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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 9/25/2012 9:12 PM   
koenig427


 

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Status: offline 		I like the idea of mechanical retracts, is this plane set up for it?

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 9/26/2012 4:07 AM   
Huang


 

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Status: offline 		Phoenix was not really setup for mechanical retracts. The manual shows set up for Robart pneumatics, although I don't see why you can't put mechanicals in. You will have to cut and mount a retract servo in the wing and route the pushrods through a cutout in the plastic well, and use a separate retract servo for the nose.

Electric retracts are by far easiest, if you go with Robart electrics it is literally plug and play, as they are exactly same size as the pneumatics. PZ retracts work great too at much lower cost if you can make a steering mechanism for the nose.

I recall my Southern Pro (Dave Brown) nose retract unit to be firewall mounted. If that is the case it may not work well for the P7 because the retract hardwood rails will be in the way. It is easier to use one that is belly mounted, like the Hobbico/EZ.

The Dirty Birdy ARF otoh was setup for Hobbico mechanicals from the start, manual includes templates for the linkages.
Matt


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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/19/2013 2:50 AM   
pitstop000



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Hey Guys, this might be a good time to pick up a new P-7 or a second one.

 

I was at HH site today and it looks like their running a special on the P-7’s.

 

http://www.horizonhobby.com/products/phoenix-7-pattern-60-arf-HAN4755

 

It’s listed for only $249.99, that’s better than the GP DB! Wow!



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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/19/2013 5:04 AM   
KLXMASTER14



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Status: offline 		That's the steal of a deal!!! Might have to pick up one and stick it in the shed for when the inevitable happens.

-Robert

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/19/2013 5:17 AM   
pitstop000



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Hey Robert, it sure is Bud!!



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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/19/2013 8:45 PM   
auggie622


 

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Status: online 		 Actually, that price has been around for the better part of last month on the other well know site + free shipping. I pickup one for $217 (damage box) - kit was in excellent shape. You can get slightly better deals if you let your fingers to the probing.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/26/2013 1:36 PM   
tgwhitley


 

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Status: offline 		 How will a 91 4s fit in P7 and effect cg?

Tim



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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 1/27/2013 1:39 AM   
KLXMASTER14



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quote:

ORIGINAL: tgwhitley

 How will a 91 4s fit in P7 and effect cg?

Tim




Tim,
I know that it has been done. I can't give any specifics, but if you review this lengthy thread, I believe that you may well find your answer.

-Robert

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 2/4/2013 2:46 AM   
RCDENT



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Status: offline 		I'm recuperating from some surgery and finishing up my P7 finally.  I'm installing Dave Brown Southern Pro mechanical retracts.  Interestingly, I found the H9 factory nose gear rails and the fuselage servo plate remove surprisingly easily with minimal tugging/prying/flexing the fuse sides, etc.  A little measuring and drilling, and you can then bolt the Southern Pro nose unit to the rear of the firewall.   I had Kraft electric retracts in my P7 and other pattern planes back in the day and they were very reliable UNTIL the advent of high-reving engines and tuned pipes.  Even though mounted in a foam-lined box, the nose gear predictably failed after about 12-15 flights.  The vibration would kill the motor and/or break wires.  I finally got fed up with it, jerked out the Kraft nose gear, and installed a Southern Pro nose unit activated by a servo in the fuse.  The Kraft mains were left in.  End of retract problems!

I weighed the Southern units minus strut, and they are about 1.7 oz each.  My two retract servos weigh about 1.5 oz each.  The P7 instructions say nothing about it, but there is a retract servo mount in the wing root, accessable just by cutting away the Ultracote.  Will try to post some pics when I get the install done.  You can operate all three gears from a single servo in the wing, but the nose hookup is kind of a pain when assembling the model at the field.  I always felt the extra 1.5 oz weight penalty was worth the convenience.  I believe the units are currently available, and you can even order individual replacement parts.  

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 2/4/2013 2:56 PM   
RCDENT



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Status: offline 		Weighed my entire Dave Brown retract "system" all together, minus struts.  All three units and one retract servo weigh just over 6 oz.  Add the second servo (which I intend to use) for an all-up weight of 7.5 oz.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/7/2013 11:48 AM   
RCDENT



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Finished everything up and logged in a couple test flights on Sunday.  Wind was terrible with 12-15 mph gusty crosswind (but this IS Texas and that's what pattern planes are made for).  Very little trim required for normal straight and level flight.  Hard to tell about much else under those conditions.  Gave every indication of being a sweet bird.

Final flying weight came out to 7-3/4 lbs with Dave Brown mechanical retracts and 2 JR retract servos, O.S. 61SF with Mac's muffler.  Used a Zinger 11x7.5 prop, Powermaster 10%.  Will try to get some pics up of the retract install.  This forum was a lot of help in getting this ship in the air.  Thanks to everyone!



