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RE: Jetlegend T-45 Hawk - 10/11/2011 11:32 PM   
Kraftei


 

Posts: 22
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Joined: 2/17/2005
Last Login: 5/25/2013
From: LA, GERMANY
Status: offline 		Thank you guys.

This tallies with all infos I've read so far. I can really not imagine that he needs downtrim with flaps. I hope I'll be able to see his T-45 fly the next days...

On my sweety I'll have to change the engine mounting completely since I received my new BF-100 at the Jetpower fair.
I'll have to shorten the thrust pipe a bit and move some weight into the nose because however it's smaller and lighter than a P80 it's a bit more than my previous little Lambert.

The good news is that I'll have 120N / 26.5 lbs of thrust then - this should be enough , even on our 400ft grass strip
Of course for flying it's way too much but to have an extra punch for take off or in critical situations is never a bad choice.

It's a pefectly machined engine with amazing data: 120N @ only 125.000 rpm, weight is 2.65 lbs / 42oz / 1,21 kg; diameter : 3.9 inch.
Using of diesel fuel (any diesel, not only premium diesel like Shell vpower or sth. like that) as well as common 2 stroke engine oil is officially permitted by the manufacturer. It comes with kerostart and everything... Can't wait to let it run

Unfortunately winter is coming and finishing the heating system of my home to burn some oil actually has priority than burning kero

Holgi

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RE: Jetlegend T-45 Hawk - 10/15/2011 5:02 PM   
Xairflyer



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From: Co. Donegal, IRELAND
Status: offline 		Most aeroplanes need down trim with flaps but all Hawks need up trim

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RE: Jetlegend T-45 Hawk - 10/15/2011 5:18 PM   
fireblade5437


 

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From: Leicester, UNITED KINGDOM
Status: offline 		Apart from the CARF Hawk! none needed at all

Alan

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RE: Jetlegend T-45 Hawk - 11/19/2011 10:35 AM   
paulaus


 

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Joined: 10/25/2010
Last Login: 9/25/2012
From: Perth, AUSTRALIA
Status: offline 		Just thought I'd let you know, maidened my t-45 today with a p-100 powering.

Absolute delight to fly and didn't need anymore than 1/2 throttle for above average cruise speed.. Had two flights, both 6 minute flights, both came down with 1ltr plus of fuel left, even with the extra weight it still slipped into the landing slope like it was on rails.. Will wait til the feild is a little less busy and put it through its paces.

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RE: Jetlegend T-45 Hawk - 11/19/2011 2:18 PM   
Jesus Cordoba


 

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Last Login: 6/18/2013
From: barcelona, SPAIN
Status: offline 		Hello from Barcelona.
i have 2 question:
i glued the small pieces in front of elevators follow the lines on the fuse (parallels to airbrakes) but i see that the pieces aren´t  on line with the
elevator (0º , i think that the pieces are with a little of positive angle. (is this normal on the T-45 or i will to change the angle?
here an image.



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RE: Jetlegend T-45 Hawk - 11/21/2011 4:22 AM   
paulaus


 

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From: Perth, AUSTRALIA
Status: offline 		pictures added

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RE: Jetlegend T-45 Hawk - 4/6/2012 4:23 AM   
meps


 

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From: Fayetteville, NC, USA
Status: offline 		Finally got back on my T-45. Just wondering if you all have what I consider excessive play in the nose gear? Mine has a great deal of play between the part of the strut that goes into the sleeve that is in the trunion. It seems that this play will cause a very unstable airplane when accelerating for take-off.
Steve

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RE: Jetlegend T-45 Hawk - 4/6/2012 7:23 AM   
paulsf86


 

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From: Escondido, CA, USA
Status: offline 		meps:

Nose gear does tend to be a bit sloppy but is not an issue. Have 130 take offs and no issue with movement in nose gear system.

Paul S

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RE: Jetlegend T-45 Hawk - 4/6/2012 1:48 PM   
meps


 

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From: Fayetteville, NC, USA
Status: offline 		Thanks Paul, I really appreciate your response.
Steve

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RE: Jetlegend T-45 Hawk - 4/6/2012 10:08 PM   
paulsf86


 

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From: Escondido, CA, USA
Status: offline 		Steve:

No problem, let me know if you have any other questions.

