Gryphon evo
08-13-2014, 04:16 AM
#26
I'm loving mine! Up to about 25 flights now I think and it's flying like a dream. You can really get it slow on landing as well. No bad habits to report on. I'm going to try it without the wingtips next flight for something different.
08-13-2014, 04:39 AM
#27
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Dear Jeremy,
"CG was 195cm from the leading edge of the wing root, Elevators were 20mm up/down, ailerons 20mm up/down, Rudder 25mm left/right and flaps were 20 deg takeoff and 50 deg landing but I am thinking of adding more flap next flights so I will let you know what I end up with"
Can you please update your settings info if there are any change of course?
Thanks in advance,
Ozgur
"CG was 195cm from the leading edge of the wing root, Elevators were 20mm up/down, ailerons 20mm up/down, Rudder 25mm left/right and flaps were 20 deg takeoff and 50 deg landing but I am thinking of adding more flap next flights so I will let you know what I end up with"
Can you please update your settings info if there are any change of course?
Thanks in advance,
Ozgur
08-13-2014, 06:06 PM
#29
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Glad to see this thread is getting some recent posts. I ordered one from Maurizio and am hoping to receive it this Friday. I plan to put a Jetcat P80SE in it and a Cortex Demon gyro. I suspect once I get it to the model airfield here more orders will be coming Redwings way, we'll see....
Steve
Steve
08-13-2014, 06:51 PM
#30
Hi Steve,
You won't need a gyro on this jet, it is very stable. You sometimes get a little wing wiggle with the winglets on when flying in a cross wind but otherwise it is rock solid. I'm looking forward to trying it without them to see the difference.
Here is a short video of mine, not the greatest quality but it shows the take off and landing.
https://www.youtube.com/watch?v=R5yfDKdhZus
I've also got quite a few photos of my build on my FB page if you need them
https://www.facebook.com/aussiejets Go into Photos -> Albums -> Gryphon Evo Build
If you have any questions flick me a message and I'll help out as much as I can.
Cheers
Jeremy
You won't need a gyro on this jet, it is very stable. You sometimes get a little wing wiggle with the winglets on when flying in a cross wind but otherwise it is rock solid. I'm looking forward to trying it without them to see the difference.
Here is a short video of mine, not the greatest quality but it shows the take off and landing.
https://www.youtube.com/watch?v=R5yfDKdhZus
I've also got quite a few photos of my build on my FB page if you need them
https://www.facebook.com/aussiejets Go into Photos -> Albums -> Gryphon Evo Build
If you have any questions flick me a message and I'll help out as much as I can.
Cheers
Jeremy
08-14-2014, 02:18 AM
#31
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Dear Jeremy,
This gryphon evo is my first turbine jet. I don't know anything about turbine flying, fuel system even how to run it. There are a couple of guys who has turbine building and flying experience and I will ask help from them and we'll see what will be their answer. Anyway, in one of your building photo shows that you made the installation of tail pipe not to the leading edge of aft fuselage instead you screw it to the front fuselage half. Is the reason because of the CG or for some other reasons? I fixed mine to the aft fuse half.
My second question is, I am planning to install Jetcat P100 but the mounting plywood plates are not enough to fix the turbine with stock mounting clamp, again in your photo I realized an extension plate which is fixed with only screws or screws+hysol??
And last question, did you craved some inlet ducting to fix the electric starter of turbine?
Regards,
Ozgur
This gryphon evo is my first turbine jet. I don't know anything about turbine flying, fuel system even how to run it. There are a couple of guys who has turbine building and flying experience and I will ask help from them and we'll see what will be their answer. Anyway, in one of your building photo shows that you made the installation of tail pipe not to the leading edge of aft fuselage instead you screw it to the front fuselage half. Is the reason because of the CG or for some other reasons? I fixed mine to the aft fuse half.
My second question is, I am planning to install Jetcat P100 but the mounting plywood plates are not enough to fix the turbine with stock mounting clamp, again in your photo I realized an extension plate which is fixed with only screws or screws+hysol??
And last question, did you craved some inlet ducting to fix the electric starter of turbine?
