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HomeAircraftHelicopterGasser Model RC HelicoptersOther › Spectra engine mounting direction?
03-09-2010 04:29 PM  8 years agoPost 1
ChrisK7

rrApprentice

Stanfield, Ore. 97875

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I've noticed that a lot of the Spectra fliers have the engine head facing rearward, rather than forward.
Is that for better separation of the coil wire from the rest of the electronics and or balance?

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03-09-2010 04:32 PM  8 years agoPost 2
Justin Stuart (RIP)

rrMaster

Plano, Texas

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The engine mounted rearward gives the helicopter a more neutral balance which is better for 3D. With the engine pointed forwards, there is a little more nose weight which is good for FAI style flying.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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03-09-2010 04:37 PM  8 years agoPost 3
rbort

rrProfessor

Franklin, MA - USA

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Not only that but
The spark plug is easily accessable,
The muffler needs no canopy cuts,
The carb needs very minor canopy cuts.

I think its more ideal all around, and the model balances fine.

-=>Raja.

MA 1005 Hanson 280, 4210 flts
Spectra 27 3DMax, 3280 flts
Whiplash V1-2 Hanson 300, 1555 flts
Whiplash V2 Hanson 300, 393 flts

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03-10-2010 12:22 AM  8 years agoPost 4
Mike545

rrVeteran

gettysburg, pa

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Chris listen to Raja, he knows, ive seen him fly, I just stand there in awl

"always feel thankful..... never entitled"

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03-10-2010 02:30 PM  8 years agoPost 5
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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and for another viewpoint:

the forward mount provides some advantages as well. here are some thoughts:
  1. you can mount the fuel tank behind the motor where its visible. If you need to carry more fuel, you can add a tank on the front mount and then chain the fuel lines
  2. if you use a muffler designed for a front mount engine (hatori does make them) you only have to notch the canopy for the carb and for the muffler. The templates in the manual are accurate and make this easy.
  3. the forward mount will give the model a slight nose down cg. whether or not this is good for you depends on how you fly. If you consider yourself a sport flyer, this is the typical cg because loops and rolls will take less control input to make them look good.
  4. plug access - okay you have to remove the canopy. Its a gasoline model. once you get the mixture right you don't need to look at the plug anymore. After you get used to it, you'll know from the sound if the mixture is off just like with a glow model.
  5. The model has a more balanced look to it.
  6. If you run one of the insulated plug caps you will either have to move the ignition coil. BTW, this is still a problem if you run the motor facing backwards. The coil wire itself isn't long enough.
  7. with todays radios, the proximity of the plug wire to the electronics is a non-issue
for what its worth, I've been running them in a forward facing config since the model was introduced.

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03-10-2010 02:41 PM  8 years agoPost 6
ddavison

rrVeteran

Brownsville, Pennsylvania

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I second Carey's comments. Ran mine to the rear first, then changed it around to tha front and like it that way a lot better. Check my gallery for pictures. Dave

DaveDavison,GasGob,WhiplashGas,Spectra,JRXG11MV,12X

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