Paul S

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RE: Jetlegend T-45 Hawk - 4/6/2012 11:02 PM   
Jesus Cordoba


 

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From: barcelona, SPAIN
Status: offline 		my first experience with the t-45....




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RE: Jetlegend T-45 Hawk - 4/6/2012 11:28 PM   
jetnuno


 

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From: Lisbon, PORTUGAL
Status: offline 		Hola Jesus,

I am sorry for this crash. Do you know waht happened? Did you put gear and flaps down?

Sorry

Regards

Nuno

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RE: Jetlegend T-45 Hawk - 4/7/2012 1:46 AM   
FILE IFR



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From: Clinton, MA, USA
Status: offline 		Sorry to see that Jesus.

It's hard to tell from the video because the camer didn't zoom in at all..... Many turns appeared to be tight and abrupt (in my opinion), my guess is it stalled from too tight of a turn.

Again Jesus, I'm sorry you lost the jet.

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RE: Jetlegend T-45 Hawk - 4/7/2012 3:33 PM   
Jesus Cordoba


 

Posts: 6
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Joined: 11/19/2011
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From: barcelona, SPAIN
Status: offline 		 this jet flyes very well. for the first fly i don´t put expo (watch  the firsts turns!!!!!), but after some turns the plane was on my hands...
the turbine installed was the first VT-80 in Spain, perfect for that plane.


i don´t know what´s  the error. the last turn (it´s not very closed), i don´t think whats the problem.
Another think are that, my secuencer door was programed :
     doors down, after 4 seconds gears down.  
may be gears down when the jet are turn, then the plane go to stall ???

the vt-80 and all the electronic are ok, only the fuse sucks...
i´ll be back whit another in the future.

thanks.





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RE: Jetlegend T-45 Hawk - 4/7/2012 9:35 PM   
RCISFUN



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From: Erie, PA, USA
Status: offline 		Can't post this warning enough, DO NOT SLOW DOWN the JL T-45 down in turns, it will snap and fall out of the sky every time
From what I can see in the Video it was way too slow at your turn.

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RE: Jetlegend T-45 Hawk - 4/8/2012 5:50 AM   
paulaus


 

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From: Perth, AUSTRALIA
Status: offline 		I didnt end up posting the flight video taken by a friend of the T-45..

shortly after this, it went in due to my own error (too slow on approach) and I'm just getting the rebuild finished at the moment!



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RE: Jetlegend T-45 Hawk - 4/8/2012 5:53 AM   
paulaus


 

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Joined: 10/25/2010
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From: Perth, AUSTRALIA
Status: offline 		after the crash...

after the repair...

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RE: Jetlegend T-45 Hawk - 4/8/2012 5:16 PM   
Craig B.


 

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From: PERTH, AUSTRALIA
Status: offline 		Noice mate! Get that sucker ready for some serious formation flying at the jet rally! I'll be sure to bring mine out too!

CB

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RE: Jetlegend T-45 Hawk - 4/10/2012 1:46 AM   
mmontella



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From: E. Falmouth, MA, USA
Status: offline 		Did anyone do anything with the springs on the main gear? I am a little concerned that they are way too soft. I will be flying off of grass and the first stage spring is almost non-existant.

Thanks,

Mark

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RE: Jetlegend T-45 Hawk - 4/10/2012 2:07 AM   
paulsf86


 

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From: Escondido, CA, USA
Status: offline 		Mark:

You could replace spring with longer stiffer spring. I streched the inner large spring to give more spring effect when all of the weight is on the gear.

Paul S

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RE: Jetlegend T-45 Hawk - 4/10/2012 8:55 PM   
olecr



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From: Trondheim, NORWAY
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quote:

ORIGINAL: mmontella

Did anyone do anything with the springs on the main gear? I am a little concerned that they are way too soft. I will be flying off of grass and the first stage spring is almost non-existant.

Thanks,

Mark


Yes it’s definitely too soft. I also flies on grass and the plane was crazy to handle in takeoff.
The way I stiffened the springs was that I took a shims on both sides of the spring and put an ordinary fuel tube inside the spring. That make the spring much stiffer.


