JASON THANKS FOR THE GREAT IDEA MY GAUGE WORKS GREAT.

arh don't mention it but I do come to the F.I.J.R each year and I drink lots of Corona.... Hint Hint.


Jason

So does mine!
I am making a few more for xmas presents!

Harley Condra
BVM REP
JetCat REP

Harley: I am in need of a X'mas present

we used ours this weekend.

Limeybob's Jetcat P-60 showed 12.4lbs thrust

I thought it would be more than that

This is a great idea. Has anyone checked one against a known force gage, or turned it up with a known weight on it, to see how accurate it is?

Joe

Hmmmmmmmmmm!!!!!!!!!!!!!!, this is what Limeybob wrote in another thread. Which is correct number?

I saw 12.4 from where I was standing which was behind the nose, he was in front and may have seen it spike to 12.7


I was expecting at least 13.5

I checked mine using a known five pound weight on top of the cone. It measured a repeatable 4 lbs 15 oz to 5 lbs 1 oz several times.
That's close enough for me.

I will be using it as as a reference anyway. It's close, but no cigar.


Harley Condra
BVM REP
JetCat REP

Sounds pretty good, Harley. I'll have to get one

Anyone using this to measure force with the cone against the nose of a model should expect it to read less than the rated thrust of the engine due to tailpipe losses and frictional losses of the tires against the pavement.

Joe

Will your reindeer reach my Island?

Cheers

Springbok Flyer

why are my posts being deleted????????

you are the most childish acting person I have ever seen.
You continue to edit and delete posts to suit you.

How much is JetCat paying you to delete or edit any post that you don't like?

Everytime you do this, it is having the opposite result that you intend.
Everytime you edit a Jetcat post or Mr. Matt pm's me to tell me I'm wrong, it makes me hate you and JetCat even more.

I swear to god I will never buy from JetCat again and it wont be because of the engine. It's from BS like this.

Joeflyer,
You're right.
Frictional losses of the tires is called "sticksion".
We did this at work on a SWB turbine powered small UAV in about 1996 to get a more accurate reading. We used a load cell instead of a fish scale.

Harley Condra
BVM REP
JetCat REP

Ronnie, you have a PM.

anyone?

Harley,
In 37 years as an automotive engineer I learned a few things that I can apply to this hobby.

Joe