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HomeAircraftHelicopterGasser Model RC HelicoptersOther › Spectra G ---can anyone give me some pointers on building these...
04-04-2009 05:06 PM  9 years agoPost 21
Dr. Fibinotchi

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Sioux Falls SD

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Irony....
Anthony,

welcome. I see you have a hunger for many types of bird in life. This will not be as fast as you are used to, but pyro flips, and tick tocks are no problem...just a little slower.

Jag72, I highly suggest you buy the carbon Century Predator instead of the Spectra-G. I have compared videos of gasser doing 3D flips and the Spectra-G can't perform flips easily without rotating on its axis. The Predator can do it flawlessly and consecutively without rotating on its axis. The Predator is the better 3D-able machine than the Spectra-G.""

Thanks for the laugh...

-Cody

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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04-05-2009 07:14 AM  9 years agoPost 22
Excalibur

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I have compared videos of gasser doing 3D flips and the Spectra-G can't perform flips easily without rotating on its axis. The Predator can do it flawlessly and consecutively without rotating on its axis. The Predator is the better 3D-able machine than the Spectra-G.
I had to check to see if you posted this on April 1st, because seriously, that would be the only way you could save face on this one.

You based your judgment on two DIFFERENT videos of these machines by two different pilots? You've GOT to be $h!##ing me! I've owned the Predator and the Spectra-G, and when set up properly they perform VERY similarly. Dude, not to flame you, but you really blew this one.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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04-06-2009 12:24 PM  9 years agoPost 23
helikopeter

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stockholm , sweden

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Spectra G Question
Hello there
I am quite new into gassers , and right now I´m in the process of assembling a Spectra G with Zenoah G231puh .
I am trying to install a futaba GV1 governor, but can´t find any place to install the magnets , can anybody give me some tips about it?
I can´t find any info on the manuals.

Thanks a lot

Peter

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04-06-2009 02:20 PM  9 years agoPost 24
Jag72

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South of Boston

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Spectra G
Thanks for all the input guys...I will be building this heli very soon and will make sure to be patient

(That's Something that I am not very good at though...I like Instant Gratification )

I'm guessing 710's is the blade of choice?...what kind of blades fly best on these Gassers?

I am a big fan of the radix...I'm just wondering if these gassers need super stiff blades?

Anthony

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04-06-2009 02:27 PM  9 years agoPost 25
Justin Stuart (RIP)

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Plano, Texas

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http://runryder.com/t478090p1/

Here is the thread for the G270 motor some of us are waiting on. Be aware, Hanson's 5hp is measured with a tuned pipe (which you probably don't want to use).

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04-06-2009 03:11 PM  9 years agoPost 26
Jag72

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South of Boston

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Motor
Well...That looks like the one I will need to get then

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04-06-2009 04:27 PM  9 years agoPost 27
rbort

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Franklin, MA - USA

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You don't need the futaba magnets
am trying to install a futaba GV1 governor, but can´t find any place to install the magnets , can anybody give me some tips about it?
Make a mount out of wood to sit on the bottom plate just like I did and aim the sensor at the crankcase of the motor. Check my gallery for a photo of that. The wood is painted black, its the last picture in the Spectra-g under the hood section.

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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04-07-2009 03:09 AM  9 years agoPost 28
Excalibur

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I'm guessing 710's is the blade of choice?...what kind of blades fly best on these Gassers?

I am a big fan of the radix...I'm just wondering if these gassers need super stiff blades?
I think you'll find that 710mm mains will work very well for the Spectra. I have 710mm RotorTechs on mine and am really impressed with them.

As for stiffness, any carbon fiber blade will be plenty stiff enough for the power from the engine. You CAN use wood if you are just tooling around practicing hovering and fast forward flight, just don't try to stress them with heavy aerobatics or 3D.

For the money, you will find that carbon fiber blades fly smoother, produce more lift, and auto better.

Xcal

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04-07-2009 03:18 AM  9 years agoPost 29
Justin Stuart (RIP)

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Plano, Texas

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I just ordered a set of Mavrikk 710mm G5 blades for my Spectra-G, and I will use the stock plastic t/r blades for now. I am told the Mavrikk blades are all white on the bottom which is good because I like to be able to see the blades.

The engine I am waiting for, the G270, is supposed to put out a lot of torque and Billme recommends 720mm blades with a 6.90:1 gear ratio. However, the largest main/tail blades you can go with on the stock Spectra is 710/105. My gear ratio will be something like 7.08:1 (to allow the use of the Jewel) so I hope the wider chord blades will work well.

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04-07-2009 04:01 AM  9 years agoPost 30
Excalibur

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My gear ratio will be something like 7.08:1 (to allow the use of the Jewel) so I hope the wider chord blades will work well.
You may need to slot the clutch block mounting frame holes to accommodate the different gear ratio. I changed my gear ratio to 6.69 and had to do this. You may also need to slot the holes in the Jewel mounting plate. Not sure what the spacing is.

Xcal

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04-07-2009 04:39 AM  9 years agoPost 31
Justin Stuart (RIP)

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Plano, Texas

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Raja told me that the 92 tooth main gear was actually the same size as the 93 tooth main gear so I could just use the stock Jewel mount. If I go any smaller, however, I will have to make some slits in the CF.

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04-07-2009 04:45 AM  9 years agoPost 32
rbort

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Franklin, MA - USA

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Entirely correct Jrockstuart
When you go smaller GR than 7.08, then you end up having to slot everything to maintain a good gear mesh like Excaliber did.

Personally I was a little concerned about the clearance between the jewel motor case and the swashplate antirotation link as moving things closer narrows that gap.

