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C-ARF Ultra Flash build Thread + Video

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C-ARF Ultra Flash build Thread + Video

Old 03-25-2011, 11:23 PM
  #476  
Ron v U
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Default RE: C-ARF Ultra Flash build Thread + Video

Just a few pictures before the first flight last week.
I hope to make pictures or a video this weekend of the second flight.

Regards Ron.
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Old 03-25-2011, 11:27 PM
  #477  
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Default RE: C-ARF Ultra Flash build Thread + Video

My UF is ready for maiden on Sunday. I ended up needing 3oz of lead in the tail because of the lighter TamJet pipe. All up dry weight is just a hair under 21 lbs! That's with a smoke system! She's really going to move with the 160SX! [8D] Looking forward to flying the Flash again!
Old 03-26-2011, 05:48 AM
  #478  
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Default RE: C-ARF Ultra Flash build Thread + Video

21 lbs with a P-160? Good grief - you have built a rocket ship, not an Ultra Flash! Anybody have a radar gun there? Would be intereseted in how close you get to 199.999!!
Regards,
Gus
Old 03-26-2011, 08:36 PM
  #479  
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Default RE: C-ARF Ultra Flash build Thread + Video

160 SX
I had a 160 in mine for the first twenty flights, then i sent it in and while it was serviced i used a 120SX. Didnt really notice that much difference in all out speed. Takeoffs were a little shorter, but i was surprised at how little difference it really made.
While i had the 160, my friend had his 120, and people watching could not substantiate which was faster. Both are fun, is the bottom line. Enjoy.
John
Old 03-26-2011, 11:17 PM
  #480  
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Default RE: C-ARF Ultra Flash build Thread + Video

I went with the 160SX because I had it lying around. There is video on YouTube of David Shulman flying my old P-120SE powered Flash with a Titan SE powered Flash and the difference was minimal.
Old 03-30-2011, 04:51 AM
  #481  
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Default RE: C-ARF Ultra Flash build Thread + Video

Hello everyone,

In the manual its mentioned that I need to get the inner thrust tube to at least 8 mm to the outer thrust tube. To acheive that I need to insert the pipe into the bell mouth only 5 mm which is too little. At the end, My setup ended up with 15 mm to the outer thrust tube. I didn't think it would make any difference, what do you think?

Hassan
Old 03-30-2011, 07:53 AM
  #482  
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Default RE: C-ARF Ultra Flash build Thread + Video

I got five flights on my UF this Sunday. The plane flies incredibly well and feels more precise than the classic Flash! My first landing was a mess as I wasn't anticipating that the plane would float as much as it did! It lands a lot slower than my classic Flash did. Good thing I was on a 7000' runway! Subsequent landings only used up a few hundred feet. This plane is a winner!
Old 03-30-2011, 08:03 AM
  #483  
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Default RE: C-ARF Ultra Flash build Thread + Video

7,000' of runway? Could we borrow 50' of that so we would have 700' here in Colorado?
Seriously, congratulations on the flights. I'm planning on going to Phoenix the third week of April, so hope to catch up on the UF flights that I'm missing here due to wind, fog, temperature, etc., etc.
Regards,
Gus
Old 03-30-2011, 10:08 AM
  #484  
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: hyman

Hello everyone,

In the manual its mentioned that I need to get the inner thrust tube to at least 8 mm to the outer thrust tube. To acheive that I need to insert the pipe into the bell mouth only 5 mm which is too little. At the end, My setup ended up with 15 mm to the outer thrust tube. I didn't think it would make any difference, what do you think?

Hassan
Hassan

MMmmmm Why? All Flashes are the same. 15mm is really too much and you will lose some thrust, ok from running and cooling though. With your carbon bell mount does it come through the rear wing opening former much?

