Originally posted by kallend
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Official Freewing JAS 39 Gripen 80mm EDF Jet
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Originally posted by ArmorBolt View PostHi everyone, newbie here and just got my Grippen with Vector Thrust.
There was one comment on the Grippen VT motionrc comment that mentioned "Twitching servo fix" and the buyer mentioned that ".. The servo cables go right along the motor wires under the tail and we ended up having a twitching yaw servo on the thrust vectoring due to interference whenever we throttled up. Almost had a catastrophic crash on the first take of.."
Before assembling it with VT, is there any concern I should be aware of like placement or shielding it regarding this issue.
Thanks in advance for any comments and looking forward to flying the Grippen soon.
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Originally posted by Evan D View PostWell... All the servo wires go aft along the top of the fuselage, on top of the ESC, along the motor and the wing servo wire then go outboard and the rudder and TV servos wires continue aft. If you were worried you should be concerned with all of them. That person probably had one bad servo or all the servos would show effect.
I found the review you are quoting which also says "I slightly changed the position of the extension plug under the tail and made sure the servo wire plugs were extra tight which resolved the issue.".
Sounds like he may not have plugged the servo in tightly.
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Well... All the servo wires go aft along the top of the fuselage, on top of the ESC, along the motor and the wing servo wire then go outboard and the rudder and TV servos wires continue aft. If you were worried you should be concerned with all of them. That person probably had one bad servo or all the servos would show effect.
I found the review you are quoting which also says "I slightly changed the position of the extension plug under the tail and made sure the servo wire plugs were extra tight which resolved the issue.".
Sounds like he may not have plugged the servo in tightly.
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Hi everyone, newbie here and just got my Grippen with Vector Thrust.
There was one comment on the Grippen VT motionrc comment that mentioned "Twitching servo fix" and the buyer mentioned that ".. The servo cables go right along the motor wires under the tail and we ended up having a twitching yaw servo on the thrust vectoring due to interference whenever we throttled up. Almost had a catastrophic crash on the first take of.."
Before assembling it with VT, is there any concern I should be aware of like placement or shielding it regarding this issue.
Thanks in advance for any comments and looking forward to flying the Grippen soon.
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Raced a high performance Vulcan today. It’s was either a match or my Gripen was a bit faster. With the new EDF unit it’s really come alive.
I also did a unrestricted take off like I do with the mirage.
later a did a top end climb starting 20-40’. I made it to 832’ before she stalled out. I had just enough to nose her over.
still getting 4-5 minutes of flight off the 6000.
Gravy
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I just hope that there isn’t a mass rush to buy them when they become in stock at motion. I need two more for my F-14.
Gravy
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LOL It's the new FW that is coming in the new F9F-8.
Gravy
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Originally posted by Airguardian View Post
Is that a Freewing or FMS 2150kv EDF?
Reference please?
He called me yesterday and told me the Grippen flew awesome with the new power plant, it's top secret.
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Originally posted by Gravythe clown View PostHoly cow what a difference with the 2150 12 blade unit. I measured 1lb thrust difference between the stock and the new unit. That was 1 lb measured while in the gripen.
Put 4 packs through her today. 2 hrb 6000 50c and 2 hrb 5000 50c.
4 + minutes mixed throttle but lots of vertical and horizontal pinches. She climbs like the mirage now. So much that I have yet to stall her vertically.
GPS measured my highest climb at 662’ and my fast speed at 124.3 mph. The speed was captured by diving down after vertical at 50% throttle then punching it to 100% after leveling out.
Reference please?
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Originally posted by Gravythe clown View PostHoly cow what a difference with the 2150 12 blade unit. I measured 1lb thrust difference between the stock and the new unit. That was 1 lb measured while in the gripen.
Put 4 packs through her today. 2 hrb 6000 50c and 2 hrb 5000 50c.
4 + minutes mixed throttle but lots of vertical and horizontal pinches. She climbs like the mirage now. So much that I have yet to stall her vertically.
GPS measured my highest climb at 662’ and my fast speed at 124.3 mph. The speed was captured by diving down after vertical at 50% throttle then punching it to 100% after leveling out.
seams like the sweet spot is at the 70% throttle range. More flights will tell.
5000 packs flew the same but only 3+ minutes of flight.
im putting 2 of these in my 14 now.
Gravy
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Holy cow what a difference with the 2150 12 blade unit. I measured 1lb thrust difference between the stock and the new unit. That was 1 lb measured while in the gripen.
Put 4 packs through her today. 2 hrb 6000 50c and 2 hrb 5000 50c.
4 + minutes mixed throttle but lots of vertical and horizontal pinches. She climbs like the mirage now. So much that I have yet to stall her vertically.
GPS measured my highest climb at 662’ and my fast speed at 124.3 mph. The speed was captured by diving down after vertical at 50% throttle then punching it to 100% after leveling out.
seams like the sweet spot is at the 70% throttle range. More flights will tell.
5000 packs flew the same but only 3+ minutes of flight.
im putting 2 of these in my 14 now.
Gravy
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I got me a new FW 2150 12blade unit coming that I’m going to try in my Gripen. Flew today stick 6s and hopefully next weekend with the new unit looking to see if it’s the little extra I’ve been looking for.
Gravy
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You're welcome. Please let us know where you end up with your balance and set up.
E
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I fly with about the stock amount and centered at about the stock spot. I did go in and put longer servo arms on the canard servos and put Z bends on the pushrods but did that to get further canard travel for air brakes on the ground, flying throws for canard pitch and roll are about the book rate. I tried roll without canards and preferred it with. Some on here pooh pooh that since the full scale doesn't have roll on canards.
Originally posted by Yellowred View PostThanks Evan D, ill move my c of g back a little, do you fly with a lot of canard movement? I Have mine down to about 70% but it still looks like a lot of movement? Thanks
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Thanks Evan D, ill move my c of g back a little, do you fly with a lot of canard movement? I Have mine down to about 70% but it still looks like a lot of movement? Thanks
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