Excaliber in the only person that I know of that has done this. Excal - did you experience any issues with that or did you modify something to increase the gap back? I forgot what you said when you were working on this...

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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04-07-2009 05:50 AM  9 years agoPost 33
Excalibur

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Excaliber in the only person that I know of that has done this. Excal - did you experience any issues with that or did you modify something to increase the gap back? I forgot what you said when you were working on this...
It was a little tricky. . .

I physically moved the antirotation bracket back about 1/8" and sanded down the side facing the swashplate and washout assembly to give it a little more breathing room. That also required shortening the screw/bearing assembly that's attached to the swashplate and engages the antirotation bracket:

BTW, the clearance looks worse in the photo than it actually is. This mod is not for the faint of heart, but it's not that bad either.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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04-07-2009 02:18 PM  9 years agoPost 34
torenhg

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Orange County, SoCal

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Great discussion,

Figure that the gasser must be like putting 710's on my favorite weedwhacker, and I like my weedwhacker...

Have been watching, thinking, discussing, learning, etc... about gassers myself. have been discussing in thread the build of the Predator and am unhappy with the quality of the manual and the quality control in the factory. It is also somewhat disturbing that for all of the bling, glitz and glitter at the las vegas booth that they couldnt spring a few bucks to provide a supplement for the people in the US that spend likely over $1,500 - $2,200 for their product even without electronics. Also, they should at a minimum, inspect the contents before shipping out, reason being is that at least 2 people on this site very recently have been missing majorly important components that have not been documented in the manual. This concerns me allot as without serious help from people who have learned from their mistakes, people like me would be screwed. It is even more unfortunate that Century after monitoring these posts does not fix it??? or at least create a forum on their own to document a complete build.

As a business person with one of the areas within my team being infactory quality control this behavior is one of a company that does not listen to its customer and thinks that they can get away with anything. IBM thought that years ago and guess what, when was the last time any of you bought an IBM computer??? Bet many of you have Dells or clones. It is also somewhat foolish to think that the heli makes the pilot, and it is quite the opposite. Anyone that believes this is a compliment to the advertising campaign of the manufacturer.

Enough of my soapbox, then I looked at Spectra G, dont know if they are any better but I will be researching them. Downloaded a realflight sim model for the Predator this weekend and liked the feel but was far different from the Bergen that comes with realflight. Unfortunately I have no idea if it is accurate. I does do loops, rolls, and other 3d manuevers better than I thought it would, but again, no idea if this is true performance in realflight. Will be looking for the Spectra G and give it a try.

PS: I am still considering Predator but would like info on the Spectra G which sounds like it is on par with the Predator as far as performance. The motor question intrigues me as I thought the modified g-26 was the most powerful for the gassers. My thoughts on motors goes back to when I purchased a new camero, anniversary addition, they asked if I wanted the V-6 to save a few bucks???? Why would a guy ever buy a muscle car without as much muscle as possible? Go buy a Hyundai if I wanted to save money and/or gas. So I will have to look to more detail into the new engine for these birds.

Go ahead, poke, prod, give me a hard time, but as many say, the gasser should last a lifetime. Means to me that I need to make an informed decision considering all factors of which the build is a blink of the eye for how long these should last.

Century, the cc was out ready to purchase this weekend but after reviewing the current builds on RR threads, I put it back in the wallet to get more information.

350QX
Trex 450
Shuttle ZXX
Fury 55
Spectra G
Furion6
Trex 500

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04-07-2009 02:33 PM  9 years agoPost 35
TaleGunner

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Deer Park WA

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I just finished a new spectra G. the only problem I can say that had anything to do with quality control was the canopy. And to be fair to MA I was told they were out of good canopies and having an Ion X2 I was also aware the MA canopies were not the best.
Is seems a few problems just come with a Gasser as does a steep learning curve. without the guys here mine would still be grounded.
Ether MA or Century your going to like a gasser.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-07-2009 02:44 PM  9 years agoPost 36
Justin Stuart (RIP)

rrMaster

Plano, Texas

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All of the parts in my Spectra kit (arrived in October) have been top notch. I am a little concerned about a few plastic parts which I would have preferred be metal (such as the tail rotor pitch slider arm), but even the plastic parts are real heavy duty. My canopy was bad, but MA told me yesterday they would send me a new one without cost.

I think Miniature Aircraft is a family owned business. Their parts are real expensive, but you're also ordering from Florida rather than Japan/China (as with Century).

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04-07-2009 03:02 PM  9 years agoPost 37
cstoneman

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Colorado

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The Canopy is the only grip I have with my MA #1005 gasser.

Anybody know of any custom canopies that fit it?

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04-07-2009 03:02 PM  9 years agoPost 38
torenhg

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Orange County, SoCal

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thx gunner,

Will have to drive up and give yours a whirl ;-)

Know I will like it regardless of the manufacturer. Am sure I can mange the build and of course, as always, will take the time. Good things take time and effort.

I can see a gasser in my near future, wonder if there is a Spectra G attachment for my weed whacker? ;-)

350QX
Trex 450
Shuttle ZXX
Fury 55
Spectra G
Furion6
Trex 500

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04-07-2009 03:35 PM  9 years agoPost 39
Justin Stuart (RIP)

rrMaster

Plano, Texas

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wonder if there is a Spectra G attachment for my weed whacker?
I think I saw one at Home Depot--was pretty expensive however.

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04-07-2009 04:23 PM  9 years agoPost 40
TaleGunner

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Deer Park WA

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]wonder if there is a Spectra G attachment for my weed whacker?

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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