Old Skool Phase 6

DrFragnasty · Sep 11, 2009, 05:39 PM

Chris Foss's Phase 6 is a fave of mine and I thought with a deeper fuz and lower frontal area, vac-bagged wing with live-hinged flaps and ailerons and an all-moving tail I could reduce drag and make it go a bit faster and have better knife-edge performance.

Other mods: 2 piece wing with joiner/ joiner box and plug in mpx connectors.

e374 and 1.7m span. HT13 tail section.

Chris.

Phil.Taylor · Sep 11, 2009, 05:45 PM

a phase 6 1/2 !
interested to know how this goes

Phil.

DrFragnasty · Sep 11, 2009, 05:47 PM

Next up;

joiner box
aerial conduit (using old pushrod outer)
sand wing tips
sand spar recess
re-do the tail pivot (waiting on 4mm carbon rod though)

DrFragnasty · Sep 12, 2009, 04:52 AM

It should be more rigid and faster I guess Phil. No real change to the moments/ aerofoil just lower drag. The flaps will add to versatility and the live hinging and wipers should help lower drag too.

AUW about the same as the orginal.

flyonline · Sep 12, 2009, 04:59 AM

Looks nice Chris!!

What's that BAT (big ass thing) in the background?

Steve

DrFragnasty · Sep 12, 2009, 05:08 AM

ex-Modelfight 1/4 scale Discus Steve.

Flown once in unfinished state off the slope at Stanley (it goes really well) but currently shelved unitl I find time to finish it off properly.

Chris.

Phil.Taylor · Sep 12, 2009, 06:40 AM

the 2-piece wing is an excellent idea - the big one-piece wing on mine was a pain to transport & store
Phil.

Shedofdread · Sep 12, 2009, 06:44 AM

Quote:

Originally Posted by Phil.Taylor

the 2-piece wing is an excellent idea - the big one-piece wing on mine was a pain to transport & store
Phil.

The whole thing is a top idea - take a good old design and make it even better. Looking forward to seeing the finished article.

S

DrFragnasty · Sep 12, 2009, 08:10 AM

Thanks for the encouragement...it makes doing the tedious jobs that little less unpalatable ;0) I'm off to sand the tips.

Chris.

Hexosex · Sep 12, 2009, 04:34 PM

Makes me want to get my phase 6 back in the air!

Good work, cant wait to see the results and fingers crossed on the knife edge!

DrFragnasty · Sep 18, 2009, 10:25 AM

Spent 2 hrs sorting out slop-free tail crank and rudder pushrod.

This setup is not ideal. If you pull the tail joiner out, the crank falls
inside. It's a bit of a pain to re-locate. I have to remove it to finish off
the fuz.

Next up is plank the fuz turtledeck, bag the tails.

Chris.

DrFragnasty · Sep 18, 2009, 10:34 AM

FYI I'm using West Systems resin with the fast hardener. This gives a 6hr cure.
Also the pivot blocks were reamed out to give a clearance, the hole then filled with bog mix then the waxed joiner inserted and left to set. Remove joiner and you have a solid mount.

Hexosex · Sep 18, 2009, 10:59 AM

I'm using that west systems resin and its so far been a joy to work with.

Good work!

Shedofdread · Sep 18, 2009, 01:57 PM

You sure that joiner's big enough? Don't be taking any chances now!

S

The.Timinator · Sep 18, 2009, 04:17 PM

Lovely Job!

Phase 6 is a classic and your update looks great.

If I were to try something like this I might be looking at a more modern section than E374 though - say, DS19?

Best of luck with it anyway, I just love Chris Foss designs and its great to see them still inspiring people to build in a traditional way

Tim

Sep 11, 2009, 05:39 PM	#1
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	Old Skool Phase 6 Chris Foss's Phase 6 is a fave of mine and I thought with a deeper fuz and lower frontal area, vac-bagged wing with live-hinged flaps and ailerons and an all-moving tail I could reduce drag and make it go a bit faster and have better knife-edge performance. Other mods: 2 piece wing with joiner/ joiner box and plug in mpx connectors. e374 and 1.7m span. HT13 tail section. Chris. Attached Thumbnails deeper fuz by 2" 59.3 KB · Views: 112 thinner by 1" 108.0 KB · Views: 82 chunky med-grain 3/8" sides, no ply doublers or longerons. final finish will be 3/4 oz 'glass. 88.2 KB · Views: 70 tailplane made from Supra core 92.2 KB · Views: 92 107.2 KB · Views: 84 crank made from surplus carbon/balsa/carbon sandwich, clevis from 3D foamy bipe 87.0 KB · Views: 90 93.7 KB · Views: 65 needs a root rib then in the bag 93.2 KB · Views: 101 Last edited by DrFragnasty; Sep 11, 2009 at 05:52 PM. Reason: Extra crunch