Regards,
Ozgur
Last edited by Ethem Ozgur; 08-14-2014 at 02:26 AM.
08-14-2014, 03:48 AM
#32
Hi Ozgur,
Tail Pipe: I actually extended my tail pipe length so I could move my engine as far forward as I could to eliminate extra weight needed in the nose to balance the model. I still ended up with 700grams of weight right up the front in the nose. If I was building this again I would try and fit heavier batteries up in the nose but I used what I had available at the time and even with the nose weight my plane still came out very light at 9.9kgs dry. If you can try and put some heavy flight packs up in the nose to achieve the C.G. I made my lead weight by pouring some melted lead into an egg poacher that I borrowed from the wife and then used a hammer to help shape it to fit better into the front of the nose.
Turbine Mounting Plates: These were initially screwed in while I got my measurements and turbine alignment done. Once everything was mounted I took out the turbine and then hysoled the plywood mounts onto the existing mounts and used the screws to clamp it together.
I had to remove some of the inlet ducting to accommodate the FOD. I am using the M100XBL so the starter motor is not to long.
I hope this helps
Regards
Jeremy
Tail Pipe: I actually extended my tail pipe length so I could move my engine as far forward as I could to eliminate extra weight needed in the nose to balance the model. I still ended up with 700grams of weight right up the front in the nose. If I was building this again I would try and fit heavier batteries up in the nose but I used what I had available at the time and even with the nose weight my plane still came out very light at 9.9kgs dry. If you can try and put some heavy flight packs up in the nose to achieve the C.G. I made my lead weight by pouring some melted lead into an egg poacher that I borrowed from the wife and then used a hammer to help shape it to fit better into the front of the nose.
Turbine Mounting Plates: These were initially screwed in while I got my measurements and turbine alignment done. Once everything was mounted I took out the turbine and then hysoled the plywood mounts onto the existing mounts and used the screws to clamp it together.
I had to remove some of the inlet ducting to accommodate the FOD. I am using the M100XBL so the starter motor is not to long.
I hope this helps
Regards
Jeremy
Dear Jeremy,
This gryphon evo is my first turbine jet. I don't know anything about turbine flying, fuel system even how to run it. There are a couple of guys who has turbine building and flying experience and I will ask help from them and we'll see what will be their answer. Anyway, in one of your building photo shows that you made the installation of tail pipe not to the leading edge of aft fuselage instead you screw it to the front fuselage half. Is the reason because of the CG or for some other reasons? I fixed mine to the aft fuse half.
My second question is, I am planning to install Jetcat P100 but the mounting plywood plates are not enough to fix the turbine with stock mounting clamp, again in your photo I realized an extension plate which is fixed with only screws or screws+hysol??
And last question, did you craved some inlet ducting to fix the electric starter of turbine?
Regards,
Ozgur
This gryphon evo is my first turbine jet. I don't know anything about turbine flying, fuel system even how to run it. There are a couple of guys who has turbine building and flying experience and I will ask help from them and we'll see what will be their answer. Anyway, in one of your building photo shows that you made the installation of tail pipe not to the leading edge of aft fuselage instead you screw it to the front fuselage half. Is the reason because of the CG or for some other reasons? I fixed mine to the aft fuse half.
My second question is, I am planning to install Jetcat P100 but the mounting plywood plates are not enough to fix the turbine with stock mounting clamp, again in your photo I realized an extension plate which is fixed with only screws or screws+hysol??
And last question, did you craved some inlet ducting to fix the electric starter of turbine?
Regards,
Ozgur
08-14-2014, 03:56 AM
#33
I also added carbon strips to the top of the canopy. This probably not necessary but for the time it took and the size of the hatch I felt it was worthwhile. I also removed the hatch latch and added a bolt instead. Again I just felt it was more secure and didn't take long to modify.
(Sorry I'm not sure why my photos are loading upside down...)
(Sorry I'm not sure why my photos are loading upside down...)
08-14-2014, 04:48 AM
#34
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Been flying mine for quite a while now.
its the early version without the winglets. Flys very well.
only had it do one nasty. But it was more a fault of mine. Was doing a reversal at full throttle and as I pulled it over the top it flicked. My fault for pushing it way too hard!
