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Old May 30, 2012, 09:10 AM
Michael Paxton is offline
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Hey Ya'll!! Watch THIS!!
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Originally Posted by Knife Liddle View Post
Shhhhhhsh, man, you woke me up

besides you misspelled cwaftsmen
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Old May 30, 2012, 10:19 AM
corsair nut is online now
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fly like an EAGLE ;)
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sorry i forgot to get back to you, yes, a 1.5y. but im also using the HET 1500kv in my other jetfan at about the same amps, and maybe even a little better performance in my het F-20



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Originally Posted by heliclown View Post
PS
Read the post suggested, and noticed it was a 1415 1.5Y, not a 2Y. the difference in kv is 1500 to 1100.Can you confirm which motor used is correct?
Thanks Mate, i am about to order motor tomorrow
Steve
Old May 30, 2012, 08:30 PM
heychas is offline
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"My grandma wants to fly jets"
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I noticed on the EJF website they recommend their 1680kv motor with their fan for 8s. Similarly, the Arc 36-75-1 is 1680kv and it gets between 2.5 to 2.75w on 8s with both the wemo and 9305 fans. Perhaps as KL said, the 1500kv is only good for Jetfan.
Old May 30, 2012, 11:11 PM
AIR SALLY is online now
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deltas are cool
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im sure the 1680 would work too .but then you'd need a 100 esc ,and flights would be shorter.the 1500 gives lower amps (80-85) and longer flight.seems to be a happy system ...think i could even use 4000 batts for a lighter airframe.
Old May 30, 2012, 11:20 PM
evo101 is offline
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are there any more photos of this baby floating around?
Old May 30, 2012, 11:29 PM
Knife Liddle is online now
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Lee Liddle
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Quote:
Originally Posted by heychas View Post
I noticed on the EJF website they recommend their 1680kv motor with their fan for 8s. Similarly, the Arc 36-75-1 is 1680kv and it gets between 2.5 to 2.75w on 8s with both the wemo and 9305 fans. Perhaps as KL said, the 1500kv is only good for Jetfan.
If you like the performance of Brent`s XL, I`d say go with the 1500kv. Nothing like duplicating a proven system to get exactly what you want, and you could always add a cell for a little extra kick when you want it.
Old May 31, 2012, 12:26 AM
CRCJA is online now
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wannabe Jet guy
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Blades


It also has a lot to do with the pitch of the blades and the number of blades.

BTW. I am in search of a JetFan 90 if anyone has one they like to part with.

Ralph

Quote:
Originally Posted by heychas View Post
I noticed on the EJF website they recommend their 1680kv motor with their fan for 8s. Similarly, the Arc 36-75-1 is 1680kv and it gets between 2.5 to 2.75w on 8s with both the wemo and 9305 fans. Perhaps as KL said, the 1500kv is only good for Jetfan.
Old May 31, 2012, 12:48 AM
AIR SALLY is online now
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deltas are cool
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Ralph try pm'ing Mike Warren. 2 performance edf. or pm Rainer
Old May 31, 2012, 05:45 AM
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1500 kv


Thanks fellas, for your input, i have decided to go with the 1500kv HET 700-68 motor, with Jetfan 90 on 8S, like Corsairnut.( I like the idea of longer flights and lower amps.
Steve
Old May 31, 2012, 10:36 AM
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Hi guys,
I got very interest in this jet, but reading this post and the EJF building manual, saw many building tips and attentions points that are not difficult to solve using some quality materials and careful build.

The only thing that got real concern was the elevator stab flutter. And my idea is always use the simplest solution, removing the elevator moving part and replacing with a strait one. This way we have vey little change in the look and finishing with the difference between the center and the tip. A peace of trailing edge balsa glassed and painted is the easiest way to solve the problem.

Also I am thinking about using the HET 700-68 1500KV on Hyperion 4200 10S 45C batteries. What you suggestions about this setup?

Oliver
Old May 31, 2012, 10:46 AM
Robert Belluomini is online now
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2017 EDF Jet Jam, June 15-18
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It seems to me the elevator tapers at middle to allow enough up elevator travel!
Old May 31, 2012, 10:51 AM
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or they just drew out a stab shape with a double taper that looked cool and then said oh crap, how do we make this work with one servo......oh I know lets make the hinge line straight across.

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Originally Posted by Robert Belluomini View Post
It seems to me the elevator tapers at middle to allow enough up elevator travel!
Old May 31, 2012, 11:04 AM
Knife Liddle is online now
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Lee Liddle
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I think it's some of both. On the smaller S90 there is a clearance issue on up elevator.
Old May 31, 2012, 12:27 PM
olivergottlieb is offline
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Looking at this picture elevator travel won’t be a problem., the elevator extension will be after the exhaust, and as there will be more surface, less throw will be need.
Old May 31, 2012, 12:58 PM
AIR SALLY is online now
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deltas are cool
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if the elev trailing edge moves up into the efflux from the tail pipe you will have vectored thrust ,.....can you say touchy Elev.


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