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Preditor Modifications? - 3/2/2002 10:17:01 PM   
shmo46


 

Posts: 418
Joined: 1/26/2002
From: Tucson
Status: offline 		Just got started in B open combat last week. What a blast! I lost my wooden plane in the first round, but i am hooked.

Decided to get a couple EPP Preditors for the next meet. Cool little kit. Looks like a wild flyer.

The questions i have are:

Would a longer fin, or wing tip do das make it easyer or better?
Lightening holes or not?
Ultra cote or Econocote?
4 Oz tank or 6?
Hitech 85MG or 225MG?
Goop or ?
Thicker plastic for home plate needed?
Magnum 28 or MVVS 26 combat? or?

opinions?

Shmo

< Message edited by shmo46 -- Mar 3 2002 6:03AM >
       Post #: 1

Preditor and Endro - 3/4/2002 9:16:34 AM   
Slocum



Posts: 255
Joined: 1/24/2002
From: Mt. Vernon, IN, USA
Status: offline 		I have both a Preditor and an Endro. In the instructions they say to use only Ultracoat and I have been happy on both birds. They are the only planes I have flown into the ground at full throtle and had up in the air minutes later! I built both acording to plan.


Check out crash pictures Here: [URL=http://www.poseyflyers.com/sale/sale.htm]Crash Pictures[/URL]


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       Post #: 2

Preditor Modifications? - 3/6/2002 11:57:14 AM   
GalenB



Posts: 2012
Joined: 12/5/2001
From: Issaquah, WA, USA
Status: offline 		I just finished my Predator and flew it this past week end. I have an O.S. .25FX on mine and it flies great! It's very fast and do not exceed the recommended 3/16" elevator throw. I had mine set at 5/16" and it would snap out of a loop. My only suggestions are to pre-stage the components to set the CG before gluing everything in. Even after putting the Rx and tha battery just behind the front brace my engine ended up at the very end of the mounting beams...

I built mine pretty much per the instructions. I did cut out the squares of foam shown in the instructions to increase roll rate, and I used the bi-directional tape all the way across the top of the wing instead of stopping at 2/3rds span. Mine is very stiff and with 1/2" of elevator thow the roll rate is very fast.

I can hand launch mine myself as it pretty much flies out of your hand when you release it.

Cheers!

Galen

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       Post #: 3

Preditor Modifications? - 3/6/2002 4:09:28 PM   
shmo46


 

Posts: 418
Joined: 1/26/2002
From: Tucson
Status: offline 		Nice web site Rslocum!

Full throtle into the ground and not smashed all to heck? definately the plane for me!

Looks like you guys are big Morris fans. Have seen the Balsanova, but none of the others. Just ordered the Top cap. Hopefully it will not end up in a website crash page! Tempted to try the MVVS49 with it. Any good?

Galen,
Thanks for the heads up on ballance and control limits.

Just started the first preditor today. Should be able to try it this weekend!

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       Post #: 4

Preditor Modifications? - 3/6/2002 11:08:19 PM   
GalenB



Posts: 2012
Joined: 12/5/2001
From: Issaquah, WA, USA
Status: offline 		To answer the original questions:

I used HS-225MG servos. The guys at TufFlight convinced me they we necessary...

I used an Expert SL-300 for the throttle since I had it lying around. I did build the throttle pushrod out of two rods connected via a fuel tubing sleeve...

I used both Shoe Goo and Goop.

I also used UltraCote and would recommend that you do too.

I went to the trouble to find the 3M bi-directional strapping tape. It can be ordered online or bought at your local Staples if you have one.

As stated I did the lightening holes, but do not think I would recommend it. It was a time consuming PIA... I like the roll rate, but am unsure about my crashworthiness now...

I used a 6 oz. Hayes fuel tank. I think a 4 oz. might be sufficient for actual combat as I get 20+ minute flights at half throttle now. I have not flown mine in combat and do not know how much full throttle yanking and banking are involved, but I can guess there will be a lot. How long does an average battle last?

I made no changes to the fin or the home plate.

Cheers!

Galen

< Message edited by GalenB -- Mar 10 2002 6:05AM >

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       Post #: 5

Preditor Modifications? - 3/7/2002 3:22:43 AM   
shmo46


 

Posts: 418
Joined: 1/26/2002
From: Tucson
Status: offline 		Hi Galen,

I think i will take your advice on the 225's, ultracoat, and not cuting any foam that i don't have to.

If memory serves, Combat is 5 minutes, starting and pre combat flight goes 90 seconds, so you need fuel for about 7 minutes.

Decided to check another plane using a magnum 28 and 6 OZ tank. I ran pretty rich (Peak - 1400) and got 10 minutes on the ground @ full throtle. So under the same conditions i should get 6.6 minutes out of the 4 ounce, Pobably will work if keep the throtle down before combat starts, and of course running a little leaner, but with foaming the manual warned about, it is just a little close for comfort, besides, 20 minute half throtle practice flights sound good.

well i guess it is time to just get this done, and start chasing tail!

Thanks,
Joe Shmo

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       Post #: 6

Preditor Modifcations - 3/7/2002 10:21:39 AM   
Dave McDonald



Posts: 1334
Joined: 1/4/2002
From: Eldon, MO, USA
Status: offline 		Shmo,
IMHO, adding wingtips or changing the fin isn't worth the trouble.

Originally I was going to put lightening holes in my Predator, but forgot to cut them out before covering it. In hindsight, I'm glad they aren't cut out because I'm not so sure it would have survived through several midairs, and one radio failure.

I would definitely use Ultra cote instead of Econokote.

