FUNJET
11-26-2008, 09:43 PM
#351
Senior Member
Join Date: Jan 2004
Location: Kuala Lumpur, MALAYSIA
Posts: 10,489
Likes: 0
Received 2 Likes
on
2 Posts
RE: FUNJET
ORIGINAL: rino
Tianci, do you know what your AUW was. I want to be able to have a responsive light feeling plane. I'm not into lead sleds.
Maybe I should get another Stryker?
Tianci, do you know what your AUW was. I want to be able to have a responsive light feeling plane. I'm not into lead sleds.
Maybe I should get another Stryker?
11-26-2008, 10:26 PM
#352
My Feedback: (121)
Join Date: Mar 2003
Location: Lincoln,
CA
Posts: 733
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
Hmm, I wonder what a Funet would be like on 4s with a Mega25/3 and a 7x7 or 7x8 sport.
7x8 55 amps 142 mph pitch speed 99 oz thrust. It should climb as fast as it is horizontal.
7x8 55 amps 142 mph pitch speed 99 oz thrust. It should climb as fast as it is horizontal.
12-09-2008, 01:14 PM
#353
Junior Member
Join Date: Feb 2006
Location: WarwickNot Applicable, UNITED KINGDOM
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
Hi Guys
I am in need of some advise from all you leccy experts
I have just finished my funjet with the following setup
Flightpower 2500 3cell 20c
28-47-2700kv bl motor(purple power)
45 amp speed controller(purple power)
6x4E apc prop
I havent got a watt meter and was wondering if the chosen prop would be ok and what sort of performance i would be looking at.
Many thanks to you all
Rob
I am in need of some advise from all you leccy experts
I have just finished my funjet with the following setup
Flightpower 2500 3cell 20c
28-47-2700kv bl motor(purple power)
45 amp speed controller(purple power)
6x4E apc prop
I havent got a watt meter and was wondering if the chosen prop would be ok and what sort of performance i would be looking at.
Many thanks to you all
Rob
12-09-2008, 01:57 PM
#354
Senior Member
Thread Starter
Join Date: Nov 2004
Location: Spartanburg,
SC
Posts: 1,261
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
wover
You should be OK
You can also try APC 5.5x4.5 little less amp draw little more speed.
If the plane is straight stock with no add ons (carbon fiber etc.) you will be in the 80-90mph range
6x4 will give more thrust for climbs
5.5x4.5 is balance of thrust and speed
6x5.5 would be max for your ESC and batt.
I don't have a watt meter, I just touch and feel. Make sure you balance all props.
With a larger ESc and larger batt. ma you can push more amps.
Is this motor rated for 4-5 cells?? If yes then you can Really get things screaming
Cp
You should be OK
You can also try APC 5.5x4.5 little less amp draw little more speed.
If the plane is straight stock with no add ons (carbon fiber etc.) you will be in the 80-90mph range
6x4 will give more thrust for climbs
5.5x4.5 is balance of thrust and speed
6x5.5 would be max for your ESC and batt.
I don't have a watt meter, I just touch and feel. Make sure you balance all props.
With a larger ESc and larger batt. ma you can push more amps.
Is this motor rated for 4-5 cells?? If yes then you can Really get things screaming
Cp
01-01-2009, 12:18 PM
#356
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
Hey all you guru funjetter's, HAPPY NEW YEAR! I hope santa brought you all some FJ's under your tree, for the next year's flying season!....
Got a question for you, in your opinion, what is the set up for the FASTEST FUN JET SETUP??? Motor, Esc, prop, & lipo battery???
Thanks Paul
Got a question for you, in your opinion, what is the set up for the FASTEST FUN JET SETUP??? Motor, Esc, prop, & lipo battery???
Thanks Paul
01-01-2009, 12:34 PM
#357
Senior Member
Join Date: May 2002
Location: Orlando, FL
Posts: 244
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
I'm in...
Motor Scorpion HK 2221-12
Value Hobby 4S 2200mh
Scorpion 35 amp ESC v2.
Scorpion motor calc states amps in the 21 amp range with APC 4.7x4.2
Bench tested on APC 4.7.425 and was getting close to 39-40 amps.
