T28 Trojan
03-29-2010, 08:11 PM
#901
Class Clown
Join Date: Sep 2007
Location: Montclair, California
Posts: 4,472
if it is, your better off with a 4cell and a 8x8 prop,
3cell 12x6e
79oz thrust
38mph pitch speed
49amps
509watts
4cell 8x8e prop
49oz thrust
79mph pitch
45amps
625watts
on 3cell, you could also try a 9x10 prop... apc makes them... that would give you plenty of speed and decent thrust SK
3cell 12x6e
79oz thrust
38mph pitch speed
49amps
509watts
4cell 8x8e prop
49oz thrust
79mph pitch
45amps
625watts
on 3cell, you could also try a 9x10 prop... apc makes them... that would give you plenty of speed and decent thrust SK
Last edited by ministeve2003; 03-29-2010 at 08:40 PM.
03-29-2010, 08:21 PM
#902
Super Contributor
Join Date: Jul 2008
Location: Pflugerville, TX
Posts: 2,338
Originally Posted by ministeve2003
I couldn't find that motor, are you sure it's not the 1100kv version?
SK
SK
04-02-2010, 06:59 PM
#909
Super Contributor
Join Date: Aug 2005
Location: Sugar Grove
Posts: 2,748
It was a bit winder than that. My guess is 18 gusting to about 25 MPH. I had to bring her in at almost full throttle until about 1 ft. off the ground, then land at about 1/2 throttle until all 3 wheels were on Terra Firma. It ws a blast flying in the wind.
CTD
CTD
04-08-2010, 04:50 PM
#910
The UK's Red Baron
Thread Starter
Join Date: Aug 2008
Location: UK
Posts: 78
Any idea guys as to why my 7 cell NIMH Spitfire battery won't charge? Charger says the charging is complete after about 5 minutes, when it obviously isn't. I had this problem with my Super Cub battery's (yes, both of them) as well. Here in the UK we get given the car chargers so i don't know if that makes any difference.
04-08-2010, 07:23 PM
#911
Class Clown
Join Date: Sep 2007
Location: Montclair, California
Posts: 4,472
Originally Posted by JoeTheFlyer
Any idea guys as to why my 7 cell NIMH Spitfire battery won't charge? Charger says the charging is complete after about 5 minutes, when it obviously isn't. I had this problem with my Super Cub battery's (yes, both of them) as well. Here in the UK we get given the car chargers so i don't know if that makes any difference.
SK
04-08-2010, 09:08 PM
#912
The UK's Red Baron
Thread Starter
Join Date: Aug 2008
Location: UK
Posts: 78
Originally Posted by ministeve2003
Discharge it, then charge it back up really slow... Nimh's are known for false peaking...
SK
SK
04-09-2010, 08:04 PM
#913
Super Contributor
Join Date: Aug 2005
Location: Sugar Grove
Posts: 2,748
It shouldn't matter if it's a car charger. As long as the charger is made to charge NIMH batteries. How many Mah's is the pack? Just choose a charge rate at about 1/2 of 1C. Then discharge the battery all the way to cut off and re-charge again at the low rate. You may have to do this 3 or 4 times.
CTD
CTD
04-09-2010, 10:36 PM
#915
Super Contributor
Join Date: Sep 2006
Posts: 3,050
Originally Posted by ministeve2003
How low does the charger go? try .2 or .3 (yea, I know it'll take all day)
SK
SK
Clint
04-10-2010, 12:07 PM
#916
The UK's Red Baron
Thread Starter
Join Date: Aug 2008
Location: UK
Posts: 78
Yeah Clint i'm just going to have to sit in the car for an hour and keep re-connecting it. Went as low as .2A yesterday and it still indicated full charge after about 10 minutes. I'll charge at 1.4A and keep re-connecting it; it's the only way 
.
.
04-10-2010, 12:09 PM
#917
The UK's Red Baron
Thread Starter
Join Date: Aug 2008
Location: UK
Posts: 78
Originally Posted by Crash Test Dummy
It shouldn't matter if it's a car charger. As long as the charger is made to charge NIMH batteries. How many Mah's is the pack? Just choose a charge rate at about 1/2 of 1C. Then discharge the battery all the way to cut off and re-charge again at the low rate. You may have to do this 3 or 4 times.
CTD
CTD
.
04-10-2010, 02:49 PM
#918
The UK's Red Baron
Thread Starter
Join Date: Aug 2008
Location: UK
Posts: 78
Hmmm ill leave the battery on a trickle charge and peak it that way. I have two 7 cells NIMH's (8.4v) batteries as well, are they too much of a risk to use in the spitfire? (Powered normally by a 9 cell 10.8v NIMH).
05-16-2010, 07:12 PM
#919
dumo01
Join Date: Mar 2009
Location: Columbus, Ohio
Posts: 775
T28 Motor mount breakdown
Had an issue a couple months ago with the bell housing of my stock T28 motor developing some cracks, that opened up to the point that the vibration backed out a couple of the screws securing the motor to the mount. Decided to just bite the bullet and bought a new motor since I was not sure I could get a reliable repair.
