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RE: Larger Revolver - 11/22/2012 11:38 PM   
SigMan



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Status: offline 		what are a good size of Hitec Analog servos for the Revovler 72" ? anyone.

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RE: Larger Revolver - 11/22/2012 11:41 PM   
microdon2


 

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Status: offline 		Granpooba - don't tell me you don't fly in the winter... You just need some skis and a Raydiowarm (or equivalent) - flying off and landing on snow is a blast!


(plus no crowds at the field...)

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RE: Larger Revolver - 11/23/2012 12:00 AM   
mike early



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quote:

ORIGINAL: SigMan


quote:

ORIGINAL: mike early

Tell me you got a new Saito, SigMan!

Actually Mike im trying out an XYZ 20cc gas engine on it. my first gas engine.


Saito has lots of nice gasoline engines now. There was some hiccups at first, but they've got it figured out, and how.

Now they are releasing the radials in gasoline...not that I can afford them, or anything.

But..when I do finally change over to gasoline, for sure it'll be with Saitos. Don't you remember how great they sounded, Saito Member Numero Uno?

I feel obligated to bring you back into the fold, man.

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RE: Larger Revolver - 11/23/2012 12:07 AM   
SigMan



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Status: offline 		oh i remember how good the Saito's Sound but to spend that kind of moolah on my first gasser would be re-dic.

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RE: Larger Revolver - 11/23/2012 12:45 AM   
ShuttleAU


 

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Clipped a tree coming in to land. The strip is surrounded by scrub and one end has some tall trees. Clipped one with the left wing and the Revolver dropped to the ground where the right wing hit a boulder. The wing tube shattered. You can see the end of the wing tube and the wing dent in one photo. The engine , servos etc are OK.

I now have a new kit and a tail/rudder to nail to the shed wall with a few others.

BC

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RE: Larger Revolver - 11/23/2012 1:23 AM   
ahicks


 

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quote:

ORIGINAL: SigMan

what are a good size of Hitec Analog servos for the Revovler 72'' ? anyone.


Analog fan here too. One of the more popular servos in 20 and 30cc planes today, analog for low power consumption, and metal gears to handle the vibration and loads imposed by a gasser:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXUZ89&P=ML

There are less expensive options that are pretty popular though. This one pretty impressive, lots of guys having pretty good luck with them, has metal gears, is analog, and incredible torque!

http://www.troybuiltmodels.com/items/HD-1501MG.html



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RE: Larger Revolver - 11/23/2012 1:38 AM   
ahicks


 

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ORIGINAL: Granpooba

quote:

ORIGINAL: ahicks

You still don't have that thing in the air? I thought I was slow...
I have no brand loyalty, not scared of any of the 20's I'm familiar with. My thought is any of them will probably outlast me with proper care care and feeding. That thought in mind, suggest you find and go with the lightest available? You've been around for a while, so thinking you might want to consider moving the CG back about 1/2'' from suggested once you start settling in after the test flights. That lighter engine will be a big help doing that? Not knowing this ahead of time, I used an RCG which is about 3oz heavier than the DLE. To get the CG where I wanted it, I even had to go to a plastic spinner? FWIW, -Al


People aren't slow. Just have lots of time on their hands and way to many other models to fly. Finish one, then whats next ? Besides, perfection takes time.

Also its getting cold here in upstate NY. Thinking about changing hobbies over to snowblowing and skiing.


I hear that. We have a second home in Mi's northern lower (Gaylord). Do a lot of snowmobiling. 150" of snow on average annually in this snow belt area. Our snow blowing there is done with a 7' blower on the back of a tractor/loader! 600' of driveway....

STILL, there are a few days when we're down state that are clear and not too windy. We go out to the field and get a flight or 2 in when that happens, no matter the temp?

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RE: Larger Revolver - 11/23/2012 4:33 AM   
jet22b


 

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Sorry to see the pictures of your Large Revolver!! When they die, they go out in a bang. Get back in the air soon!! Is your engine okay??
Sonny
aka
jet22b

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RE: Larger Revolver - 11/23/2012 1:33 PM   
SigMan



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quote:

ORIGINAL: ahicks


quote:

ORIGINAL: SigMan

what are a good size of Hitec Analog servos for the Revovler 72'' ? anyone.


Analog fan here too. One of the more popular servos in 20 and 30cc planes today, analog for low power consumption, and metal gears to handle the vibration and loads imposed by a gasser:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXUZ89&P=ML

There are less expensive options that are pretty popular though. This one pretty impressive, lots of guys having pretty good luck with them, has metal gears, is analog, and incredible torque!

http://www.troybuiltmodels.com/items/HD-1501MG.html



wow, 13 bucks for a metal gear servo. sounds great but worries me a bit. the Rev 70 manual says "REQUIRES: Five 50 oz.-in. (3.6 kg-cm) minimum standard torque" the HD's didnt say what kind of torque the have and the video didnt help either.


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RE: Larger Revolver - 11/23/2012 1:42 PM   
ahicks


 

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Status: online 		Follow the troybuilt link, then click on the "specs." tab (default is "overview"). You'll see: "Stall Torque: 215oz-in. at 4.8v, 236 oz-in. at 6.0v" and that's not a misprint. With that kind of torque, they should handle most minimum requirements?

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RE: Larger Revolver - 11/23/2012 2:36 PM   
microdon2


 

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Status: offline 		The specs \ price combo on this Power HD 1501 servo are impressive, and more than enough for the Rev 70 - even the Rev 90. The issue is what are we getting for this price? If it sounds too good to be true... On the other hand, at this price it still may be worth buying them and adding a spare or two.

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RE: Larger Revolver - 11/23/2012 2:53 PM   
microdon2


 

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Status: offline 		ShuttleAU - sorry to hear about your crash. That must have hurt. The good news - looks like the tail feathers, wings and cowl are in good shape. With some minor fixing to the wings you only need a new fuse \ canopy to rebuild. (just have to use a channellock \ plyers to break the tail fuse away from the horizontal and vertical stabilizers).

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RE: Larger Revolver - 11/23/2012 2:58 PM   
Granpooba


 

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quote:

ORIGINAL: ShuttleAU

Hi All

Clipped a tree coming in to land. The strip is surrounded by scrub and one end has some tall trees. Clipped one with the left wing and the Revolver dropped to the ground where the right wing hit a boulder. The wing tube shattered. You can see the end of the wing tube and the wing dent in one photo. The engine , servos etc are OK.

I now have a new kit and a tail/rudder to nail to the shed wall with a few others.

BC


Well, at least you know what model it was, by the name on it.

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RE: Larger Revolver - 11/23/2012 3:00 PM   
Granpooba


 

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Status: offline 		Still have not heard any comments about installing a OS GT 22 in an R-70.

Come on fellows, somebody must have some thoughts on it !

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RE: Larger Revolver - 11/23/2012 4:04 PM   
ahicks


 

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ORIGINAL: microdon2

The specs \ price combo on this Power HD 1501 servo are impressive, and more than enough for the Rev 70 - even the Rev 90. The issue is what are we getting for this price? If it sounds too good to be true... On the other hand, at this price it still may be worth buying them and adding a spare or two.



I don't think many will argue the Hitecs are a great choice - BUT - if you've an open mind on the subject, after some research you might agree there are alternatives that seem to be working pretty well too? Troy Built themselves are endorsing this 1501 servo - without endorsing the entire Power HD line up?

Another example might be a while back I caught wind of a metal gear servo that a few guys were using (http://www.hobbyking.com/hobbyking/store/__2__HXT_10kg_Servo_metal_gear_55g_10kg_16sec.html) that's even less money (7.98?). I decided to roll the dice on them (yes I bought an extra one too!), and have now been using (beating on) them for a couple of seasons now in a gas powered profile, without issue! These servos have been through some serious hell. 3 major crashes, and who knows how many "incidents"? Not one stripped gear! Not endorsing them or trying to start a war here, I'm just not that into it. Just sharing something I'm seeing, and the fact these no longer strikes me as something "too good to be true?". All that said, I should mention I'm a sport flyer with no desire to have/need the best available. Functional and durable would be my biggest things....

Going back a few years, this isn't a lot different from the days that had us believing that if it wasn't an O.S. engine (or whatever your favorite was at the time) it was junk. Not worth owning. Then more recently, along comes China with the DLE, RCG, XYZ, and the rest of the alphabet parade with all the new gas power. Yes, there were some duds mixed in with them, but they generally aren't around long. Look what these have done to the cost/interest in radio control, the numbers of guys coming back for another round? That's the same way I'm looking at these servos. They're cheap, and they work. That's good enough for me... FWIW, -Al

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RE: Larger Revolver - 11/23/2012 4:10 PM   
microdon2


 

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Status: offline 		ahicks -

I'm with you - with my limited RC budget I'm always looking for deal, especially buying used planes and engines. And I'm not a precision or 3D flyer (not yet, anyway). So I don't need the top of the line servos. And I do like that TBM is selling these - that indicates at least some level of confidence in the product. And thanks for the link to the HK servos and your good experience with them - that's worth something.

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RE: Larger Revolver - 11/23/2012 4:40 PM   
SigMan



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Status: offline 		think i have decided on these. great price plus digitals http://www.troybuiltmodels.com/items/HD-8309TG.html

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RE: Larger Revolver - 11/23/2012 5:29 PM   
wjcalhoun


 

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Status: offline 		No experience with that particular Power HD servo model, and as ahicks implies, there is considerable variability with this brand. i can state from my own personal experience to stay away from the DS-120M. Had them on my first R70 and had 3 of 5 fail within 12 flights.

My foray away from the Hitecs, and I still use Hitecs mostly (7954SH in my R90 and AWExtra300), has been to the Savox line. Torque as good as or better than comparable hitecs, and speed quite a bit better - 2/3 of the time end-to-end of an equivalent hitec (Savox 1256TG vs Hitec 7954SH). Generally about $10-15 less. What one gives up is programmability with the hitecs for centering, speed, etc.

I have Savox 1256TGs on the elevators of my PHP Extra 260 and they have been rock-solid reliable. YMMV of course.

There will always be debate over the digital / analog signal processing. I have gone entirely to digitals for better holding power, but they are a bit more expensive, use more current during flight, and may buzz when at rest on the ground. To each his or her own.

I think the only hard and uncontroversial recommendation for the R70 is that they have a metal gear train and adequate strength. Look up a required torque calculator for control surfaces - there are several on the web - and you will find that the R70 torque recommendations are just about adequate for slow (<50mph) flying with book rates on the control surfaces. Most of us fly 1) faster, and 2) with more rates on the surfaces than 'recommended'. It is remarkable how quickly torque requirements rise with increases in deflection angle and speed. Also, i really never want my servo to be putting out 100% of its torque; i aim for a safety margin of 25-30%. A bit more torque is relatively inexpensive.

If you are thinking about the 150 in-oz class servo, you might consider hitec 5685 - about $46, or the savox 0252 at about $38.

For my R70, 180 in-oz would be a minimum.



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RE: Larger Revolver - 11/23/2012 5:45 PM   
microdon2


 

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Status: offline 		wjc - good to see your as-usual informed weigh-in. btw - I've been working on my flat-spin lately and I'm getting it, but have to admit it's a little scary finding two toggle switches to come out of high rates while still at a safe height. Pretty sure you said you had all high rates tied in to one toggle - is that right? I'm going to look into doing that. Before I was trying it with high rates on just rudder and elevator, but going to high on the ailerons made the difference. It's a pretty manuever when it works. I also like the "washing machine" (I think that's the name - when you climb high, cut throttle, nose down, and do a roll straight down - and high rates really makes that come alive.

< Message edited by microdon2 -- 11/28/2012 8:11 PM >

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RE: Larger Revolver - 11/23/2012 9:21 PM   
lopflyers


 

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quote:

ORIGINAL: ShuttleAU

Hi All

Clipped a tree coming in to land. The strip is surrounded by scrub and one end has some tall trees. Clipped one with the left wing and the Revolver dropped to the ground where the right wing hit a boulder. The wing tube shattered. You can see the end of the wing tube and the wing dent in one photo. The engine , servos etc are OK.

I now have a new kit and a tail/rudder to nail to the shed wall with a few others.

BC


Sorry to see tris pictures, but nos I know why you crashed, you have an angry bird as a pilot



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RE: Larger Revolver - 11/24/2012 12:53 AM   
wjcalhoun


 

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Status: offline 		Hi Mike
Thanks for the nod. Hope your thanksgiving was great.
You are correct - i have all my rates on one master switch, so i can pull to low rates with a single switch.
When you are in the 'washing machine' pull the rudder opposite to the aileron roll, and you will transition into a blender. Very impressive.
I do love the upright flat spin. A very pretty maneuver.

The R90 is coming along. I'll post some comments and pics in the appropriate thread.

Bill


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RE: Larger Revolver - 11/28/2012 6:08 PM   
Ernie Misner



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Status: offline 		Where to look at and purchase the Savox servos? Al, the kHD-1501's do look great for $14... ! Thanks so much for the links. Whatever servos I decide on will be going on a 20cc profile plane I think. I already have some Hitec 645's that I bought 2 years ago and will use on the first 20cc plane. It's amazing how fast progress is made these days and the 645's look a bit dated already. Has anyone had experience with these older analog servos?

Ernie

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RE: Larger Revolver - 11/28/2012 6:35 PM   
ahicks


 

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Status: online 		I'm running 6 of them in my 4 year old 14lb. Syssa powered Giant Sportster, and 4 more (ailerons/elevators) in a 13.5 lb. DLE 30 powered 80" Katana? Pretty popular servo. Lots of them around... but as pointed out there are others that provide the same function for half that price.

My 20cc profile has now been run through a tree after a rather stupid mistake the other day. That's the 4th major crash on these things. The 8.00 Hextronic servos appear to have survived this crash as well? Not sure if I'm going to rebuild it at this point, but if not, those same servos will be going into their 3rd airframe without hesitation! Would do the same with the 645's... -Al

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RE: Larger Revolver - 11/28/2012 7:28 PM   
wjcalhoun


 

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I found a nice selection of Savox at AMain hobbies. There may be other places as well.
Savox seem to be quality servos, at perhaps 10-15% less than Hitec. They are not bargain basement by any means.
Bill


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RE: Larger Revolver - 11/28/2012 8:15 PM   
microdon2


 

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Status: offline 		ahicks - you crashing your 20cc Profile sounds like me and my Rev59's - I keep crashing then and re-building them. One of these days I'll know what the heck I'm doing...


wjc - thanks for the blender tip - I'm gonna try that.

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