Bench tested on APC 4.75x4.75 and was getting 42 amps.
This was on a fully charged pack. Looks like I may be pushing the esc a bit on the 4x75x4.75.
But this is not average voltage. I wonder if I will get some unload in flight.
Still have not maiden. I'm hoping with in the next day or two..
Motor Scorpion HK 2221-12
Value Hobby 4S 2200mh
Scorpion 35 amp ESC v2.
Scorpion motor calc states amps in the 21 amp range with APC 4.7x4.2
Bench tested on APC 4.7.425 and was getting close to 39-40 amps.
Bench tested on APC 4.75x4.75 and was getting 42 amps.
This was on a fully charged pack. Looks like I may be pushing the esc a bit on the 4x75x4.75.
But this is not average voltage. I wonder if I will get some unload in flight.
Still have not maiden. I'm hoping with in the next day or two..
01-01-2009, 12:36 PM
#358
Senior Member
Join Date: Jan 2004
Location: Kuala Lumpur, MALAYSIA
Posts: 10,489
Likes: 0
Received 2 Likes
on
2 Posts
RE: FUNJET
Fastest? Look for those guys in RCGroups who fly 6S at 175 mph etc. For me the FJ fuse is not made for speed. I have gone 6S and its a waste of time. Wing loading is bad and I am only running on 6S 1,800 mAh packs ... for a hot 6S set up you want to run no less than 3,700 mAh packs ... you can imagine the wing loading. I would say best set up is a 3S 2,500 mAh pack with something like a Mega 16/15/3. You can try 4S too with a 28mm motor of about 2,300 KV. I tried all the above set ups and I still say its most enjoyable with a 3S set up and the Mega 16/15/3.
Here is a pic of my pal's FJ, I just built it for him. Its got a Mega 16/15/3, DualSky 60A ESC and will turn a 5x5 prop.
Here is a pic of my pal's FJ, I just built it for him. Its got a Mega 16/15/3, DualSky 60A ESC and will turn a 5x5 prop.
01-01-2009, 01:20 PM
#359
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
tianci, do you know what the speed is? I am running a Mega 16/15/2 ,80Amp esc 4S 2350 lipo, 5.7X3 apc, and it seems pretty quick. Climb rate is BALLISTIC with the 5.7X3! I haven't radar'd it yet, but plan to do it soon...Paul
01-02-2009, 03:47 AM
#361
Senior Member
Join Date: Jan 2004
Location: Kuala Lumpur, MALAYSIA
Posts: 10,489
Likes: 0
Received 2 Likes
on
2 Posts
RE: FUNJET
Paul ... I estimate about 85 mph on level flight but I am very conservative. Maybe 95 tops. I may be wrong as I am conservative about speed. Your 16/15/2 set up on 4S is nuts! You must be pulling about 60+A with ease. I am kinda tired of pushing planes like the FJ hard, its pointless. The diminishing returns are very real ...
Example ... on a 4S set up I got like around 750W ... I went to 6S and got like 1,100W ... increase in speed? Maybe 20 mph max ... but the wing loading suffered and handling was not that nice. For me ... 3S to 4S max with light motors. Then you can zip around fast or cruise around slowly to enjoy how smooth she flies.
I hope to maiden her this weekend and will get a video up. I finally bothered to use YouTube! Heheheehee ...
Example ... on a 4S set up I got like around 750W ... I went to 6S and got like 1,100W ... increase in speed? Maybe 20 mph max ... but the wing loading suffered and handling was not that nice. For me ... 3S to 4S max with light motors. Then you can zip around fast or cruise around slowly to enjoy how smooth she flies.
I hope to maiden her this weekend and will get a video up. I finally bothered to use YouTube! Heheheehee ...
01-03-2009, 11:29 AM
#362
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
Tianci, yeah, this plane is NUTS! But, it is soo much fun! I am drawing right around 80 amps! I think the speed is probably around 100-110mph. I hope to radar it soon, and will let you know what it's mph is.