Sep 11, 2009, 05:47 PM	#3
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	Progress Next up; joiner box aerial conduit (using old pushrod outer) sand wing tips sand spar recess re-do the tail pivot (waiting on 4mm carbon rod though) Attached Thumbnails Nose is sandwich of King Bily/ hard as nails balsa and medium balsa. King Billy has a recess with 50g of lead in it pre-installed. 90.6 KB · Views: 116 Slightly larger area than old tail. May have to use pull-pull for rudder to go around the tail pivot. 96.2 KB · Views: 80 tips need sanding, aerial conduit installed, joiner box next... 99.4 KB · Views: 185

Sep 18, 2009, 10:25 AM	#11
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	Wip Spent 2 hrs sorting out slop-free tail crank and rudder pushrod. This setup is not ideal. If you pull the tail joiner out, the crank falls inside. It's a bit of a pain to re-locate. I have to remove it to finish off the fuz. Next up is plank the fuz turtledeck, bag the tails. Chris. Attached Thumbnails Old school meets a little carbon. Pivot blocks are the same sandwich as used for the crank. 79.1 KB · Views: 82 laminated with a 1mm ply middle 48.9 KB · Views: 56 The actual bearing are the joiner tubes; lots of bearing surface area. The joiner doesn't pivot. The crank does. To get a no-slop fitment; a bog mix that has the waxed carbon joiner inserted. After curing a verrrrry slight sand and its slop fr 101.0 KB · Views: 80 Rudder horn is PCB. Pushrod is 2mm carbon rod 60.9 KB · Views: 82 Tailplane pushrod is 4mm carbon tube that is housed by F2 & F3. 62.6 KB · Views: 67 Decided to use this buggered Furio joiner. I'll lop 2.5" off it. It's got 3 deg dihedral built-in so housing the boxes in the wing means they can be parallel to the top surface. 59.7 KB · Views: 66 Last edited by DrFragnasty; Sep 18, 2009 at 10:28 AM. Reason: Illogical Spock

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Sep 11, 2009, 05:45 PM	#2
Phil.Taylor Chuck it off a cliff Join Date: Jun 2003 Location: Devon, UK Posts: 2,093	a phase 6 1/2 ! interested to know how this goes Phil.

Sep 12, 2009, 04:52 AM	#4
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	It should be more rigid and faster I guess Phil. No real change to the moments/ aerofoil just lower drag. The flaps will add to versatility and the live hinging and wipers should help lower drag too. AUW about the same as the orginal.

Sep 12, 2009, 04:59 AM	#5
flyonline Lands upside down Join Date: May 2003 Location: Holesville Posts: 2,240	Looks nice Chris!! What's that BAT (big ass thing) in the background? Steve

Sep 12, 2009, 05:08 AM	#6
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	ex-Modelfight 1/4 scale Discus Steve. Flown once in unfinished state off the slope at Stanley (it goes really well) but currently shelved unitl I find time to finish it off properly. Chris.

Sep 12, 2009, 06:40 AM	#7
Phil.Taylor Chuck it off a cliff Join Date: Jun 2003 Location: Devon, UK Posts: 2,093	the 2-piece wing is an excellent idea - the big one-piece wing on mine was a pain to transport & store Phil.

Sep 12, 2009, 08:10 AM	#9
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	Thanks for the encouragement...it makes doing the tedious jobs that little less unpalatable ;0) I'm off to sand the tips. Chris.

Sep 12, 2009, 04:34 PM	#10
Hexosex Byte my shiny metal @ss Join Date: Oct 2006 Location: Cornwall, UK Posts: 616	Makes me want to get my phase 6 back in the air! Good work, cant wait to see the results and fingers crossed on the knife edge!

Sep 18, 2009, 10:34 AM	#12
DrFragnasty Double Coat TimTams Join Date: Mar 2004 Location: Launceston Tasmania Posts: 608	FYI I'm using West Systems resin with the fast hardener. This gives a 6hr cure. Also the pivot blocks were reamed out to give a clearance, the hole then filled with bog mix then the waxed joiner inserted and left to set. Remove joiner and you have a solid mount.

Sep 18, 2009, 10:59 AM	#13
Hexosex Byte my shiny metal @ss Join Date: Oct 2006 Location: Cornwall, UK Posts: 616	I'm using that west systems resin and its so far been a joy to work with. Good work!

Sep 18, 2009, 01:57 PM	#14
Shedofdread Stay calm and carry on Join Date: Aug 2008 Location: Derbyshire, UK Posts: 868	You sure that joiner's big enough? Don't be taking any chances now! S

Sep 18, 2009, 04:17 PM	#15
The.Timinator Its not IF... Its WHEN. Join Date: Feb 2007 Location: West Yorks Posts: 951	Lovely Job! Phase 6 is a classic and your update looks great. If I were to try something like this I might be looking at a more modern section than E374 though - say, DS19? Best of luck with it anyway, I just love Chris Foss designs and its great to see them still inspiring people to build in a traditional way Tim