C-ARF Ultra Flash build Thread + Video
10-06-2015, 12:07 PM
#4902
Thread Starter
As the manual...but like he said.
Its a must to have a second tank unless you have a Hawk turbine. Wing tank is my favoured one. It just works great-never had a problem.
Dave
Its a must to have a second tank unless you have a Hawk turbine. Wing tank is my favoured one. It just works great-never had a problem.
Dave
10-07-2015, 03:01 AM
#4903
any videos ?
I fly 7 minutes with saddle tanks and Jets Munt 200X. I'm at 30 - 40% throttle most of the time which is great for the engine. I land with almost 40% fuel left in the center tank. Total capacity of the modified kevlar saddle tanks (to accommodate by pass) and kevlar center tank is approx. 3700 ml...
Love the UF.. got a second one in the works...
David..
Love the UF.. got a second one in the works...
David..
10-13-2015, 02:11 AM
#4904
Softer wharves for the Ultra flash?
Hello!
I have a problem with my Ultra, flight in track of tar and on having landed always throws me, equally because I have to enter more slow but the fault I think that also it her has the wharves of my train that are very hard and am determined to change them into softer some and it wanted to know if already someone of you they had changed it and could help me!
My Struts are equal that these!
http://www.motorsandrotors.co/index....roducts_id=619
Thank you very much!
Hello!
I have a problem with my Ultra, flight in track of tar and on having landed always throws me, equally because I have to enter more slow but the fault I think that also it her has the wharves of my train that are very hard and am determined to change them into softer some and it wanted to know if already someone of you they had changed it and could help me!
My Struts are equal that these!
http://www.motorsandrotors.co/index....roducts_id=619
Thank you very much!
Last edited by Ruymán; 10-13-2015 at 02:17 AM.
10-13-2015, 03:05 AM
#4905
Thread Starter
Can you post a picture of your main gear, also from front or rear (nose or tail)
I think I understand your question, the Springs will not be too hard. I guess wheel alignment if you are saying the ground tracking is bad
Dave
I think I understand your question, the Springs will not be too hard. I guess wheel alignment if you are saying the ground tracking is bad
Dave
10-13-2015, 08:04 AM
#4906
Hello Dave!
I what I him find my struts it is that they are very hard through the fault of the wharf and in the landings the plane is in the habit of bouncing me and it wanted to know if someone has changed the wharves into the softer some!
My Ultra with the P-100RX weighs emptiness 10 kilos and when I put it in the soil full of fuel I see that the wharves not flexan nevertheless in other companions' jets of the club I observe that always they yield a bit and his landings do not bounce against the soil.
For example in this Aly's landing it is I see as the plane falls something strong against the soil but this one remains stuck to the soil as also I observe when it rolls about the soil that the wharves flexan. With my wharves surely the plane had got up of the soil more than one meter do not be if I explain well.
https://www.youtube.com/watch?v=NHMfLYIi2PE
I what I him find my struts it is that they are very hard through the fault of the wharf and in the landings the plane is in the habit of bouncing me and it wanted to know if someone has changed the wharves into the softer some!
My Ultra with the P-100RX weighs emptiness 10 kilos and when I put it in the soil full of fuel I see that the wharves not flexan nevertheless in other companions' jets of the club I observe that always they yield a bit and his landings do not bounce against the soil.
For example in this Aly's landing it is I see as the plane falls something strong against the soil but this one remains stuck to the soil as also I observe when it rolls about the soil that the wharves flexan. With my wharves surely the plane had got up of the soil more than one meter do not be if I explain well.
https://www.youtube.com/watch?v=NHMfLYIi2PE
10-13-2015, 12:08 PM
#4907
Thread Starter
Its not the strong springs that make it bounce, I guess its too fast on touch down. Ali's model would be much heavier than yours, flexing on the ground is probably the braking. What flap set up do you have?
Ali will be landing really gently, tiny elevator inputs for perfect touch down.
Ali will be landing really gently, tiny elevator inputs for perfect touch down.
10-13-2015, 12:48 PM
#4908
Its not the strong springs that make it bounce, I guess its too fast on touch down. Ali's model would be much heavier than yours, flexing on the ground is probably the braking. What flap set up do you have?
Ali will be landing really gently, tiny elevator inputs for perfect touch down.
Ali will be landing really gently, tiny elevator inputs for perfect touch down.
10-13-2015, 11:55 PM
#4910
I will bear it in mind Dave but I continue thinking that the wharves are very hard because all the wharves of them different Jets that exist in my club sedate when the model rests on the soil and mine not!
Thank you very much!
Thank you very much!
10-14-2015, 04:04 AM
#4911
Thread Starter
On a straight leg jet there is little movement with the spring, the trailing link leg is because of holes, lumps etc forcing the leg backwards
Dave
Dave
10-14-2015, 08:11 AM
#4912
Join Date: Sep 2007
Location: buenos aires, ARGENTINA
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thereīs something i canīt quite undestand,if thereīs a problem with main tanks because of itīs shape clunck could get some air,and then into the uat,whatīs the idea of adding wing tank>main>uat,when wing tank runs out of fuel itīs like it never been there...