I was making a speed pass at about 50 ft altitude, and just started a turn, when the FJ looked like it EXPLODED in the air, right in front of me! Shocked, i just watched as it tumbled to the ground! ..Out of the corner of my eye, i saw something fly forward, and heard a "thunk"....When i walked over to the FJ, it was FINE, no damage at all! What happened, was the velcro holding down the lipo was gone, and also the battery! The battery fell out, and being tail heavy, the FJ just tumbled end over end! Would you believe we CAN NOT FIND THE LIPO!! a bunch of us guys have looked all over, for that battery, and can't find it! it was a fairly new 3300 3s...DARN!! He-He, another tale for the FJ record book! Paul
I was making a speed pass at about 50 ft altitude, and just started a turn, when the FJ looked like it EXPLODED in the air, right in front of me! Shocked, i just watched as it tumbled to the ground! ..Out of the corner of my eye, i saw something fly forward, and heard a "thunk"....When i walked over to the FJ, it was FINE, no damage at all! What happened, was the velcro holding down the lipo was gone, and also the battery! The battery fell out, and being tail heavy, the FJ just tumbled end over end! Would you believe we CAN NOT FIND THE LIPO!! a bunch of us guys have looked all over, for that battery, and can't find it! it was a fairly new 3300 3s...DARN!! He-He, another tale for the FJ record book! Paul
01-03-2009, 05:33 PM
#363
Senior Member
Join Date: May 2002
Location: Orlando, FL
Posts: 244
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
ORIGINAL: LowKey3D
I'm in...
Motor Scorpion HK 2221-12
Value Hobby 4S 2200mh
Scorpion 35 amp ESC v2.
Scorpion motor calc states amps in the 21 amp range with APC 4.7x4.2
Bench tested on APC 4.7.425 and was getting close to 39-40 amps.
Bench tested on APC 4.75x4.75 and was getting 42 amps.
This was on a fully charged pack. Looks like I may be pushing the esc a bit on the 4x75x4.75.
But this is not average voltage. I wonder if I will get some unload in flight.
Still have not maiden. I'm hoping with in the next day or two..
I'm in...
Motor Scorpion HK 2221-12
Value Hobby 4S 2200mh
Scorpion 35 amp ESC v2.
Scorpion motor calc states amps in the 21 amp range with APC 4.7x4.2
Bench tested on APC 4.7.425 and was getting close to 39-40 amps.
Bench tested on APC 4.75x4.75 and was getting 42 amps.
This was on a fully charged pack. Looks like I may be pushing the esc a bit on the 4x75x4.75.
But this is not average voltage. I wonder if I will get some unload in flight.
Still have not maiden. I'm hoping with in the next day or two..
I got my maiden in. I got clocked a 92mph on dive into a level pass with the APC 4.7x4.2 Fast enough for me..
The APC 4.75x4.75 was more thrust but did not feel as fast as the 4.7x4.2 the radar guy was not around at the
time with this prop. Maybe next time.
01-04-2009, 04:31 AM
#364
Senior Member
Join Date: Jan 2004
Location: Kuala Lumpur, MALAYSIA
Posts: 10,489
Likes: 0
Received 2 Likes
on
2 Posts
RE: FUNJET
Paul ... you are nutz! Hahahahahaa ... I may get another when its back in stock. This time I will use my HET 2W-25 on 4S and a coarser pitch prop. 
01-04-2009, 01:43 PM
#365
My Feedback: (1)
Join Date: Dec 2002
Location: Co. Donegal, IRELAND
Posts: 2,760
Received 0 Likes
on
0 Posts
RE: FUNJET
Flew mine for the first time today, went great on first flight, on the second just before I was about to land it spun in, reciever is dead but not certain yet if that caused it.
My nose is broken and front part out of shape, how can you get it back in shape, can it be heated, or one of our guys mentioned putting it in boiling water
My nose is broken and front part out of shape, how can you get it back in shape, can it be heated, or one of our guys mentioned putting it in boiling water
01-04-2009, 09:01 PM
#366
Senior Member
Thread Starter
Join Date: Nov 2004
Location: Spartanburg,
SC
Posts: 1,261
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
ORIGINAL: Xairflyer
Flew mine for the first time today, went great on first flight, on the second just before I was about to land it spun in, reciever is dead but not certain yet if that caused it.
