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Old Apr 03, 2012, 12:43 AM
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Originally Posted by Sammy70 View Post
Kind of quiet in this thread...

Is that because everyone is out enjoying their TurboJet?


Wondering how many of you are running 4s with the stock escs and how they are holding up?
mike's trubo jet fan need some balance holding up good with 4s battery
Mike flying new DYNAM Turbo jet (6 min 19 sec)

sound of nice balanced edf with 3s battery
EDF run up (2 min 29 sec)

i fly my with 2600mah 4s all the time with stock esc & fan no issue at all
Dynam turbo jet (4 min 21 sec)


like my video here is link to my channel ---- www.youtube.com/user/9westwood9
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Old Apr 03, 2012, 07:14 AM
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PSALM 14:1
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Cool, thanks for the info Westwood...
Old Apr 04, 2012, 06:07 PM
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If that guy in the first video would just learn how to slow that baby down, he would be fine. That jet in the third video sounds sweet.
Old Apr 07, 2012, 12:03 AM
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Don't Move I've Dropped My Nut
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Got it!


Ordered on Apr 1 and received Cessna 500 today...No damage, no missing parts..and the retracts work! The EDF's/ESC's even function. Both need a bit of balancing, though. A lot of plane for $118 bucks.
Old Apr 07, 2012, 12:20 AM
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You won't regret buying it. It's a fun easy flying plane.
Old Apr 07, 2012, 12:46 AM
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The secret's out!
Old Apr 07, 2012, 08:13 AM
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I've just completed assembly of my second Turbojet. My first one was the fixed gear version and balanced nicely. It occurred to me while looking at this retract version that it could be nose heavy because of the added 30g nose wheel retract.

Sure enough, it's way nose heavy without adding about 3/4 oz to the tail. Other option would be to modify the battery compartment to move the battery further back into the fuse.

Retracts were added without making provisions for this - the rest of the plane is identical to the fixed gear version. They didn't even update the manual which still has pictures and assembly instructions for the fixed gear.

I'm a little disappointed in this. The fans could have been moved back just a little in the nacelles to rebalance the plane.

Anyone else noticed this? How did you get the CG back to 55-60mm?
Old Apr 07, 2012, 08:49 AM
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Originally Posted by dbc View Post
Sure enough, it's way nose heavy without adding about 3/4 oz to the tail. Other option would be to modify the battery compartment to move the battery further back into the fuse.

What battery were you using?
Old Apr 07, 2012, 11:47 AM
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3s 2200mah 30c turnigy. 190g. Same one that balanced fine in fixed gear plane. Looks like any 4s would require lots more tail weight.
Old Apr 07, 2012, 11:53 AM
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I'll probably maiden it with about 1/2 oz tail weight, still slightly nose heavy.

My previous experience with this plane was that it tends to land a little fast w/o flaps. Forward CG is probably going to make this even more pronounced.
Old Apr 07, 2012, 11:56 AM
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Takeoff=Option Landing=Must
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Quote:
Originally Posted by dbc View Post
I've just completed assembly of my second Turbojet. My first one was the fixed gear version and balanced nicely. It occurred to me while looking at this retract version that it could be nose heavy because of the added 30g nose wheel retract.

Sure enough, it's way nose heavy without adding about 3/4 oz to the tail. Other option would be to modify the battery compartment to move the battery further back into the fuse.

Retracts were added without making provisions for this - the rest of the plane is identical to the fixed gear version. They didn't even update the manual which still has pictures and assembly instructions for the fixed gear.

I'm a little disappointed in this. The fans could have been moved back just a little in the nacelles to rebalance the plane.

Anyone else noticed this? How did you get the CG back to 55-60mm?
I am flying mine on 2x3s. I modified harness to accept 2 packs. Put paper towel cardboard core as a new battery compartment. Front pack is just about even with canopy opening.
I am also getting 8 min flying time.

Rob
Old Apr 07, 2012, 02:44 PM
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Yeah, I'm going to have to get that battery further back in the fuse. Im ok with the shorter flight times of a single pack. With the slightly fragile retracts, I prefer to keep this plane as light as possible. Looks like one 2200 would need to be moved back a little over an inch. I'll probably remove the rear ledge and make a light ply extension for the compartment.

I just wish Dynam would have done a more careful job when they added the retracts. Still a sweet little plane. I really missed my first one and I'm sure I'll enjoy this one, too.
Old Apr 07, 2012, 08:07 PM
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Quote:
Originally Posted by Westwood View Post
mike's trubo jet fan need some balance holding up good with 4s battery
http://www.youtube.com/watch?v=uLNJKWTQSdo
sound of nice balanced edf with 3s battery
http://www.youtube.com/watch?v=GP-V8dE-v2s
i fly my with 2600mah 4s all the time with stock esc & fan no issue at all
http://www.youtube.com/watch?v=R7-_KL8LqHU

like my video here is link to my channel ---- www.youtube.com/user/9westwood9
How much C rating on 4S 2600?? I've probably 150 landings on my Turbojet and am all but bored with the 3S 25C power. I just tried a 4S 5000M, 45-90C on the bench (no chance it'd lift a 5000 pack), but am curious how much C rating the ESCs can handle.
Old Apr 08, 2012, 12:05 PM
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How much C rating on 4S 2600?? I've probably 150 landings on my Turbojet and am all but bored with the 3S 25C power. I just tried a 4S 5000M, 45-90C on the bench (no chance it'd lift a 5000 pack), but am curious how much C rating the ESCs can handle.
that was 4s 2600mah 25c battery from my fms T-28,

as far as cg go, if you move back 3/4 inch you be fine
Old Apr 09, 2012, 12:02 AM
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Originally Posted by Westwood View Post
that was 4s 2600mah 25c battery from my fms T-28,

as far as cg go, if you move back 3/4 inch you be fine
Thanks Westwood, and I assume no burnout on stock ESCs? (I have not set up a separate UBEC on this plane as cost just isn't worth it to me.)


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