Regards
Nigel
its the early version without the winglets. Flys very well.
only had it do one nasty. But it was more a fault of mine. Was doing a reversal at full throttle and as I pulled it over the top it flicked. My fault for pushing it way too hard!
Regards
Nigel
Last edited by snatch-it; 08-14-2014 at 04:53 AM.
09-06-2014, 11:43 PM
#37
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Hello Pavcon,
I cant say anything cos still I couldn't be able to finish my built! (Not at home and working like a crazy)
As Jeremy advised, I will design the nose battery tray to accommodate 2x 1500 Rx batteries + stock jetcat turbine battery + electron's battery and we will see it still needs extra lead weight or not.
Ozgur
I cant say anything cos still I couldn't be able to finish my built! (Not at home and working like a crazy)
As Jeremy advised, I will design the nose battery tray to accommodate 2x 1500 Rx batteries + stock jetcat turbine battery + electron's battery and we will see it still needs extra lead weight or not.
Ozgur
Last edited by Ethem Ozgur; 09-07-2014 at 12:04 AM.
09-06-2014, 11:52 PM
#38
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I'm tired with this situation,
Actually I sold the Gryphon to a customer. There was no manual no nothing.. I had a lot of trouble with it and I get to hear all the yelling from the customer.
MAurizio should really come up with a clear Manual. It's not my fault to hear all the yelling from a customer who has given his hard earned money for it.
Maurizio told me that the CG should be from the spar up to 1cm infront of the spar. Where are the 195cm from wing root really end up?
Just had a conversation with the buyer and he was really frustrated. It was supposed to be an easy built but ended up with a lot of trouble and question marks to deal with.
Actually I sold the Gryphon to a customer. There was no manual no nothing.. I had a lot of trouble with it and I get to hear all the yelling from the customer.
MAurizio should really come up with a clear Manual. It's not my fault to hear all the yelling from a customer who has given his hard earned money for it.
Maurizio told me that the CG should be from the spar up to 1cm infront of the spar. Where are the 195cm from wing root really end up?
Just had a conversation with the buyer and he was really frustrated. It was supposed to be an easy built but ended up with a lot of trouble and question marks to deal with.
09-07-2014, 12:20 AM
#39
Have a look at my photos on my FB page. They show my build step by step and should help you
It's one of the easiest builds I've done in ages. There was also heaps of building pics from the first Evo on RCU which I referred to.
I have my cg at 190mm (19cm) back for me leading edge of the wing at the root which is about 1cm in front of the leading edge of the spar.
hope this helps, tell, your customer to persist, it is an awesome plane to fly.
cheers
Jeremy
It's one of the easiest builds I've done in ages. There was also heaps of building pics from the first Evo on RCU which I referred to.
I have my cg at 190mm (19cm) back for me leading edge of the wing at the root which is about 1cm in front of the leading edge of the spar.
hope this helps, tell, your customer to persist, it is an awesome plane to fly.
cheers
Jeremy
09-07-2014, 01:42 AM
#41
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Have a look at my photos on my FB page. They show my build step by step and should help you
It's one of the easiest builds I've done in ages. There was also heaps of building pics from the first Evo on RCU which I referred to.
I have my cg at 190mm (19cm) back for me leading edge of the wing at the root which is about 1cm in front of the leading edge of the spar.
hope this helps, tell, your customer to persist, it is an awesome plane to fly.
cheers
Jeremy
It's one of the easiest builds I've done in ages. There was also heaps of building pics from the first Evo on RCU which I referred to.
I have my cg at 190mm (19cm) back for me leading edge of the wing at the root which is about 1cm in front of the leading edge of the spar.
hope this helps, tell, your customer to persist, it is an awesome plane to fly.
cheers
Jeremy
Truth is I'm not the most experienced builder my self but Ive seen much worse planes to built.
so some are flying at 195cm and some at 190cm which is 1cm infront of the leading edge of the spar. that means the CG range is just fine.. . only downside he will need 1kgs of dead lead weight to the front. actually it is my believe that no matter what it takes to build a plane if it flies well all is forgotten.
hope he proceeds to fly it. he was a good friend and I'm not willing to argue anymore.