When I put the new motor in the plane, I wanted to make sure the screws would not back out so I put a little thread locker (blue medium strength) on each motor mount screw. Flew the plane shortly afterward and all was well. Was going to fly it a couple weeks later, and on preflight found the motor was loose on the mount. Flew a different plane that day and when I got it home found the motor mount was badly cracked which I did not understand since it had not been crashed. Took a couple days to get a new motor mount and when I statrted to do the replacement found that the plastic of the failed mount was very brittle and pretty much falling apart as I handled it doing the work, especially right around the screw holes. Rechecked the thread locker bottle and sure enough, there in the fine print on the back of the bottle is " Not for use on Plastic"
Note to self:
RTFM for ALL products:o
When I put the new motor in the plane, I wanted to make sure the screws would not back out so I put a little thread locker (blue medium strength) on each motor mount screw. Flew the plane shortly afterward and all was well. Was going to fly it a couple weeks later, and on preflight found the motor was loose on the mount. Flew a different plane that day and when I got it home found the motor mount was badly cracked which I did not understand since it had not been crashed. Took a couple days to get a new motor mount and when I statrted to do the replacement found that the plastic of the failed mount was very brittle and pretty much falling apart as I handled it doing the work, especially right around the screw holes. Rechecked the thread locker bottle and sure enough, there in the fine print on the back of the bottle is " Not for use on Plastic"
Note to self:
RTFM for ALL products:o
05-18-2010, 12:15 AM
#920
Member
Join Date: Nov 2006
Posts: 210
Yup, thread locker actually creates more problems when used in plastic. Try lining the thread holes in the firewall with a bit foam safe superglue, then retap clean screws. Sometimes I've had success "retapping" screws into foam/plastic with this method.
05-30-2010, 01:00 AM
#923
Super Contributor
Join Date: Jul 2008
Location: Pflugerville, TX
Posts: 2,338
MkVI - 'Tabasco Thunder' almost complete.
Motor: Turnigy 35-48 - 900Kv
Battery: Rhino 3s 3700mAh 25C
Prop: APC 11x10 e
450 watts... good top speed... still a blast to fly - this is my 4th Trojan.
Motor: Turnigy 35-48 - 900Kv
Battery: Rhino 3s 3700mAh 25C
Prop: APC 11x10 e
450 watts... good top speed... still a blast to fly - this is my 4th Trojan.
05-30-2010, 02:14 PM
#924
Memento mori
Join Date: May 2008
Location: Erie, PA
Posts: 237
Dude you always have the prettiest planes!
Since you have mucho experience with the T-34 I'm interested in your recommendations. I am ready to upgrade my T-34 for some more power and speed. I'm not interested in superfast speed, but I do want to crank it up a notch. Think of it this a way: If the stock speed is 50 mph, I want to take it to 75, not 100.
As for power I'd like to be able to have more vertical ability than stock. It doesn't have to be unlimited. I would like to be able to do both of these at around between 1/2 to 2/3 throttle so I have some reserve if I need it, so I'm not stressing the electronics and so I don't have to upgrade again when I'm ready to take the speed up again and the power to unlimited vertical.
Speaking of electronics I am using all stock being powered by Buffalo 2200mAh 30C batts. If I need to upgrade the ESC or add a BEC I can do that no problem. I would prefer to minimize the modifications with "drop in" being the best option, but I am not above doing some mods to get what I am looking for.
Lastly, I'm not looking for bargain basement quality/pricing here. I fly the snot out of the Trojan, with at least 6 batt's every day there is flying weather; which right now is 6 out of 7 days a week. So I want something that can handle this as well as the stock equipment has done.
How's that for a "I want this" list?
Whipple
Since you have mucho experience with the T-34 I'm interested in your recommendations. I am ready to upgrade my T-34 for some more power and speed. I'm not interested in superfast speed, but I do want to crank it up a notch. Think of it this a way: If the stock speed is 50 mph, I want to take it to 75, not 100.
As for power I'd like to be able to have more vertical ability than stock. It doesn't have to be unlimited. I would like to be able to do both of these at around between 1/2 to 2/3 throttle so I have some reserve if I need it, so I'm not stressing the electronics and so I don't have to upgrade again when I'm ready to take the speed up again and the power to unlimited vertical.
Speaking of electronics I am using all stock being powered by Buffalo 2200mAh 30C batts. If I need to upgrade the ESC or add a BEC I can do that no problem. I would prefer to minimize the modifications with "drop in" being the best option, but I am not above doing some mods to get what I am looking for.
Lastly, I'm not looking for bargain basement quality/pricing here. I fly the snot out of the Trojan, with at least 6 batt's every day there is flying weather; which right now is 6 out of 7 days a week. So I want something that can handle this as well as the stock equipment has done.
How's that for a "I want this" list?
Whipple
07-07-2010, 06:14 PM
#925
Member
Join Date: Jun 2010
Location: NY state
Posts: 34
What Motor/esc/prop Combo to make T28 just a bit overpowered?
Hello, I'm too Lazy to look it up
what Motor/ESC/Prop combo Can I use to make this plane
just a bit boderline Overpowered? (ie...4s Lipo etc.....)
any Links?
cheers....
what Motor/ESC/Prop combo Can I use to make this plane
just a bit boderline Overpowered? (ie...4s Lipo etc.....)
any Links?
cheers....
