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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Novarossi R91HR 3D-V2 Owners Thread
02-01-2010 12:21 PM  8 years agoPost 21
stuartmp74

rrApprentice

Gold Coast, Australia

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So we have a consensus, Thanks Gorn & Luca for your input.

I am using 'Arctic Silver Thermal Compound' as my thermal epoxy.

I usually cut two pieces of balsa that same shape as the fin groove in the head.

This creates a cavity for me to fill with the Arctic Silver.

I then cover the end of the sensor and push the sensor up against the inside of the groove in the cooling fin of the head.

I will install the sensor into 'Location 2'

Thanks again.

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02-01-2010 02:14 PM  8 years agoPost 22
gorn

rrElite Veteran

Western Australia

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Luca
What about for my earlier version round cylinder head?

For the love of the hobby

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02-15-2010 08:43 AM  8 years agoPost 23
stuartmp74

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Gold Coast, Australia

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Here are some pictures of the Engine Installed in a Trex 700

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02-15-2010 10:07 AM  8 years agoPost 24
ININVERNO

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San Leandro - Ca - USA / Mandello del Lario - IT

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Very nice job man. my congratulation.
Please let us know the rex 91 perfromance feeling.
TTYL
Luca

Luca Invernizzi - ininverno@yahoo.com

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03-03-2010 11:54 PM  8 years agoPost 25
stuartmp74

rrApprentice

Gold Coast, Australia

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Exhaust gas cooler mounts
Hi All,

I have had quite a few PM asking where I bought the Exhaust gas cooler mounts from.

I actually hand made them from some Aluminum angle from a drawing I modeled up.

See Attached PDF.

Just print the drawing out 1:1 then cut out the patterns.
Then just stick them on the faces of the angle, scribe around the edges etc etc.

4mm hole in the side & 3.5mm hole in the base

https://rc.runryder.com/gallery/603...unt_Bracket.pdf

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03-07-2010 11:39 PM  8 years agoPost 26
cudaboy_71

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sacramento, ca, u.s.

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thanks again to stuart.

here's my go at the cooler mounts. my machine work was kinda crappy. but, a nice coat of black and clear makes it look just fine

if it ain't broke, break it.

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03-07-2010 11:48 PM  8 years agoPost 27
stuartmp74

rrApprentice

Gold Coast, Australia

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I agree, Your brackets look just fine.
Fit for purpose, that's all that matters.

Glad I could help, Hopefully Lynx Heli innovations will product a fully machinced set one day.

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04-09-2010 08:58 PM  8 years agoPost 28
INVERTSICK

rrNovice

Glendale CA

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ok guyz,

I was reading all the previous posts in this thread ,
What about the power of this engine???
how much are you satisfied after you finished the break in?

I bought this V2 engine like 2 weeks ago and im totally unsatisfied with its power

please let me know what kind of power are you getting.

sergio

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04-10-2010 12:57 AM  8 years agoPost 29
gorn

rrElite Veteran

Western Australia

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Hoses my old HZ easy.
One thing with the Nova, you must tune it for peak power, and you HAVE to rev it hard.
You cant run it quite rich and make good power, yes it will do that, but it wont set your pants on fire either lol.

What heli is it in, what HS, and what % nitro and oil?

For the love of the hobby

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04-10-2010 07:20 AM  8 years agoPost 30
INVERTSICK

rrNovice

Glendale CA

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it's in a 700,
30% cool power
0.5 head shims

and im not even trying to find the peak power yet
im way far from the peak power.
it feels very weak and high temps.

headspeed 2050

the rpm is there
you can feel the engine screaming when in hovering.
but as soon as I apply pitch it dies

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04-10-2010 12:51 PM  8 years agoPost 31
gorn

rrElite Veteran

Western Australia

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sounds like you may have an air leak somewhere.
Have you used a temp gun, and if so, what temps are you getting?

For the love of the hobby

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04-13-2010 10:40 AM  8 years agoPost 32
stuartmp74

rrApprentice

Gold Coast, Australia

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Hi Guy's,

I thought I would give you all some feedback on how my N91 is going.
This is my first 90 size heli and the N91 is the first 91 size engine I have had anything to do with.

I must admit that after my heli was run-in I did initially try to get the engine to produce maximum power. I was however a little disappointed with the result. It seamed to get to hot and was not producing as much power as I would have thought a 91 size heli would have. Keeping in mind that I have been flying the N57 for two year now.

So I just see the engine up to run within the temperature ranges as specified in the manual. I then just flew my T-700 to get used to a 90 size heli.

Well to my surprise after I had put about 18 tanks through it the Engine just came alive. (I had mad no changes to the carb at all) it was like unleashing a wild best this power just suddenly seamed to come out of no where needless to say I am very happy with the N91 current performance.

I refueled 4 more times that day and the Engine just kept on pulling like a teenager who just discovered his dad's porno collection.

Thing is it is still blowing heaps of smoke and the temps are only about 46 and 108 degrees c.

Just think what it would be like with the tuning stop on.

----------------------------------------------

Please keep in mind that if you own this engine it is very important to ensure a perfect seal between the carburetor and the crank case.

You must compress the carburetor o-ring correctly into the crank case to ensure a perfect seal.

Follow this procedure and you will ensure a perfect seal.

1- Under screw the locking carburetor screw.

2- Using a medium size screw driver or a main shaft so you can easy make a lever between the carburetor and the fan shroud and then push the carb down quite firmly.

3- When the carburetor is pressed down, now at the same time lock the screw , now the carburetors o-ring should be seated very well inside the crank case.

I hope this feedback help you all.

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05-17-2010 12:30 AM  8 years agoPost 33
Mrwhipels

rrNovice

Fairport, NY-USA

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