Dave
Old 03-30-2011, 02:46 PM
  #485  
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Default RE: C-ARF Ultra Flash build Thread + Video

My local field is only 516', so the longer runway was a welcome break. Hope you have some good flying weather soon!
Old 03-30-2011, 02:55 PM
  #486  
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Default RE: C-ARF Ultra Flash build Thread + Video

Good to hear it is workin good for you Dantley. I'll still smoke ya with my classico!
Old 03-30-2011, 03:26 PM
  #487  
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Default RE: C-ARF Ultra Flash build Thread + Video

i just watched the video of dave shulman flying the ultra on a p80...i am impressed... very fast.. i think they were able to get 185mph out of it.. so i am thinking 199.99 with the 120sx...hehehehe..........cant wait to fly mine...
Old 03-30-2011, 03:39 PM
  #488  
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: AFTERBURNER1

Good to hear it is workin good for you Dantley. I'll still smoke ya with my classico!
Them fighting words! Didn't Shulman beat you with my P-120 powered Flash? Oooohhhhhh!!!
Old 03-30-2011, 04:22 PM
  #489  
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Default RE: C-ARF Ultra Flash build Thread + Video

I got 225 on a strong downwind pass with my CF and a P120SX. really got the adrenalin going. got to love it . looking forward to the ultra flash fast pass!
Old 03-30-2011, 05:56 PM
  #490  
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Default RE: C-ARF Ultra Flash build Thread + Video

[X(]

You do mean 199 mph yes?
Old 03-30-2011, 05:58 PM
  #491  
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Default RE: C-ARF Ultra Flash build Thread + Video

ORIGINAL: dubd


ORIGINAL: AFTERBURNER1

Good to hear it is workin good for you Dantley. I'll still smoke ya with my classico!
Them fighting words! Didn't Shulman beat you with my P-120 powered Flash? Oooohhhhhh!!!
I seem to recall my right main was hanging in the wind all weekend too. New gear that goes up and stays up all da time..

Bring it sonny!

Maybe the other one will drop [>:]
Old 03-30-2011, 10:41 PM
  #492  
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: Dave Wilshere


ORIGINAL: hyman

Hello everyone,

In the manual its mentioned that I need to get the inner thrust tube to at least 8 mm to the outer thrust tube. To acheive that I need to insert the pipe into the bell mouth only 5 mm which is too little. At the end, My setup ended up with 15 mm to the outer thrust tube. I didn't think it would make any difference, what do you think?

Hassan
Hassan

MMmmmm Why? All Flashes are the same. 15mm is really too much and you will lose some thrust, ok from running and cooling though. With your carbon bell mount does it come through the rear wing opening former much?

Dave

Dave the inner thrust tube is in the bellmouth 10 mm as mentioned and the bell mouth is flush on the bulkhead
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Old 03-30-2011, 11:37 PM
  #493  
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Default RE: C-ARF Ultra Flash build Thread + Video

I can see that CARF has the Graupner DES 707 servo on their "combo" page for the UF, have any of you experience with this servo in the UF (or any other plane for that matter...) ?

http://www.carf-models.com/public_ca...dle&proId=2426
Old 03-31-2011, 08:26 AM
  #494  
Dave Wilshere
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: hyman


ORIGINAL: Dave Wilshere


ORIGINAL: hyman

Hello everyone,

In the manual its mentioned that I need to get the inner thrust tube to at least 8 mm to the outer thrust tube. To acheive that I need to insert the pipe into the bell mouth only 5 mm which is too little. At the end, My setup ended up with 15 mm to the outer thrust tube. I didn't think it would make any difference, what do you think?

Hassan
Hassan

MMmmmm Why? All Flashes are the same. 15mm is really too much and you will lose some thrust, ok from running and cooling though. With your carbon bell mount does it come through the rear wing opening former much?

Dave

Dave the inner thrust tube is in the bellmouth 10 mm as mentioned and the bell mouth is flush on the bulkhead

Strange! Looks as mine, I'll go and look... Maybe your fuselage tail cone was not trimmed as much and is longer.

My tail pipe was only inserted 8mm and looking at my model the outer pipe is 1.5-2mm back from the tail cone, so these mm add up.

