RE: PHOENIX MODELS F-20 TIGERSHARK ?  
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RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/15/2008 2:57:39 AM   
BIuehawk


 

Posts: 20
Joined: 11/19/2007
From: Riverside, CA, USA
Status: offline 		What .60-size model?? There's a bigger model out now????????

< Message edited by BIuehawk -- 5/15/2008 2:58:34 AM >

(in reply to vicman)
       Post #: 551

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/15/2008 3:21:04 AM   
vicman



Posts: 6183
Joined: 12/8/2002
From: Valdese, NC, USA
Status: offline 		Not now...Cermark has had them out for some time. I don't know if they are still available anywhere or not.


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RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/16/2008 7:30:56 AM   
BIuehawk


 

Posts: 20
Joined: 11/19/2007
From: Riverside, CA, USA
Status: offline 		Ahhh...ok...you must mean the one by Kangke in New York that had one for .40-.52-sized engines. Their web site states they are out of stock. I have a pic of it ...let me see if I can upload it!



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(in reply to vicman)
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RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/16/2008 2:58:51 PM   
vicman



Posts: 6183
Joined: 12/8/2002
From: Valdese, NC, USA
Status: offline 		They had a bigger one too. It came with retracts. Flyboydave has one.


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Bigger Badder Meaner Faster!
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RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/19/2008 4:04:52 PM   
PlaneHeli


 

Posts: 607
Joined: 2/1/2006
From: Australia & Asia &, NEW ZEALAND
Status: offline 		Gidday,

Im looking at getting the Phoenix F20.

Reading this thread it appears there is at least 2 versions. The newer version with the servos mounted internally.
Are there different versions with the servos inside.

Is the latest version a good build quality including the supplied control horns, engine mount, hinges, control rods, etc.

Is it still recommended to strenghten the nose gear area, main gear, bulkhead etc on the new version.

Would I notice a difference using digital servos on the ailerons and elevator as apposed to standard analog servos.

Cheers

< Message edited by PlaneHeli -- 5/19/2008 7:56:35 PM >

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Useless Things...Runway behind you, Sky above you, Air in your Tanks, Engine Oil in the Hanger.

(in reply to vicman)
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RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/20/2008 12:44:29 AM   
BIuehawk


 

Posts: 20
Joined: 11/19/2007
From: Riverside, CA, USA
Status: offline 		I have the newest version with internal servos and it appears to be built quite solidly! The control horns are of a newer type and appear stronger than the originals. Haven't flown mine yet so others with flight time on the newer version will have to jump in and answer the rest of your questions.

(in reply to PlaneHeli)
       Post #: 556

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/22/2008 11:51:14 AM   
dorset john



Posts: 45
Joined: 10/15/2002
From: Wimborne Dorset, UNITED KINGDOM
Status: offline 		I have some issues with my Phoenix Tigershark build quality:
First, when I tightened up the wing hold-down screws for the first time, the wing hold-down plate simply pulled its way through the soft balsa side wall that were meant to hold it in place. I reinforced this with hard balsa longerons and epoxied the plate to the side walls.
Next, when I put Z-bends in the supplied push-rods with my Z-bend pliers I heard a quiet 'click' - on inspection I found that all the push-rods had fractured at the point of the bends and had zero strength (the metal is too hard I think).
Also, I'm a bit suspicious of the fin attachment at the rear being simply glued flat to the fus', this just has to fail on the first attempt at knife-edge - I fixed this with a carbon dowl through the fin and into the fus'.
Has anyone else got any issues/warnings?

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       Post #: 557

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/22/2008 12:26:33 PM   
PlaneHeli


 

Posts: 607
Joined: 2/1/2006
From: Australia & Asia &, NEW ZEALAND
Status: offline 		Thanks dorset john

Only bought the model yesterday so havnt had a close look at the manual yet.

The forward bulkhead joints to the fuse look a little weak to me, will reinforce.

May replace the linkages too.

I thought the wing mount looked a little light too. It appears it is just butted up to the fuse and glued with insufficient braces so will reinforce them too.

Whats your opinion on the supplied plastic elevator / aileron horns, strong enough for this plane.

I havnt looked closely at the fin. It should be glued into a groove in the top fuse not just glued sitting on top. Could you elaborate on how your reinforced the fin with the carbon dowl.

Is the wing strong where the undercarriage fits. I fly off a rough field and the undercarriage gets a pounding. I had to greatly reinforce this area on my phoenix atlantis after it gave way (they wernt hard landings HONEST!!). the wood on the atlantis was too small and only a small area contact where glued at the ends.

Cheers

_____________________________

Useless Things...Runway behind you, Sky above you, Air in your Tanks, Engine Oil in the Hanger.