I use a 6oz tank with an OS 40FP. That gives enough time to get airborne, fly 5 minutes of combat, and still have enough fuel to setup the landing approach. Besides, there's no rule that says you can't use a partially full 6oz tank.......but it sure it tough to put 6oz in a 4oz tank!

Hitech 85MG or 225MG? No experience with either one so I won't guess. But avoid using sloppy servos or your chances of having elevon flutter will go way up! I used Futaba S-148 servos with the LDM ball bearing conversion on the elevons. So far, no flutter....even during full power hot pursuit dives.

This was my first experience with using Goop, and I was impressed. I would recommend giving it a try. In my area, K-Mart has it.

Thicker plastic for home plate needed? Nope. It works perfectly as designed.

Magnum 28 or MVVS 26 combat? Can't help you here. I opted for an OS 40FP instead.

Opinions? The Predator is an extremely rugged combat design that flys well. But I deviated from the instructions and moved my balance point back to 8 5/8" from the hingeline, and added 2 degrees of downthrust to the engine to improve the flying characteristics. For additional details about my Predator, go here:
http://mypage.yhti.net/~dmcdnld/predator.htm

_____________________________

McDDD
ProBro 415

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Preditor Modifications? - 3/10/2002 10:20:22 AM   
littlepiston



Posts: 1115
Joined: 1/24/2002
From: carlsbad, NM, USA
Status: offline 		were can i get one?

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       Post #: 8

Preditor Modifications? - 3/10/2002 10:33:46 AM   
shmo46


 

Posts: 418
Joined: 1/26/2002
From: Tucson
Status: offline 		Hey Little,

Try [url]www.tufflight.com[/url] or your LHS can order them.

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       Post #: 9

Preditor Modifications? - 3/10/2002 10:35:37 AM   
littlepiston



Posts: 1115
Joined: 1/24/2002
From: carlsbad, NM, USA
Status: offline 		did not work!
Forbidden
You don't have permission to access / on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.


--------------------------------------------------------------------------------

Apache/1.3.22 Server at [url]www.tufflight.com[/url] Port 80

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       Post #: 10

Try again later - 3/10/2002 10:39:24 AM   
Slocum



Posts: 255
Joined: 1/24/2002
From: Mt. Vernon, IN, USA
Status: offline 		It looks like the server is fubar. Check back in a day or two. That is the right address.


_____________________________

Independent AMSOIL Dealer
http://amsoil.poseyflyers.com

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       Post #: 11

Preditor Modifications? - 3/10/2002 10:40:37 AM   
littlepiston



Posts: 1115
Joined: 1/24/2002
From: carlsbad, NM, USA
Status: offline 		ok thank you

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       Post #: 12

Preditor Modifications? - 3/20/2002 10:08:36 PM   
FlyingGreg



Posts: 583
Joined: 1/21/2002
From: West Chester, OH, USA
Status: offline 		Hey Shmo:

You will love the Predator. I have two that have survived many combat events and high speed encounters with mother earth with no lasting damage--and a few of the mid-airs have been spectacular.

I built mine according to the plan, 225 MG servos and 6 ounce tank. Even with the throttle servo protector suggested by Tufflight, I stripped my servo during an crash and since it is glued in, etc. was not able to easily replace. My point is not to skimp on the throttle servo.

I detracted from the plan by covering one of my birds with rip stop nylon prior to Ultracote--made it very strong with little weight gain. I fly one with a Norvell .25 plain bearing that really cooks and the other with a TT Pro-.25 that is adequate, but not really a barn burner.

I tried wing plates. Looked like a Clingon fighter, but really didn't role any faster.

The four ounce tank will provide enough run time for a normal five minute heat, but the problem is, it's hard to get good fuel draw of the entire tank--expecially when you are banking and yanking in combat. I am trying a 5.5 oz Tetra bladder tank this year that the pylon guys use. I moved the 6 oz tank forward, drilled a couple of holes in the home plate and wire tied the tank right behind the engine. I needed the nose weight anyway so it has worked well.

I agree with the person that recommended laying out the servos, battery and receiver prior to cutting holes for them. Both my Predators came out tail heavy by installing the equipment as shown on the drawings.

As for larger fin, I started that way but am now flying both with a fin that is smaller than the one shown with no adverse effects.

The guys I fly combat with are flying T-Rex's and Bat Tricks--both extremely durable and highly specialized combat ships, but I would pit the Predator with any of them with respect to performance and durability.

Good luck!

_____________________________

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       Post #: 13

Preditor Modifications? - 3/21/2002 5:46:14 AM   
shmo46


 

Posts: 418
Joined: 1/26/2002
From: Tucson
Status: offline 		Thanks Greg,

Rip stop sounds like a great idea. Turns out i have some Icarex (lightest ripstop) sitting in my closet! Do you have to spray the rip stop with 3M 77 before attaching the ultracote?

Unfortunatly i did skimp on the throtle servo thinking the tube link would protect it enough. I am wondering if there is a better way to do the throttle linkage. Maybe a shorter length of fuel tube? Dubro servo saver do das? Maybe i'l come up with something and have something to contribute back to this thread.

Almost done with the first one. Looking forward to trying this out this weekend!

Thanks again,

Joe

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       Post #: 14

Throttle servo - 3/21/2002 5:52:16 AM   
Slocum



Posts: 255
Joined: 1/24/2002
From: Mt. Vernon, IN, USA
Status: offline 		Don’t over engineer the throttle servo. If the fuel line is too long it won’t separate. Separation on impact is GOOD!


_____________________________

Independent AMSOIL Dealer
http://amsoil.poseyflyers.com

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       Post #: 15