wagen017

I am in the process of setting up a Fliton Inspire-90 with a Saito-125 engine. Although electric is very easy etc. I am a glow four-stroke fan.

What I decided is to use a Hyde mount to protect the plane (and its servo's etc.) from vibration. Here some first picture of the inside of the plane and the mount on it.

My questions to this forum:
- who else is flying the Inspire on glow, and what kind of CoG did you end up with
- what kind of throws did you use for aileron/elevator. They are not specified in the manual or at the website.

Volkert

wagen017

I more or less finalized the plane. Have found out now I need to rework the engine (last plane landed in water, seems like the bearings didn't like that despite generous after run oiling afterwards).

Here some more pictures of the set up.

I replaced most linkages with either pull pull (elevators) and ball links.

Final weight is 3450 grams. I am really looking forward to flying this baby!

CoG seems to come out a the recommend aft position.

Volkert

bjw4072

My Feedback: (6)

My Inspire-90 with Saito-125 is completed but first flight will probably not be until next weekend
as there has been engine mounting issues and weather delays.
I first mounted the engine inverted and did some engine run-in tests on the ground.
I have now remounted the engine sideways.
In this model the tank is far above the carb when the engine is inverted and I strongly recommend
against an inverted engine setup. Fuel will run down into the carb.

I used a Saito metal mount for the engine. A soft mount may be better but I am not sure
how much better it will minimize airframe vibration.
Although I have carefully balanced the prop the vibration is quite large at full throttle.
This is typical for a model with light-weight plug-in wings.
The canopy and wings are held in place with M4 metal screws into metal T-nuts.
Metal in metal won't stay put under vibration and it was impossible to keep the canopy
screws in place; they would just vibrate out. I have now replaced them with
M4 size nylon screws that stay put. The two metal screws that hold the wings on
did not vibrate out but it is probably still a good idea to also replace those with nylon screws.

With a 5-cell A-size battery pack located between the receiver and tank the CG
came out about right in the forward part of the recommended range.

I have made some other minor changes and will let you know later how it flies.

wagen017

I agree on the engine setup, as you can see in the pictures I have rotated the engine as well. I also replaced all the metal screws by nylon. I also use 4 M4 nylon screws for holding the engine cover in place after tapping some M4 thread just behind the firewall.

I need to wait for the engine to come back from rework before I can fly. Hopefully I can let you know more in two weeks on my first experiences.

volkert

bjw4072

My Feedback: (6)

Flew my Inspire-90 last weekend. One quick trim flight then several contest flights.
Since the Saito-125 was fairly new I had it quite rich and the power was not as much as I would
have liked as the wind was quite strong; but leaning it out more next time should fix that.
The model's aerobatic capability exceeds my skills. It flies very well.
One of my landings was a bit hard and I noticed that the landing gear has started to de-laminate.
Some thin CA glue should fix it. Metal gear would be better and it is probably a good idea to buy a spare
landing gear.

wagen017

Flew mine as well for the first time. Great flying plane! Pairs very well with the Saito-125 as well. I think this is the best pattern plane I have flown sofar. I will use it to train myself, but I think it will be better than the current 2 meter ship I have now.

volkert

flyslow

I have been setting up my Inspire 90 with an OS120ax running a tuned pipe and a perry pump. It has been progressing well so far, but involved a sizeable modification to the fuselage to house the semi recessed tuned pipe. I measured the CofG the other night and it came out just 2-3mm behind the forward limit. The to do list is getting smaller, but its still a little way from its first flight. I'm looking forward to flying it as it looks like a great aircraft.

wagen017

Flyslow, looks like a great setup with hyde mount and Perry pump! What weight did you end up with? Mine with a Saito 125 is 3450grams.

Volkert