Align 91H Engine for Trex700

[Alan_Chow]

Which color you like? Blue or Black. I prefer the Blue one,
Displacement 14.95cc
Bore 27.7mm
Stroke 24.8mm
Practical 2000~16000rpm
Power output 3.4ps
Weight 618g


Source from Align Forum.

http://www.align.com.tw/disbb/attachments/20080703_fd8d80f0e9a50e67ba48nhtU8rn6XyHJ.jpg

http://www.align.com.tw/disbb/attachments/20080703_dab9c2faec7b07c3c019WoScq8rBHXIc.jpg

[rl_sexton]

I'll take a blue one too.

[LoveMyTrex]

the blue color looks cooler, but the black cooling head looks more efficient, if you could use the black one and anodize it blue I think that would look good

[huskynox]

the blue color looks cooler, but the black cooling head looks more efficient, if you could use the black one and anodize it blue I think that would look good

X2!!!

The finned rear engine cover is cool :thumbup:

[Finless]

Hehehehe.... not to rain on Aligns parade here but those are rebranded OS .91's...

The blue is the current OS .91 (same motor I used on my 700) and i believe the other one is possibly the new OS .91 coming out. The backplate is what holds the pump (pump not shown in the pics).

Actually the head on the Align version is slightly different.

http://www.osengines.com/engines/osmg1983-main-lg.jpg

Bob

[Finless]

Hmmm interestingv though... The specs are different so maybe Align is having this made different than the current OS .91????

OS Specs
SPECIFICATIONS
Stock Number: OSMG1983
Displacement: 0.91 cu in (15cc)
Bore: 1.02 in (25.8mm)
Stroke: 0.87 in (22.0mm)
Practical rpm: 2,000-16,000
Output: 3.3 hp @ 15,000 rpm
Weight w/o muffler: 21.3 oz (605 g)
Includes: #8 glow plug

[huskynox]

Hmmm interestingv though... The specs are different so maybe Align is having this made different than the current OS .91????

OS Specs
SPECIFICATIONS
Stock Number: OSMG1983
Displacement: 0.91 cu in (15cc)
Bore: 1.02 in (25.8mm)
Stroke: 0.87 in (22.0mm)
Practical rpm: 2,000-16,000
Output: 3.3 hp @ 15,000 rpm
Weight w/o muffler: 21.3 oz (605 g)
Includes: #8 glow plug

Bob, you were actually correct with your first post. The specs are the same as the SZ. I noticed the specs on the OS site were wrong a long time ago when I was comparing the YS91SR to the OS91SZ. If you download the manual for the SZ you will see the specs are the same as the Align motor......

http://www.helifreak.com/attachment.php?attachmentid=53623&stc=1&d=1215106893

[stevehonn]

Notice that the blue headed version has the heatsink backplate from the new HZ motor? This looks like a bit of a hybrid motor so maybe thats why the specs are different from the stock SZH.

[CoronaL]

when and how much?
and how about the pipes :)

[mk1spitfire]

Will there ever be be an YS rebadged Align 91?????

[mk1spitfire]

The power output and weight are different to the Align spec?

[Finless]

Yep... may HARD copy manual lists the same specs so the OS web site is incorrect...

Bob

[Alan_Chow]

when and how much?
and how about the pipes :)

yes they are also making the pipe for 700

not price and date about the engine and pipe yet.

http://www.align.com.tw/disbb/attachments/20080623_22f16766f3593c795dd7G8W1azBQnlFF.jpg

[mk1spitfire]

wonder if there will be a simalar price bundle as the 600 nitro super pro with the 700 engine/pipe etc?

[LoveMyTrex]

will align be making a pipe for the YS 91?

[Alan_Chow]

I just know that the engine with black is the new version of OS 91 engine...

http://www.hk-heliclub.com/attachments/forumid_21/20080715_cb08c0887452317036427dkEjjg3ufTK.jpg


http://www.hk-heliclub.com/attachments/forumid_21/20080715_b50ac62a94c04488b6f03ZLSsvkVQ70O.jpg

http://www.hk-heliclub.com/attachments/forumid_21/20080715_65ae1ae68d6fda477112a2GrLk9p55aH.jpg

http://www.hk-heliclub.com/attachments/forumid_21/20080715_08555b83f328e48fef972V4t4eNJRJFT.jpg

[Super D]

Hey Alan! Is that your OS HZ? Looks awesome!! does anyone know if they are out yet?

[Pulento]

The blue head version is pumped ?

I note also that the difference between the blue version and the OS 91SZ is the backplate, it comes with the same backplate as the new OS91HZ (which looks identically to the black version).

[Alan_Chow]

Hey Alan! Is that your OS HZ? Looks awesome!! does anyone know if they are out yet?

i hope this NEW OS engine is mine.....:(

see the little holes (total 5 of them) That's part of the new improvment.... there.

http://www.hk-heliclub.com/attachments/forumid_21/20080716_147dec3a6f5f9dc05bb1Pk25QOjemO6G.jpg.thum b.jpg

[mk1spitfire]

what do those holes do?

[harryboe]

what do those holes do?

They put pressure on the ring trough this holes to increase compression ..

Something YS does in their 4-Stroke engine for years now !!

[maxxteezy]

when does this engine hit the us market?

[brontal]

what do those holes do?




The piston is modified to attain a lighter body and better performance. The combustion gas presses on the piston ring from within through the five holes laid out on the piston top to minimize the blow-by gas.So the combustion energy is effectively transferred to the crankshaft

[invertsick]

So guyz,
No posts were added to this thread for a long time,

NE1 heard any thing about these engines?
What's the difference and when will e released.
I know they are on the align site, but how can we know what exactly is the difference between these 2?
Is any of them pumped?

thanks
serge

[TooLy]

Can anyone tell for sure which of the align engine is identical to o.s engine ?
Which one is the SZ and which one is the HZ ?
Do you think the viper head from the SZ will fit them ?

Thanks,
Roei