Extreme Flight 88" Yak - Build and Fly
09-21-2009, 11:31 AM
#8651
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RE: Extreme Flight 88
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted "sag" is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun! 
Oh, and what a difference that extra 1" in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Oh, and what a difference that extra 1" in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
09-21-2009, 11:41 AM
#8652
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RE: Extreme Flight 88
ORIGINAL: ArcherIIDriver
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
09-21-2009, 11:47 AM
#8653
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RE: Extreme Flight 88
ORIGINAL: EAGLE PILOT
I don't have much time on the DL yet, but my initial impression is very good! The Brillelli is a good engine, but more sensitive to carb adjustments. slight needle adjustments had noticable effects on idle, transition, etc. Maybe that is the nature of piston port indution vs. reed induction on the DL. They both turned 7600 rpm w/ the tuned pipe on the first tank, but the DL was smoother (transition) operating on the first couple of flights. (the B-60 flamed out 3 out of my first 5 flights[:@]) I am able to set a reasonable idle rpm with the DL and have confidence that it won't flame out doing a wall or a blender 
And on top of all that I shaved 7oz off the AUW. Now all I need to do is go burn some gas!
ORIGINAL: AirWizard
Eagle Pilot,
Would you recommend the DL over the B60 for this plane?
Eagle Pilot,
Would you recommend the DL over the B60 for this plane?
And on top of all that I shaved 7oz off the AUW. Now all I need to do is go burn some gas!
The Brillelli's can be touchy on the needles. I've had two of them develop a leak on the case. When that happens it seems like you can't get a happy tune out of them.
Did yours have the HDA-48 (t needle) or the WT 201B (same as DA 50) carb? The later motors came with the WT carb with a smaller bore and the transition is better.
09-21-2009, 12:20 PM
#8655
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RE: Extreme Flight 88
ORIGINAL: cjcyclesrc
The Brillelli's can be touchy on the needles. I've had two of them develop a leak on the case. When that happens it seems like you can't get a happy tune out of them.
Did yours have the HDA-48 (t needle) or the WT 201B (same as DA 50) carb? The later motors came with the WT carb with a smaller bore and the transition is better.
ORIGINAL: EAGLE PILOT
I don't have much time on the DL yet, but my initial impression is very good! The Brillelli is a good engine, but more sensitive to carb adjustments. slight needle adjustments had noticable effects on idle, transition, etc. Maybe that is the nature of piston port indution vs. reed induction on the DL. They both turned 7600 rpm w/ the tuned pipe on the first tank, but the DL was smoother (transition) operating on the first couple of flights. (the B-60 flamed out 3 out of my first 5 flights[:@]) I am able to set a reasonable idle rpm with the DL and have confidence that it won't flame out doing a wall or a blender And on top of all that I shaved 7oz off the AUW. Now all I need to do is go burn some gas!
ORIGINAL: AirWizard
Eagle Pilot,
Would you recommend the DL over the B60 for this plane?
Eagle Pilot,
Would you recommend the DL over the B60 for this plane?
And on top of all that I shaved 7oz off the AUW. Now all I need to do is go burn some gas!
The Brillelli's can be touchy on the needles. I've had two of them develop a leak on the case. When that happens it seems like you can't get a happy tune out of them.
Did yours have the HDA-48 (t needle) or the WT 201B (same as DA 50) carb? The later motors came with the WT carb with a smaller bore and the transition is better.
I had four more successful flights on my new DL-55 powered EF Yak yesterday. That Vess 23A has to be spinning around 8K in level flight WOT [X(](in short bursts of course) It wasn't that loud with the B-60! The prop tips are definitely going supersonic! Two more gals and I will install the larger prop. I have the HDA-48 on my B-60 with the "T" needle and yes I agree, a 1/16th to an 1/8th turn on the low needle would make a big difference in transition!
09-21-2009, 02:11 PM
#8656
RE: Extreme Flight 88
ORIGINAL: ArcherIIDriver
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Glad to hear all ya'll having fun with your Yaks. I still say of all the cool things this plane can do, why is landing one of the most fun? It's just the coolest looking approach I've even seen.
09-21-2009, 02:21 PM
#8657
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RE: Extreme Flight 88
ORIGINAL: JoeAirPort
Wow that's great. I would have never guessed that would do so much for you. Cool.
Glad to hear all ya'll having fun with your Yaks. I still say of all the cool things this plane can do, why is landing one of the most fun? It's just the coolest looking approach I've even seen.
ORIGINAL: ArcherIIDriver
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Glad to hear all ya'll having fun with your Yaks. I still say of all the cool things this plane can do, why is landing one of the most fun? It's just the coolest looking approach I've even seen.
One day I'd love to try the Extra for comparison. For now I'm ordering the 48"EXP for my throw into the back of the Cherokee and go to the local park or going to the club field later in the day for a few flights just to get my fix during the week!
09-21-2009, 05:40 PM
#8658
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RE: Extreme Flight 88
ORIGINAL: ArcherIIDriver
Definitely
ORIGINAL: cjcyclesrc
That's great news. We should still get together and fly.
That's great news. We should still get together and fly.
>>>>
09-21-2009, 07:23 PM
#8659
RE: Extreme Flight 88
ORIGINAL: xtraflyr
IDK there is something about having the idle perfect coming in on final.and just touching a little up to flair or pulling harder and landing tailwheel first and those springy mains touching down taking all the abuse and the airframe just going smooth as ever.
One day I'd love to try the Extra for comparison. For now I'm ordering the 48''EXP for my throw into the back of the Cherokee and go to the local park or going to the club field later in the day for a few flights just to get my fix during the week!
ORIGINAL: JoeAirPort
Wow that's great. I would have never guessed that would do so much for you. Cool.
Glad to hear all ya'll having fun with your Yaks. I still say of all the cool things this plane can do, why is landing one of the most fun? It's just the coolest looking approach I've even seen.
ORIGINAL: ArcherIIDriver
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Well, I changed out the Vess 22A for a 23A, re-tuned a bit, and viola! the inverted ''sag'' is almost completely gone. It would actually fly the length of the field while inverted! A couple more tanks to prove that it's fixed, and I can start having fun!
Oh, and what a difference that extra 1'' in prop diameter makes in flight performance too. Really helps to slow the down lines. Plus, my landings have instantly gone from scary/bouncy to smooth as silk. I think that minor prop change is exactly what I needed. Sometimes, it is the simplest things...
Glad to hear all ya'll having fun with your Yaks. I still say of all the cool things this plane can do, why is landing one of the most fun? It's just the coolest looking approach I've even seen.
One day I'd love to try the Extra for comparison. For now I'm ordering the 48''EXP for my throw into the back of the Cherokee and go to the local park or going to the club field later in the day for a few flights just to get my fix during the week!
The Extra flies different than the Yak but every bit as good. I can't make up my mind which one I like better. I keep changing my mind. Maybe I should just fly them and shutup !!
09-28-2009, 09:57 PM
#8660
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RE: Extreme Flight 88
Hi all,
I've been flying my 88" Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88" Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
I've been flying my 88" Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88" Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
09-28-2009, 10:18 PM
#8661
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RE: Extreme Flight 88
ORIGINAL: MMcKelvey
Hi all,
I've been flying my 88'' Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88'' Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
Hi all,
I've been flying my 88'' Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88'' Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
09-28-2009, 10:45 PM
#8662
RE: Extreme Flight 88
Since the servo power is routed through the rx you can't do it at 7.4V. You'd still need to regulate it. There might be some power expander that can give the rx one voltage and the servos another but I'm not an expert on all the features. Contact Smart Fly, he might have something for you.
Aren't there any Futaba rx's that can handle more than 6V? My Spectrum receivers do 9.6V or something like that.
Aren't there any Futaba rx's that can handle more than 6V? My Spectrum receivers do 9.6V or something like that.
09-29-2009, 07:51 PM
#8664
Member
RE: Extreme Flight 88
ORIGINAL: MMcKelvey
Hi all,
I've been flying my 88'' Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88'' Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
Hi all,
I've been flying my 88'' Extreme Flight Yak all year and the plane is awesome! It's currently running on Duralite lithium ion regulated at 6 volts to Hitec 7955 servos. I'm about to start building the 88'' Extreme Flight Extra for a friend and he bought the new Hitec 7950 th high voltage servos. I'm looking for ideas on how and with what to power those servos at 7.4 volts and the Futaba Rx at 6 volts (I'd like to stay with Duralite batteries). Any thoughts or suggestions on how to properly manage that would be great.
Thanks,
Mike
Jim
09-30-2009, 01:49 PM
#8665
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RE: Extreme Flight 88
I have always used the Vess props on my extra and yak. I preferred the B instead of the A. I liked the the increased thrust the B gives -vrs- the higher rpm of the A.
Recently on a Decathlon build I was trying to find the right prop combo for it. Was working with some of the cheaper props till find the right size and pitch. Well I tried out one of the Xoar
laminated props on it. Wow the thrust from it was outstanding.
So I got one for my extra (DA50r) to try. Replaced the 23B with the xoar 22x10. Wow! a very noticeable thrust increase. Now using xoar lam 22x10 on yak and extra. Xoar claims the Lams are stiffer than the Beach wood and more
closely resembles the performance of carbon props.
Might want to try them out there very cost effective for the performance.
Also I keep looking at those Xoar carbon tip props. Does anybody have some experience with them?
Recently on a Decathlon build I was trying to find the right prop combo for it. Was working with some of the cheaper props till find the right size and pitch. Well I tried out one of the Xoar
laminated props on it. Wow the thrust from it was outstanding.
So I got one for my extra (DA50r) to try. Replaced the 23B with the xoar 22x10. Wow! a very noticeable thrust increase. Now using xoar lam 22x10 on yak and extra. Xoar claims the Lams are stiffer than the Beach wood and more
closely resembles the performance of carbon props.
Might want to try them out there very cost effective for the performance.
Also I keep looking at those Xoar carbon tip props. Does anybody have some experience with them?
10-05-2009, 05:13 PM
#8667
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RE: Extreme Flight 88
The scheme looks a little different on the tail now.
I've now got servo's, SWB Arms, RX, Batteries, Brillelli 60, Props, etc. just need the airframe now.
I'm looking forward to having another 88" Yak.
I've now got servo's, SWB Arms, RX, Batteries, Brillelli 60, Props, etc. just need the airframe now.
I'm looking forward to having another 88" Yak.
10-08-2009, 04:53 PM
#8671
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RE: Extreme Flight 88
Hi guys, i am assembling my russian thunder 88", just want to know where most people are setting their c.g for a blend of imac and 3D?
it must have been covered already but this is one long thread!
it must have been covered already but this is one long thread!
10-08-2009, 05:38 PM
#8672
RE: Extreme Flight 88
It's a tail heavy kit IMO (big fat scale fuse). Put all you stuff as far forward as possible. Batt's on engine box. Tell me what your setup is as far as engine, exhaust, spinner type, prop. That determines a lot about how your CG ends up. I don't know of anyone who could get the CG too forward. Usually we just push it all up front as much as possible.
Mine is around 7 1/4" I think. It's further back than I'd like but I didn't feel like putting the batts on the engine box. I may do this in the future and try it out though.
Mine is around 7 1/4" I think. It's further back than I'd like but I didn't feel like putting the batts on the engine box. I may do this in the future and try it out though.
10-08-2009, 05:49 PM
#8673
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RE: Extreme Flight 88
well it gotta DLE-55 going in it, with MTW headers and RE-2 pipe. no wheel spats etc. no power expanders etc. kepping it simple. fuji water bottle for the tank. x2 A123 2400mah batts on separate switches for redundancy althought i'm thinking i might just run x1 batt.
I also run the ignition off the same batt (through a regulator!)
No pilot figures or such. Hitec all around
I also run the ignition off the same batt (through a regulator!)
No pilot figures or such. Hitec all around
10-08-2009, 06:03 PM
#8674
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RE: Extreme Flight 88
ORIGINAL: salerno
well it gotta DLE-55 going in it, with MTW headers and RE-2 pipe. no wheel spats etc. no power expanders etc. kepping it simple. fuji water bottle for the tank. x2 A123 2400mah batts on separate switches for redundancy althought i'm thinking i might just run x1 batt.
I also run the ignition off the same batt (through a regulator!)
No pilot figures or such. Hitec all around
well it gotta DLE-55 going in it, with MTW headers and RE-2 pipe. no wheel spats etc. no power expanders etc. kepping it simple. fuji water bottle for the tank. x2 A123 2400mah batts on separate switches for redundancy althought i'm thinking i might just run x1 batt.
I also run the ignition off the same batt (through a regulator!)
No pilot figures or such. Hitec all around
10-08-2009, 06:29 PM
#8675
RE: Extreme Flight 88
Yeah you'll need the batt's on the engine box for sure. You didn't say what prop and spinner. Those add weight and they are on the most forward point of the plane. With a light prop and no spinner it can make it tail heavy. You might want an aluminum spinner instead of a carbon fiber one with the pipe. The pipe makes it tail heavy.