Dave
Old 03-31-2011, 04:19 PM
  #495  
hyman
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Default RE: C-ARF Ultra Flash build Thread + Video

Dave you're probably right about the tail cone, i'll try this setup and see how it goes coz
ORIGINAL: Dave Wilshere


ORIGINAL: hyman


ORIGINAL: Dave Wilshere


ORIGINAL: hyman

Hello everyone,

In the manual its mentioned that I need to get the inner thrust tube to at least 8 mm to the outer thrust tube. To acheive that I need to insert the pipe into the bell mouth only 5 mm which is too little. At the end, My setup ended up with 15 mm to the outer thrust tube. I didn't think it would make any difference, what do you think?

Hassan
Hassan

MMmmmm Why? All Flashes are the same. 15mm is really too much and you will lose some thrust, ok from running and cooling though. With your carbon bell mount does it come through the rear wing opening former much?

Dave

Dave the inner thrust tube is in the bellmouth 10 mm as mentioned and the bell mouth is flush on the bulkhead

Strange! Looks as mine, I'll go and look... Maybe your fuselage tail cone was not trimmed as much and is longer.

My tail pipe was only inserted 8mm and looking at my model the outer pipe is 1.5-2mm back from the tail cone, so these mm add up.

Dave
Old 03-31-2011, 05:06 PM
  #496  
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Default RE: C-ARF Ultra Flash build Thread + Video

the tailcone does not change anything because the outer pipe has the 2 clips pre set from the factory. the problem is you have to pull the inner thrust tube very close to the outer edge of the carbon bell. my first flash i used 1/8th rivits and the holes were almost to the edge of the thrust tube. on my ultra flash i used 2-56 machine screws with a much smaller hole and attached the screws with blind nuts turned upside down on the carbon bell mouth. after i tightened the screws i put a drop of CA on each blind nut to hold to the carbon. with this set up my thrust tube only goes into the bell mouth about 1/8th" and my space at the tail is 7.5mmas per instructions.
Old 03-31-2011, 06:08 PM
  #497  
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: AFTERBURNER1

ORIGINAL: dubd


ORIGINAL: AFTERBURNER1

Good to hear it is workin good for you Dantley. I'll still smoke ya with my classico!
Them fighting words! Didn't Shulman beat you with my P-120 powered Flash? Oooohhhhhh!!!
I seem to recall my right main was hanging in the wind all weekend too. New gear that goes up and stays up all da time..

Bring it sonny!

Maybe the other one will drop [>:]
Looking forward to smokin' it up!
Old 03-31-2011, 10:43 PM
  #498  
Dave Wilshere
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Default RE: C-ARF Ultra Flash build Thread + Video


ORIGINAL: skynet33

the tailcone does not change anything because the outer pipe has the 2 clips pre set from the factory. the problem is you have to pull the inner thrust tube very close to the outer edge of the carbon bell. my first flash i used 1/8th rivits and the holes were almost to the edge of the thrust tube. on my ultra flash i used 2-56 machine screws with a much smaller hole and attached the screws with blind nuts turned upside down on the carbon bell mouth. after i tightened the screws i put a drop of CA on each blind nut to hold to the carbon. with this set up my thrust tube only goes into the bell mouth about 1/8th'' and my space at the tail is 7.5mmas per instructions.
Tabs are pre fitted, but you can use a small packer on the former to move the outer tube forward. I use a 3/32" packer to move the outer tube forward in the fuselage 2.5mm.

Dw
Old 04-01-2011, 01:54 AM
  #499  
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Default RE: C-ARF Ultra Flash build Thread + Video

good point Dave. my outer tube seemed to be in the correct positionout of the box.
Old 04-03-2011, 01:49 PM
  #500  
ricardinho
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Default RE: C-ARF Ultra Flash build Thread + Video

hello was curious to see what connectors you guys are using for the wing tank setup.thanks...pat

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