how can you prove it woos?
 

mine is faster that your
prove it?!!!!!!!!!!\
my plane is faster
.......

RE: how can you prove it woos?
 

[sm=confused.gif]

RE: how can you prove it woos?
 

If I am understanding what you are saying you should do a search in this forum for "doppler speed"...

RE: how can you prove it woos?
 

get it from my site
www.philsrcworld.fsnet.co.uk
then be prepared to go red faced as you tell your mates how fast your trainer really goes

RE: how can you prove it woos?
 

Dan;
There are 4 good ways.
1, Two men, two stopwatches, and a long measuring tape. (works ok).
2, Doppler method using an audio recording device of some type.
(works good when operated correctly)
3, GPS attached to the aircraft. Garmin Geko-201 works super and
it's safe and light.
4, Stalker sports radar gun. Its super but not as safe as the others
cause your looking down the nose of a 200 MPH plane to get accurate
speeds.

All methods have been talked about at length on this forum.....

Syd Clement

RE: how can you prove it woos?
 

phillybaby,
I used the speed program and I get this for speeds with my 15 LA powered Shrike...Almost 100 mph! I need more speed.

RE: how can you prove it woos?
 

You have two choices... get another plane... or get another program... I suggest you do the first...

RE: how can you prove it woos?
 

your getting the right rpm which should give you the right speed, but which line do you use? i find the second one up is the right one.
100 sounds quick, but i know my 21 shrike could do that, a 15la however?? sommit sounds wrong

RE: how can you prove it woos?
 

I also agree that 100 sounds way to quick for what the model is doing. I may try again tommorow to measure some sound. I put in the value of 10 in there like I read somewhere and that adds to the speed so maybe I shouldn't be putting that in the third column. I also think that the second curve from the bottom is the primary frequency because the engine rpms seem to be about what they should be, 16,000 rpm.

RE: how can you prove it woos?
 

I've found the best way to estimate speed is....
....watch the plane fly, and make a wild guess. [X(]

This has been proven to be about as accurate as other methods. :eek: