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RE: Larger Revolver - 2/3/2013 1:43 PM   
wjcalhoun


 

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A 15 (dia) x 13 (pitch) prop is way too much prop for an AX 1.20. That may be why you aren't getting the rpm.
With 15" dia props, you are probably going to want to limit pitch to 9. The DLE 20 although nominally the same displacement, seems to swing slightly more prop, but with less rpm. The AX should peak 92-9500. The DLE20 will peak at 88-8900, both on the ground measurements, with unloading in the air.

I have measured 9450 rpm in the air (at 118.5mph) with my DLE20 using the Eagletree flight data recorder. I would guess that the AX 1.20 would turn several hundred rpm faster than that when unloaded.

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RE: Larger Revolver - 2/3/2013 7:26 PM   
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Status: offline 		Just back from flying the Rev 70 \ OS 120 in the snow. Just re-gapped the lifters and it's running much better now. Perfect conditions for lower NY this time of year - 28 def F and 7mph NE wind. Even had cloud cover to block the sun. Actually, there's only 1" of snow on the ground, but the skis worked! (one DID get tripped up on a rock once). First time on skis this season - LOVE it! When that ski got tripped up by a rock (on beginning of take-off) the plane nosed-in and broke a tip of the APC 15x10 (if the prop and the ground weren't both frozen it probably would have survived - HATE losing a good prop). Fortunately I now bring spares - put an APC 15x12 and it still flew great. Maybe didn't hit as high RPM's (hard to tell), but the plane moved briskly. Was using my Raydiowarm, as always. Two heli guys also showed up, but quite after three flights cause their hands were too cold (no Raydiowarms).

So got in about 8 good flights - a good morning's flying. Am thinking again about the Rev 90. As much fun as the Rev 70 is.... For now I'm hoping for more snow.

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RE: Larger Revolver - 2/3/2013 8:28 PM   
ICEM@N


 

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Status: offline 		so Wjcajoun , first I tried a 16x8 and was no rpms... a 15x13 is a prop that I have here but did not try it already ( and will not ) so what prop I need to buy to get high rpm´s with the OS 120 AX ? And buy the way this 15x13 could be used in a P-51 20cc engine with high rpm´s ??

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RE: Larger Revolver - 2/3/2013 9:28 PM   
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quote:

ORIGINAL: ICEM@N

so Wjcajoun , first I tried a 16x8 and was no rpms... a 15x13 is a prop that I have here but did not try it already ( and will not ) so what prop I need to buy to get high rpm´s with the OS 120 AX ? And buy the way this 15x13 could be used in a P-51 20cc engine with high rpm´s ??


Check out this link for what the guys are using for props on the O.S. 1.20AX.

http://www.rcuniverse.com/forum/m_3998256/mpage_1/key_/tm.htm

Joe M.


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RE: Larger Revolver - 2/4/2013 3:58 AM   
wjcalhoun


 

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You say you have no rpms; what are you getting? do you have a tach?
I think most of us with AX 1.20 2 strokes got every bit of 8800 with a 16x8 APC prop. If you cant get close to that, the needles are probably incorrect.
Other OS AX 1.20 2-stroke owners, chime in here.

Bill


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RE: Larger Revolver - 2/4/2013 4:08 PM   
ICEM@N


 

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Status: offline 		I will read rpm´s .... the prop I was using is a wood Xoar 16x8 .... and I will try and APC 15x10 !!

thanks my friend


... need to freeze ...

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RE: Larger Revolver - 2/4/2013 9:07 PM   
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Status: offline 		In the never ending saga of getting replacement wings for the Revolver 70", see my previous posts, I wrote to Hobbico/GP last week.... Today I got this in my mailbox:  (will the madness ever end?) lol...  I am working the original wingset as I have a feeling this is going to take a loooonnnngggg time.




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RE: Larger Revolver - 2/4/2013 10:45 PM   
Luchnia


 

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quote:

ORIGINAL: VictoryRoll

In the never ending saga of getting replacement wings for the Revolver 70'', see my previous posts, I wrote to Hobbico/GP last week.... Today I got this in my mailbox:  (will the madness ever end?) lol...  I am working the original wingset as I have a feeling this is going to take a loooonnnngggg time.





I am still waiting for my wings to come in. The lady called and verified the address and said she was shipping them so I will wait and see what I get.

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RE: Larger Revolver - 2/5/2013 12:24 AM   
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Status: offline 		Wow - all the main parts on the Rev 70 are on back-order until MAY! (and, from what I've seen of TH lately with parts that might be July or August). Could be they had a rush on spare Rev 70 parts due to their recent lack of QC? I'd but my left aileron there's an interesting story behind all this....

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RE: Larger Revolver - 2/5/2013 1:51 AM   
ICEM@N


 

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Status: offline 		WJCalhoun , could be a 15x8 wood Xoar ?

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RE: Larger Revolver - 2/5/2013 1:53 AM   
wjcalhoun


 

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15x8 Xoar should be a nice prop; not overloaded, so the engine should spool up well. What RPM are you getting with it?


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RE: Larger Revolver - 2/5/2013 2:49 AM   
ICEM@N


 

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Status: offline 		I just tested the Xoar 16x8 .... now , I just bought a APC 15x8 , and will test it on weekend !!! And ... at friday here starts Carnaval ... so I will samba with my Rev70 and the APC 15x8 !!! 5 days flying !!! I hate samba !!

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RE: Larger Revolver - 2/5/2013 3:30 AM   
capt1597


 

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quote:

ORIGINAL: ICEM@N

APC 15x8 !!! 5 days flying !!! I hate samba !!



the outfits look pretty good in the pictures! of course we have snow on the ground here.

was just winter charging my 70' it was my most flown plane last season and i can report that it did not miss a beat. it is in as good condition as when last year started. still using the os 91 fx with a 14x8 vess prop. it's a keeper!

happy flying, capt

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RE: Larger Revolver - 2/5/2013 12:04 PM   
orthobird


 

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Status: offline 		seems this thread is deteriorating and becoming a bashing of the beloved plane we all love.  but it is a shame they have sold us this plane with all these problems.  i bet if i go to my garage and do the wing measurements of servo bay to root, they will probably be off too.  it is just that most of us did not take note of this.  anyone dare me to go and see.
i flew her again on Sunday and she is a beauty.  I got her tuned better now, and when i do inverted flight, she needs very little down elevator to keep her straight.  doing rudder turns also is fun.  her flying capabilities are great, and she rolls awesome.


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RE: Larger Revolver - 2/5/2013 1:37 PM   
Luchnia


 

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quote:

ORIGINAL: orthobird

seems this thread is deteriorating and becoming a bashing of the beloved plane we all love.  but it is a shame they have sold us this plane with all these problems.  i bet if i go to my garage and do the wing measurements of servo bay to root, they will probably be off too.  it is just that most of us did not take note of this.  anyone dare me to go and see.
i flew her again on Sunday and she is a beauty.  I got her tuned better now, and when i do inverted flight, she needs very little down elevator to keep her straight.  doing rudder turns also is fun.  her flying capabilities are great, and she rolls awesome.



I think the problem is that some servo bays are way off. Being off a small amount and still getting the horn to fit the reinforcement block is no big deal and no one would probably care at all. My first Rev 70 was off. I know I don't care if an aileron servo bay is off, but I don't want it off so far is is not manageable.

I don't think any of us are really bashing the Rev 70, but stating facts about our experiences so that others are forewarned and make sure they get what they paid for. We certainly want to make GP aware and give them a chance to get the problems sorted out. Happy flying!

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RE: Larger Revolver - 2/5/2013 3:05 PM   
RoyR


 

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quote:

ORIGINAL: orthobird

seems this thread is deteriorating and becoming a bashing of the beloved plane we all love.  but it is a shame they have sold us this plane with all these problems.  i bet if i go to my garage and do the wing measurements of servo bay to root, they will probably be off too.  it is just that most of us did not take note of this.  anyone dare me to go and see.
i flew her again on Sunday and she is a beauty.  I got her tuned better now, and when i do inverted flight, she needs very little down elevator to keep her straight.  doing rudder turns also is fun.  her flying capabilities are great, and she rolls awesome.




I disagree that this is becoming a bashing of the plane. It is informing people that there is a problem with the quality of the kit. No one is saying anything bad about the airplane in general. In fact everyone has been straight forward and giving compliments to the service department for being so quick to respond and try to make things right, plus everyone who has the Revolver flying seems pleased with the performance.
As for the servo cutout, I noticed the problem when my linkage did NOT align with the aileron support. No nit picking there. It either fits or it doesn't The second set of wings were the same. I had to modify my linkage to make it fit.
To receive an obviously faulty kit and just say, 'Oh, that's OK, it's no big deal.' is cheating the next generation of Revolver buyers, as nothing will be corrected if no one says anything. Also, who would have thought your landing gear would just pop off on a soft landing when you try to turn? Reading it here I was forewarned. Plus I can Honestly say the first set of wings had more wrinkles than ANY ARF I have Ever bought at any price. The second set was not that bad, but close, and the wrinkles keep returning.
To me if the wings are on back order, that is a good deal for the future. It means people are noticing the construction is inferior, and demanding it be made good. If there had not been a problem there would not be a shortage.

So there is a big difference between: "bashing" something because you don't like the way it looks or the way it flies or it's something you personally disapprove of, and stating an obvious problem that affects everyone.

and instead of this thread deteriorating, it will probably result in getting a better quality kit out of Great Planes.


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RE: Larger Revolver - 2/5/2013 3:22 PM   
RoyR


 

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Status: offline 		And on another note:
I mentioned I have put electric in mine. I am also new with electrics. After playing with props I have one that really makes the Revolver scoot. (I use a 17X10 on an EMP 5065 motor) I can also start a vertical climb at half throttle and when I add full power it accelerates as it climbs straight up.
I still don’t know what is up with the throws. I am flying with full rates, as given in the instructions, and have no problem with over controlling. Low rates are mushy even at high speed.
It also will not snap without using aileron. (using only rudder and elevator) Perhaps I can move the CG back a little for that.
But I only have around 5 flights on it, I’m still getting the feel.

Yes, it’s a fun airplane.
I don’t do 3D, many so called “Sport planes” fly more like trainers. The revolver seems to fit the bill for the type flying I like to do.

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RE: Larger Revolver - 2/5/2013 3:54 PM   
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Status: offline 		Roy R - Well said. Completely agree that we're not bashing the Revolver - we're addressing QC issues about a plane we all seem to love. To me that's only a good thing - it shows we care! If anything I think we're all surprized and dissapointed that GP is letting these problems through - but that's because we've come to expect high quality and value with this plane. We don't want to see those deteriorate.

On your snap remark - are you SUPPOSED to be able to to a snap roll without ailerons?

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RE: Larger Revolver - 2/5/2013 5:32 PM   
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Exactly, RoyR....   Since I was the last person to post an issue using a scanned copy of the notice I received on 02/04/13,  I cannot understand that one wouldn't see that NOW others (i.e. new buyers), could/should verify if they have this issue, along with a host of others issues that I and others have previously posted, they now will have a better idea of what could be wrong and what the circumstances are that surround trying to get a wingset that is correct,  Meaning, you'll have a wait.
I do not see this thread leaning towards a GP/Revolver bashing party.  In fact the opposite is true.   We are just trying to notify others with information,   I don't think this is the ONLY thread that has aircraft problems posted and discussed until closure is met.   I know for me, reading this thread forewarned me about the landing gear issue.  It obviously did not stop me from buying the plane, but most importantly, the discussion/posts provided some solutions to the problem.... that is what we are trying to do here as well.   We are simply trying to describe facts, not fiction.  That is certainly important to some of us, at least.   No harm in that.

@Ortho.... Please do post pics of your wingroot to servo bay dimensions... it would be interesting to note if they are different, is there any loss or gain.  If yours are off too, maybe you and another person in this thread (with identical/correct dimensions) could compare notes on the performance in normal flight and aerobatics....????  Anyway, it would be greatly appreciated if you could post the pics and to see your setup.

Thanks to all.

Don




< Message edited by VictoryRoll -- 2/5/2013 6:31 PM >


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RE: Larger Revolver - 2/5/2013 5:34 PM   
RoyR


 

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ORIGINAL: microdon2

Roy R - Well said. Completely agree that we're not bashing the Revolver - we're addressing QC issues about a plane we all seem to love. To me that's only a good thing - it shows we care! If anything I think we're all surprized and dissapointed that GP is letting these problems through - but that's because we've come to expect high quality and value with this plane. We don't want to see those deteriorate.

On your snap remark - are you SUPPOSED to be able to to a snap roll without ailerons?


The first snap roll I ever did was inside a Citabria, back in the 60s when I was in the Army flying with an 'Old Time' stunt pilot. He explained the aerodynamics and a snap roll is rudder and Elevator only. (here is a pretty good description of how it works: http://www.popularmechanics.com/outdoors/sports/physics/how-to-snap-roll-a-stunt-plane)

That's the way standard snaps are done. When I began flying models I found out that many will not snap without aileron assistance. If it is a stable flyer, it won't snap with Rudder and elevator alone. However many of the sport planes will. So I will always try to get them to snap without ailerons first. (I guess being a pilot that's the purist in me) The Revolver is a Sport plane more than aerobatic. It has some built in stability in that there is a slight dihedral in the wings, and the airfoil is semi-semetrical. Others that are scale, like Yaks, Edge, etc. will do a great snap roll without ailerons. OF course when you get into it more than I do, with outside inverted snaps, or whatever, the ailerons help get the desired results.

When I flew for a living everything had to be precise, by the book and within limitations. I guess that's why I like sports flying RCs. When I make a pattern I don't know what I will do next until I get ready to do it. If my snaps end up inverted, or in a knife edge, no one cares except me. The only one I have to please is myself. If I want it perfect, then I will be the one to decide to work on it. If not, I just love boring holes in the sky too.


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RE: Larger Revolver - 2/7/2013 1:28 AM   
orthobird


 

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ORIGINAL: microdon2

Roy R - Well said. Completely agree that we're not bashing the Revolver - we're addressing QC issues about a plane we all seem to love. To me that's only a good thing - it shows we care! If anything I think we're all surprized and dissapointed that GP is letting these problems through - but that's because we've come to expect high quality and value with this plane. We don't want to see those deteriorate.

On your snap remark - are you SUPPOSED to be able to to a snap roll without ailerons?



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RE: Larger Revolver - 2/7/2013 2:06 PM   
Luchnia


 

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Status: offline 		Update on my Rev 70 wings:

I was wondering where my wing blanks were so I emailed GP support and they said that they found a blemish on one of them and rather than send them out they decided to send me a new complete wing set. They sad they had not gotten them out as fast as they would have liked, but the crazy thing is they came yesterday evening. Wow...my hat is off to GP support!

I unboxed the wings and started the "once over" to check everything. I found the servo bays off slightly about 3/8 of an inch, but very well aligned with the reinforcement block, the same measurements from leading edge to trailing edge, and not crooked like some were getting out (like the wings that came with the plane). Even if they were off an inch is not a big deal at all as long as everything lines up.

Next, I checked for wrinkles and these are pristine and not like the ones that came with the plane that were full of wrinkles. Next I checked the alignment pins and they are nicely done and now I should not have to "modify" my new Rev 70 to fit the wings and put the plane together!

The thing is that even if the new wings would have been bad, I know that GP will take care of it. GP certainly has great service and I believe should be noted. Kudos to GP support!



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RE: Larger Revolver - 2/14/2013 6:11 PM   
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Status: offline 		@Orthobird.....   What a great looking plane.    A couple of questions, if you could help me out (others... plz feel free to chime in.... esp. on final weight with your engine size/model)  Greatly appreciate it.

1.   Did you measure the distance from wing root to servo bay (cutout) on both sides for equal dims, by chance?  Is there an offset on yours too?
2.   Seeing your setup (I am guessing a Saito 1.25 4S or so?), what is the final weight?
3.   Which Control armas on the control surfaces did you go with?


Thanks so much in advance.

Don

P.S.  I am awaiting a whole new plane as the wingsets are in delay (I expect they must be fixing tooling/setup).   I will keep you informed when I get her.



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RE: Larger Revolver - 2/15/2013 2:06 PM   
RoyR


 

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Status: offline 		Well, another letter in favor of the customer service.
They have offered to give me credit that I paid to ship the wings back.

The manufacture may be going through a glitch with the Revolvers, but customer service is really trying to make it right.

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RE: Larger Revolver - 2/15/2013 2:15 PM   
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My all up dry weight for my R70 / DLE20 is 9#11oz. I have no issues with her flight performance due to wing loading. I have S/L speed of 109 mph (by GPS) propped at 14x12. My aileron servo bays are within 1/2" of each other, and line up with the reinforcement on the aileron.

I used standard nylon control horns, but as they age and wear, I will replace them with dubro metal horns. The nylon holds up, but obviously with 4-8# of force on the control surface, it flexes. I think metal or rigid phenolic are better choices for this airframe.


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