I even interrupted my holiday a day earlier for some matters.
Jeremy thanks for the help. I just liked your page. you can add me on facebook too.
https://www.facebook.com/pavlos.constantinou1
and
https://www.facebook.com/jtmcyprus
thanks for the help JEremy. I think he just needs the will and confidence to just go fly it.
BUT again Maurizio should come up with a manual. Even lego toys have manuals
If it had a detailed manual my answer to every question woul have been....
"refer to the manual please"
09-07-2014, 02:15 AM
#42
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Got 2x2600 rx lipos. 1x300 lipo for the retracts and the 2100 life pack for the p100rx in the nose of mine.
its balancing at 195mm.
Bearing in mind its the older gryphon without the winglets and other fins fitted.
Regards
Nigel
its balancing at 195mm.
Bearing in mind its the older gryphon without the winglets and other fins fitted.
Regards
Nigel
09-07-2014, 10:03 PM
#43
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Gryphon fly well without winglets also..
09-08-2014, 02:53 AM
#44
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Dear Nigel,
That is exactly what I wanted to do. Putting all batteries in front, can you please send me some photos of your front battery tray, that must be a difficult challenge to fit all the batteries there?
Thanks in advance.
Ozgur
That is exactly what I wanted to do. Putting all batteries in front, can you please send me some photos of your front battery tray, that must be a difficult challenge to fit all the batteries there?
Thanks in advance.
Ozgur
09-08-2014, 08:57 AM
#45
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I will do as soon as im home off my holidays.
basically its a thin stick with the turbine life pack underneath right on the end and the 2 rx lipos slightly further back on the sides.
That fits in the nose and then the retracts lipo slides in on to. If that makes sense!!
basically its a thin stick with the turbine life pack underneath right on the end and the 2 rx lipos slightly further back on the sides.
That fits in the nose and then the retracts lipo slides in on to. If that makes sense!!
10-14-2018, 10:03 PM
#46
The year is now 2018 , October...... got to maiden my used but new to me Gryphon several weeks ago and required 2 clicks of aileron to level the wings and a couple of clicks on elevator and that was it. Decided on the JETS Munt 100XBL and this baby moves. The decision on the 100 was because of the lowest weight by a fair bit of its class. Have the JM VT80 in another jet and am impressed with ,so why change. Another factor is the two JM and my Wren 44 turboprop all use the same fuel so no mixing of different fuels.
The paint scheme is the US Navy version with Pro-link electric retracts and E brakes. Used the suggested throws with 35% expo and 20 and 60 degrees in the flaps. Does pitch up slightly at full flap so mixed in about 5% elevator compensation. Radio system is by Jeti DS16 and power distribution by Powerbox Evolution using A123 Systems Life batteries mounted in the nose. Added about 230 grams in the nose and balances at the 195 mm mark. Could have probably got by with 200 grams. If I remember correctly the empty , UAT full , came in at about 9.6 kgm. I did add a piggy back 20 oz tank to give me a total of 105 oz of fuel but looks like I may be ok with the OEM tank of 84 oz. Winter is just arround the corner so further flying will have to wait till next spring.
Very happy with the flights I did get in.
The paint scheme is the US Navy version with Pro-link electric retracts and E brakes. Used the suggested throws with 35% expo and 20 and 60 degrees in the flaps. Does pitch up slightly at full flap so mixed in about 5% elevator compensation. Radio system is by Jeti DS16 and power distribution by Powerbox Evolution using A123 Systems Life batteries mounted in the nose. Added about 230 grams in the nose and balances at the 195 mm mark. Could have probably got by with 200 grams. If I remember correctly the empty , UAT full , came in at about 9.6 kgm. I did add a piggy back 20 oz tank to give me a total of 105 oz of fuel but looks like I may be ok with the OEM tank of 84 oz. Winter is just arround the corner so further flying will have to wait till next spring.
Very happy with the flights I did get in.
Last edited by stegl; 10-14-2018 at 10:06 PM.