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       Post #: 558

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/22/2008 9:55:12 PM   
dorset john



Posts: 45
Joined: 10/15/2002
From: Wimborne Dorset, UNITED KINGDOM
Status: offline 		I didn't trust the undercarriadge block mountings (I held the wing up to the sun and it looked like it was attached at the wheel end by simple insertion into a wing former). So I simply opened up the servo wire exit holes and inserted a couple of hardwood blocks which I epoxied either side of the wing centre former, I then installed a carbon undercarriage just in front to the wing/fus box which covers the wing plate.
The fin I fixed by drilling up just in front of the fin upright (the bit the hinges are in) and inserting a thin carbon rod which then went into a mating hole which I drilled in the fus.
I also did not trust using plastic horns (of any type) for the rudder and elevator, simply because of the compound angles from the servos to the horns which will add a twisting motion. I replaced these with aluminium post type horns which can take a twist. I also needed to do a bit of filing to get a near straight run for the rudder pushrod.
I have a Webra speed .55 installed but the whole plane seems to be a bit heavy and dirty for any real speed, I also suspect I will need to visit a church roof to get enough lead to shove up its a**e end to balance out the long nose.
But it's a very pretty plane and I think I've got the only one in the UK.

(in reply to PlaneHeli)
       Post #: 559

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/27/2008 10:16:22 PM   
dorset john



Posts: 45
Joined: 10/15/2002
From: Wimborne Dorset, UNITED KINGDOM
Status: offline 		OK - I've seen the light - this is an amazing model to fly. It needed no additional weight to balance (although I did notice the slab of lead the manufacturer installed in the tail). It needed no trimming apart from a couple of clicks of up elevator.
But most amazing of all, this plane has almost completely neutral balance - it flys inverted with just a breath of down elevator, It knife-edges with practicaly no roll or pitch and slow-rolls quite cleanly. And after all that it's a doddle to land, strangely the tail sinks as you slow down and it lands on the main wheels at a really slow speed.
The only scary thing is it sticks to the ground on take-off, and when it finally lifts it goes up like a surface-to-air-missile - so be cautious with the elevator feed.
Finally, the Webra .55 really sings, with each flight the power increased a little bit and I really started having fun.

(in reply to dorset john)
       Post #: 560

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/28/2008 3:15:45 AM   
PlaneHeli


 

Posts: 607
Joined: 2/1/2006
From: Australia & Asia &, NEW ZEALAND
Status: offline 		dorset john

Interesting, It has lead in the tail already?

Glad to hear such a good review of how it flys. I havnt started building yet.

Did you mount the battery and Rx in the rear servo compartment.

Could you move the battery & Rx rear of the servo compartment and remove the lead weight? (would require some modification)

Cheers

_____________________________

Useless Things...Runway behind you, Sky above you, Air in your Tanks, Engine Oil in the Hanger.

(in reply to dorset john)
       Post #: 561

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/28/2008 9:01:38 AM   
dorset john



Posts: 45
Joined: 10/15/2002
From: Wimborne Dorset, UNITED KINGDOM
Status: offline 		I mounted the Rx under the wing - for two reasons, first its easier access for changing the Xtal and second because I then only needed to add extension leads to the ailerons (all the rest of the servo and switch leads reached the Rx direct).
You could definitely remove the lead in the tail and replace it with a flat battery pack, there's pleanty of room, but you will need to provide an access hatch either at the rear end (probably easiest) or under the tail. Although experience says that if you permanently fit a new battery pack, it may well outlast the plane, I just can't resist flying low and fast with this type of model.
Good luck with your build.

(in reply to PlaneHeli)
       Post #: 562

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/28/2008 12:17:54 PM   
PlaneHeli


 

Posts: 607
Joined: 2/1/2006
From: Australia & Asia &, NEW ZEALAND
Status: offline 		dorset john,

Thanks.

It sounds like youve got the C of G spot on with the Webra 55. Where does the C of G (how many mm) lie with the tank empty. Is it spot on with the manual or forward with the bigger engine.

It also sounds as if its behaving like a real jet with the high nose attitude on approach at the lower speed.
Great stuff.

PS Your wife will be very thankfull it was a copy of a twin jet. With the two bottles of mouthwash needed.

Cheers

< Message edited by PlaneHeli -- 5/28/2008 12:33:37 PM >

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Useless Things...Runway behind you, Sky above you, Air in your Tanks, Engine Oil in the Hanger.

(in reply to dorset john)
       Post #: 563

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/30/2008 10:57:39 PM   
dorset john



Posts: 45
Joined: 10/15/2002
From: Wimborne Dorset, UNITED KINGDOM
Status: offline 		CofG is sitting spot-on at 150mm with an empty tank and the Webra (which incidently is a very light motor). I measured the CofG from the under-side of the wing rather than the top-side as stated in the manual. Oh, and thanks for reminding me about the wife (I knew I'd forgotten something). By the way all the servos I used are cheapo Futaba 148 or 3001's, but I might move up to a 3010 for the rudder if it looks like the plane can do a knife-edge loop (will experiment tomorrow). A tip for the aileron cover plates is to fill in the servo horn cut-out with thin balsa sheet and then cut a thinner slot for the horn - you will need to use the outer hole of a 4-hole servo horn and the outermost hole of the supplied aeleron horn.
Good luck with yours...

(in reply to PlaneHeli)
       Post #: 564

RE: PHOENIX MODELS F-20 TIGERSHARK ? - 5/31/2008 12:03:18 PM   
BIuehawk


 

Posts: 20
Joi