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RE: Jetlegend T-45 Hawk - 4/16/2012 5:17 PM   
Kraftei


 

Posts: 22
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From: LA, GERMANY
Status: offline 		Hi Jesus,

unfortunately I know exactly how you feel, because looking at the last seconds of your video, I felt watching a replay of my maiden flight but with one difference: you had a couple of minutes fun with her while mine died after 10 seconds on her maiden flight, already on the first turn - destroyed in seconds

What happend :
after a very smooth take off I throttled down to about 70% of the 120N engine (the BF 100 really gave her a punch - Wow what an engine!).
My measurement to correct the thrust axis and to move the tank into the CG absolutely succeded in very impressive way!
The climbing was really flat and smooth and she felt really well behaving at the stick.
At a height of about 150 ft I brought her in a very slight big left turn with very little left aileron and little elevator.
Not wanting to risk an elevator stall if it would have been necessary to pull a bit more for a closer turn, I decided to maintain the left turn with left rudder while I wanted to "support" the left wing by giving very carefully a little right aileron. But as soon as I did this (once again: i did this very carefully and with very little travel!), still beeing in a big left turn, she immitiadely snapped (!) to the right into a spiral spin untill the impact - It happend in a second so I had no chance to recover her :-(

Neither I nor the other pilots around couldn't believe what we saw. We all agreed that this was a typical tip-stall but none had an idea why it happend!
Speed was absolutely OK and CG was about 140mm totally empty (tank was exactly IN the CG, with filled hopper CG was apprx. 138mm)
With the flaps full down (which have not been activated on take off) I also mixed 2mm aileron up. The installation was very neat (so obviously no technical problems) so what did I wrong ???

Obviously either she's a real beast or I wasn't skilled enough for her (or probably both)

Anyway, very sad! She was a real beauty!


kind regards

Holger

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RE: Jetlegend T-45 Hawk - 4/17/2012 3:37 AM   
causeitflies



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From: Steubenville, OH, USA
Status: offline 		Holger,
Was a beautiful plane, sorry for the loss.
I think the cross controlling is what did you in. It needs to fly through the turns, not skid.

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RE: Jetlegend T-45 Hawk - 4/17/2012 6:04 AM   
Ron101



Posts: 1686
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Last Login: 6/18/2013
From: Brentwood, CA, USA
Status: offline 		I have one of these in E power... mine seems to fly well. I only have 3 flights due to power system problems.
My old setup was 23.5 pounds, had tons of power on 14s ...... but I had two ESC issues and a fire

I swapped out to a much lighter 12s setup and I'm now 21.5 pounds loaded and ready to fly... I moved the CG to 135mm and reduced the flaps to I think about 15 mm
I had a huge amount a flap at first (all I could get) and it did some strange things, I think it was blanking out the elevator

so I'm really excited to get it back out with the new setup, I know when this plane is dialed it flies really sweet... I watch Pablo flies his for many flight at California jets a few years ago and knew I had to have one. I went with full gear doors and a cockpit. I think it I ever do a new one I'll strip it down to bare bones like Pablo

his is 20 pounds loaded and flies killer..... so maybe it's just a wing loading issue

look how well his flies



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RE: Jetlegend T-45 Hawk - 4/17/2012 11:11 AM   
EDFCrazy


 

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From: Cumbria, UNITED KINGDOM
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quote:

ORIGINAL: Kraftei

My measurement to correct the thrust axis and to move the tank into the CG absolutely succeded in very impressive way!

Speed was absolutely OK and CG was about 140mm totally empty (tank was exactly IN the CG, with filled hopper CG was apprx. 138mm)

Holger


I noticed in this picture Holger that your nose strut seems to be bent back very far. i wonder what had happened and if this had pushed up against any batteries that might have been in the nose area.

I see you moved your tank closer to your cg, now with other people that have not done this, i wonder if you were then tail heavy with your tanks full? Reason i say this is because people measure there cg before they fill there tanks but then add fuel before they fly, with other people tanks more forward then yours, that would make there planes slightly more nose heavy and with your tanks not forward of the cg your did have this extra nose weight.

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