My nose is broken and front part out of shape, how can you get it back in shape, can it be heated, or one of our guys mentioned putting it in boiling water
Flew mine for the first time today, went great on first flight, on the second just before I was about to land it spun in, reciever is dead but not certain yet if that caused it.
My nose is broken and front part out of shape, how can you get it back in shape, can it be heated, or one of our guys mentioned putting it in boiling water
Cp
01-04-2009, 09:03 PM
#367
Senior Member
Thread Starter
Join Date: Nov 2004
Location: Spartanburg,
SC
Posts: 1,261
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
I'm running a Mirco Dan 2800kv on mine. I have turned up to a 5.5 by 5.5 on 4 cells with no issues. Motor is under 100 deg. and so are batts. Runs a 60 amp ESC.
01-04-2009, 09:58 PM
#369
Senior Member
Join Date: May 2002
Location: Orlando, FL
Posts: 244
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
I would have run a hotter motor, but the 2221-12 was what I had on hand. My 4 cell batteries are 2250mah at 20C.
I can only get 45 amps continuous out of those. I'm happy for now at 90+mph and everything runs cool.
I was turning heads at the field with a foamy. LOL..
I can only get 45 amps continuous out of those. I'm happy for now at 90+mph and everything runs cool.
I was turning heads at the field with a foamy. LOL..
01-05-2009, 10:06 PM
#370
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
I was flying the FJ today, and on a speed pass, it made a horrible shrieking noise, and something came apart, and fell onto the runway. I coasted the FJ in, and when I looked at the bird, there was nothing on the back end of the motor! The motor shaft was broken clean off. I walked down the runway and picked up the prop, and when I looked at the prop collet, it had a gouge in it! It looks like when it "shuddered", the collet caught on the hold down screw, and snapped the motor shaft. I called Mega motor usa, and they said I have to send it to the factory in the Czech Republic! (i'm not to thrilled about that). So it is in the mail to them now...... Now, I need a motor for the FJ, And I am thinking of ordering the Mega 16/25/2 to try it out. I was running the Mega 16/15/2 on a 5.7X3 prop, 2350mah 4S drawing 83 amps! We tried to radar it sunday, but couldn't get a clock on it. When I get it flying again, I plan to put some aluminum foil on the wing leading edge, so i can get a better "hit" from the radar gun. Anyone know of any motor that compares with the mega 16/25/2 for a cheaper price??
Thanks, Paul
Thanks, Paul
01-06-2009, 04:10 PM
#371
Senior Member
Thread Starter
Join Date: Nov 2004
Location: Spartanburg,
SC
Posts: 1,261
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
ORIGINAL: paulfrmphoenix
I was flying the FJ today, and on a speed pass, it made a horrible shrieking noise, and something came apart, and fell onto the runway. I coasted the FJ in, and when I looked at the bird, there was nothing on the back end of the motor! The motor shaft was broken clean off. I walked down the runway and picked up the prop, and when I looked at the prop collet, it had a gouge in it! It looks like when it "shuddered", the collet caught on the hold down screw, and snapped the motor shaft. I called Mega motor usa, and they said I have to send it to the factory in the Czech Republic! (i'm not to thrilled about that). So it is in the mail to them now...... Now, I need a motor for the FJ, And I am thinking of ordering the Mega 16/25/2 to try it out. I was running the Mega 16/15/2 on a 5.7X3 prop, 2350mah 4S drawing 83 amps! We tried to radar it sunday, but couldn't get a clock on it. When I get it flying again, I plan to put some aluminum foil on the wing leading edge, so i can get a better "hit" from the radar gun. Anyone know of any motor that compares with the mega 16/25/2 for a cheaper price??
