
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Old 07-13-2018, 06:55 PM
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Originally Posted by dahawk View Post
Almost looks like the Cuda. 275km/h or 165 mph is crazy fast. Figure our field is about 600 ft between tree lines. Your plane would cross our field in just under 2.5 secs. Wham, Bam thank you Ma’am !

Is that a kit or a scratchbuild? I like an adrenaline rush from time to time and have a few +100 mph planes, mainly edf’s but some prop planes too.

Go faster and do more damage ! Lol
thank's dahawk,
it is a scratchbuild (the third version lol, the others is "dead")
Yves

PS: and this one want a refresh
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Old 07-13-2018, 09:09 PM
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Very cool indeed. For sheets and grins, I ordered something that looks similar from HK. About USD $20.00 . It won't go nearly as fast. Maybe half as fast.

https://hobbyking.com/en_us/jet-8-kit-color-b.html

Hawk
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