10-14-2015, 10:36 AM
#4913
Thread Starter
Yes, but why is that a problem? Its like a taxi tank in the air!
The system works like it was designed, 10's of thousands of flights prove this.
The system works like it was designed, 10's of thousands of flights prove this.
10-14-2015, 10:55 AM
#4914
I agree with less crow and more flaps on the UF.. It seems that UF does not like too much crow.. too much crow reduces lift which you need on a nice flair landing to bleed speed.
David..
David..
10-14-2015, 11:17 AM
#4915
Thread Starter
No CROW is needed :-)
Like all the UF's I set up by preference, the addendum flap amounts work for most people. CROW dumps too much lift with the UF wing, its just not needed with the design.
For the 'I need it' brigade, I set a few mm and they are happy its there, even if it has little affect at such small amounts ;-)
Like all the UF's I set up by preference, the addendum flap amounts work for most people. CROW dumps too much lift with the UF wing, its just not needed with the design.
For the 'I need it' brigade, I set a few mm and they are happy its there, even if it has little affect at such small amounts ;-)
10-14-2015, 03:52 PM
#4916
Join Date: Sep 2007
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Dave as you said before,you wouldnīt fly UF with only main tank,because of itīs shape the clunck gets air on a dive,so after a few minutes if you empty the wing tank that risk appears again,am i right?
10-14-2015, 10:46 PM
#4917
Thread Starter
Yes, but only because its not big enough alone! Pure capacity.
If you look way back you will see pictures of my hopper tank after an 8 min flight and there is almost no air. The last 5 minutes of the flight would be on the fuselage tank.
Only rule is a high flow Felt Clunk in the tanks. (the clunk supplied with the tank now is too restrictive)
If you look way back you will see pictures of my hopper tank after an 8 min flight and there is almost no air. The last 5 minutes of the flight would be on the fuselage tank.
Only rule is a high flow Felt Clunk in the tanks. (the clunk supplied with the tank now is too restrictive)
10-15-2015, 02:31 AM
#4918
Join Date: Sep 2007
Location: buenos aires, ARGENTINA
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Yes, but only because its not big enough alone! Pure capacity.
If you look way back you will see pictures of my hopper tank after an 8 min flight and there is almost no air. The last 5 minutes of the flight would be on the fuselage tank.
Only rule is a high flow Felt Clunk in the tanks. (the clunk supplied with the tank now is too restrictive)
If you look way back you will see pictures of my hopper tank after an 8 min flight and there is almost no air. The last 5 minutes of the flight would be on the fuselage tank.
Only rule is a high flow Felt Clunk in the tanks. (the clunk supplied with the tank now is too restrictive)
10-15-2015, 07:01 AM
#4919
This is why I run my main tank into wing tank into header. I don't use felt clunks and never end up with air in my header tank. It is better for fuel to be running from a higher tank to a lower tank- the hydrostatic pressure aids fuel flow also.
10-20-2015, 09:04 AM
#4923
Thread Starter
Bob
i didn't actually build this one, it was done by one of our local guys who I can trust to build to our acceptable standards! I'm not sure how many I have actually built, it's quite a few, but I just don't get the time to do many customer builds now. I have had a new UF for myself sitting in a box most of this year and it going to be a next season model now!
Setting up and test flying Flash and Ultra Flash models I'm in the hundreds now, this year for the first time ever I'm trying to keep a dairy of test flights so I can look back at the years end and see how many there were.
Dave
i didn't actually build this one, it was done by one of our local guys who I can trust to build to our acceptable standards! I'm not sure how many I have actually built, it's quite a few, but I just don't get the time to do many customer builds now. I have had a new UF for myself sitting in a box most of this year and it going to be a next season model now!
Setting up and test flying Flash and Ultra Flash models I'm in the hundreds now, this year for the first time ever I'm trying to keep a dairy of test flights so I can look back at the years end and see how many there were.
Dave
10-20-2015, 05:40 PM
#4924
David, and Dave.. Whats your thoughts on using a header tank such as a 12oz header that is between the fuse tank and the trap..
I saw one before like that, and it definitely kept the trap from airing up. thoughts?
I saw one before like that, and it definitely kept the trap from airing up. thoughts?
10-20-2015, 09:38 PM
#4925
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Hi Goose,
my setup wing tank>>fuse main tank>>air trap. using Dave M&R special high flow felt clunk in the fuse main tank, NO AIR NEVER in the trap.
Have the clunk in all my planes.
Michel
my setup wing tank>>fuse main tank>>air trap. using Dave M&R special high flow felt clunk in the fuse main tank, NO AIR NEVER in the trap.
Have the clunk in all my planes.
Michel