Thanks, Paul
I was flying the FJ today, and on a speed pass, it made a horrible shrieking noise, and something came apart, and fell onto the runway. I coasted the FJ in, and when I looked at the bird, there was nothing on the back end of the motor! The motor shaft was broken clean off. I walked down the runway and picked up the prop, and when I looked at the prop collet, it had a gouge in it! It looks like when it "shuddered", the collet caught on the hold down screw, and snapped the motor shaft. I called Mega motor usa, and they said I have to send it to the factory in the Czech Republic! (i'm not to thrilled about that). So it is in the mail to them now...... Now, I need a motor for the FJ, And I am thinking of ordering the Mega 16/25/2 to try it out. I was running the Mega 16/15/2 on a 5.7X3 prop, 2350mah 4S drawing 83 amps! We tried to radar it sunday, but couldn't get a clock on it. When I get it flying again, I plan to put some aluminum foil on the wing leading edge, so i can get a better "hit" from the radar gun. Anyone know of any motor that compares with the mega 16/25/2 for a cheaper price??
Thanks, Paul
Medusa research V2 line of motors
High End Tech. ....HET
ARC..... I think they are HET made but lower price ...same quality...not sure and I have not used them. I have seen them in action how ever.
01-06-2009, 09:56 PM
#372
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
CP, thanks for the info.. I did order a $29.95 KB28-47-08S 4900kv motor from Hobby City, to try out. this is similar in "specs" to the Mega 16/25/2 Will let you know how it works when i get it...Paul
01-13-2009, 07:52 PM
#373
Senior Member
My Feedback: (7)
Join Date: Jan 2002
Location: los osos,
CA
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
RE: FUNJET
Update from my post #362.... My lost 3300 mah lipo has been found!...... My friend was "weed wacking" the grass around our perimeter fence, and as he looked down, low & behold there lay my battery! It landed
WAY BEYOND where we were originally looking for it...about 70 yards from where the plane came down!
And, it is in good shape, except for a few scratches, all the cells were still at 12.2Volts! Life is good!
Paul
WAY BEYOND where we were originally looking for it...about 70 yards from where the plane came down!
And, it is in good shape, except for a few scratches, all the cells were still at 12.2Volts! Life is good!
Paul
01-13-2009, 08:19 PM
#374
RE: FUNJET
16/25/2 is a 2650kV motor. Is that what you are looking for?
A 5.7x3 on a16/15/2 would draw 140+ amps on 4S.... Your battery couldn't deliver that much, only 83 amps as you say. You are pulling over 35C at 83 amps!!!! You have killed that battery and are lucky you didn't have a fire!!!! You're also lucky to still have a ESC....
A 16/15/2 is designed for a 4.1x4.1 on 3S.
If you are going to run a 2350mA 4S you should rethink your motor and prop combo. I would consider the Ammo 28-45-3600kV motor from Tower too...
http://www3.towerhobbies.com/cgi-bin...?&I=LXLWY5&P=7
A 5.7x3 on a16/15/2 would draw 140+ amps on 4S.... Your battery couldn't deliver that much, only 83 amps as you say. You are pulling over 35C at 83 amps!!!! You have killed that battery and are lucky you didn't have a fire!!!! You're also lucky to still have a ESC....
A 16/15/2 is designed for a 4.1x4.1 on 3S.
If you are going to run a 2350mA 4S you should rethink your motor and prop combo. I would consider the Ammo 28-45-3600kV motor from Tower too...
http://www3.towerhobbies.com/cgi-bin...?&I=LXLWY5&P=7
01-14-2009, 05:00 AM
#375
Senior Member
RE: FUNJET
I have ordered this motor: http://www.hobbycity.com/hobbycity/s...idProduct=4200 and a 40 amp regulator. I will be running 4.1-4.1 prop and 2200-2500 3 cell 30-40C lipo. From the reviews of this motor this shoulg give me 30 000 rpm+ at about 30 amps on that prop. I will also test out 4.5-4.5
I know this is not a extreme setup, but I hope it will give me a fun, relatively fast and light wing loading Fun Jet. It doesn`t cost a fortune either
Any comments regarding the motor?? Too weak, to high kv...????
I know this is not a extreme setup, but I hope it will give me a fun, relatively fast and light wing loading Fun Jet. It doesn`t cost a fortune either
Any comments regarding the motor?? Too weak, to high kv...????