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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/7/2013 2:26 PM   
computermonkey


 

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Status: offline 		Hi RCDENT,
Can you give some rpm specs on the OS61SF too?
Thanks

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/9/2013 9:30 PM   
RCDENT



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Status: offline 		Sorry, only about 12 grand.  I was using an old, tired 61SF ringed.  I think it needs a new ring.  Runs OK, just doesn't have the power one would expect.  Swapped it out for a brand new one this week, but it'll require some break in and tweaking.  Hope to get some flights on it tomorrow, but weather doesn't look too promising.  I decided to maiden the plane with the old engine, so if the worst happened, I wouldn't be sticking a brand new OS in the dirt.  Now that I have some confidence in the plane, I'm anxious to get the new engine going.   Will probably put a pipe on it at some point.  I'm thinking 11x7.5 or 11x8 Zinger props.  Anyone have any other suggestions?  Have been running Powermaster 10% fuel with Rossi R7 plugs.

I'm thinking I may have to run one of the Perry pumps to deal with the tank position issue, even though I'm using a Hayes 16oz tank which is a bit lower than the kit tank.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 3:49 AM   
lfinney


 

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Status: offline 		12x8 as a minimum with muffler i seriously doubt the need for a pump


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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 12:16 PM   
robc57


 

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Status: offline 		I'd never get away with an 11" prop on noise grounds!
I run my SFs on a 12*10W APC with a full length pipe for pulling a 7 1/2 lb Tornado or 12*9 with a short throttle pipe on an 8 1/4 lb foam and glass Blue Angel.  
I've got one in a Jungmeister turning a 13*7 with a Pitts muffler.


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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 5:48 PM   
computermonkey


 

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Status: offline 		What should the rpm's be set when pulling a APC12x10w with the OS61SF?

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 9:03 PM   
robc57


 

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quote:

ORIGINAL: computermonkey

What should the rpm's be set when pulling a APC12x10w with the OS61SF?

Sorry, I'm not sure I understand the question.  If you mean what rpm will it turn that prop at, I really don't know but I'd guess around 10k on the ground.  I think 'enough' would be the answer for me.  The engine is set as with any other prop, peak revs then back off a few notches though with the pipe there's some trial and error involved as the revs pick up a fair bit in flight so it needs to be richer than usual on the ground. 



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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 9:19 PM   
computermonkey


 

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Status: offline 		Ya sorry I wasn't all that clear. I was wondering what the engine turned with the 12x10w. I was thinking that sounded pretty big for the SF. I remember the Hanno's turning that size of prop.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/10/2013 11:46 PM   
robc57


 

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Status: offline 		at the club I fly with the noise is strictly monitored so getting it under 80dBa at 7 metres was the defining factor rather than outright performance but lets say the power is adequate for the Tornado, a typical sort of mid 70s pattern model


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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 1:24 AM   
computermonkey


 

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Status: offline 		robc57 thanks for sharing. Interesting to know how others participate in the hobby.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 2:31 AM   
RCDENT



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From: SAN ANTONIO, TX, USA
Status: offline 		Didn't get to fly today.  Yesterday was rain and today worse wind than last Sunday.  It's apparent from the last few posts that I'm WAY under-proping the SF.  I guess I'm just "lost in the '80's", longing for the scream of short stroke Rossi's and YS's.  My old SF was a hand me down from my son-in-law and had been happy in my Hangar 9 P-51 .60 turning 13x6 and 13/7 with a scale type muffler.  I'm going to order an assortment of 12 inchers for the new SF.  I'm also thinking of ordering the "pre-tuned" Macs pipe system that Tower Hobbies shows for the SF.  Any thoughts?   I'll let everyone know how it works out when I get some air time of the setup.  Thanks for everyone's input!

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 2:38 AM   
computermonkey


 

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Status: offline 		Be careful of the pre-tuned pipe from MACS. I think you might find them to short for the 12 inch props.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 2:43 AM   
RCDENT



Posts: 181
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From: SAN ANTONIO, TX, USA
Status: offline 		Weather was a bust this weekend, so no more test flying until next Saturday.  It's apparent from the last few posts that I'm WAY under-proping the SF.  I guess I was just "lost in the '80's" longing for the scream of short stroke Rossi's and YS's.  Actually the SF I flew last weekend is a hand me down from my son-in-law and it had been happy in my Hangar 9 P-51.60 turning a 13x6 with a scale type muffler for several years.  Tonight I'm ordering an assortment of 12 inch'ers to try on the new SF that is now in the P7.  Will let everone know how it works out after I get some air time.  Thanks for all the helpful input!

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 7:11 AM   
energyman


 

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Status: offline 		I ran the rear exhaust SF pumper in the late 80's with a DW 12x10 on a MK Joker. If memory serves me correctly, I was getting about 10,500 - 11,000 rpm. I second the opinion regarding the Mac's pre-tuned setup being too short for the SF. I currently have a Rossi long stroke 60 that has a Rossi long chamber pipe and uncut header that turns an APC 12x10 at 10,800 on Powermaster 5%. Mac lists a pipe for a long stroke 60. The part number is 1062. I have no experience with this pipe.

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RE: Scoop! Hangar 9 Phoenix 7...ARF!!! - 3/11/2013 11:36 AM   
RCDENT



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Status: offline 		Sorry for the duplicate post.  Was having some computer issues and thought the first one was lost.

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