GC2 numbers off?

[Ironstrokes]

Question for the gc2 users out the and/ or anyone familiar with the flight scope trajectory optimizer and even more curious the results on optimal flight as I hear this is what the gc2 possibly uses as their algorithm (if someone can run the numbers for me). I've tried downloading optimal flight myself but keep getting a message about needed macros enabled and all and gave up for the night. I'm sure I can get it going but figured I'd pick some minds here.

I'm running the 4.0.0.15 firmware right now, have tried the 3.5 one as well and saw similar results.

Emailed foresight about this too and they said they believe everything is working as it should. But just curious if everyone else is getting the same type of readings (especially with optimum flight).

The gc2 screen readouts compared to the flightscope analyzer I figured would be closer then I'm seeing. I'm seeing 3-5 yards short every time in the gc2 and sometimes up to 7 yards.

I know gc2 doesn't use the same algorithm as flight scope analyzer but just felt like still a pretty big difference for programs meant to do the same thing.

So anyone else getting these type of results and I'm just over thinking it and these differences are within reason or does something seem a bit off?

Also just recently tried it with the skytrak today at the same time and was consistently getting 2 or 3 more mph ball speed on that and 3-6 yards more carry.

[goatbarn]

Hmm. I guess I never noticed that GC2's ball flight algorithms were shorter on average vs Flightscopes.

I'd check out optimal flight's when you can, I think it's going to be closer.

I've always been a little bit short when hitting on my GC2, but I chaulk it up to indoor swinging. But GC2 vs Flightscope I always thought was pretty similar.

Maybe Flightscope's online optimizer is calibrated to driver type inputs numbers? I know optimal flight has a different setup for irons vs driver...

[Js1010]

Here are Optimal Flight Numbers in this PIc.



Here is my take on all these different carry algorightms.


Gc2 - find yardages good overall except when you get in a lower spin range for a given club. So sub 2k for Driver will yield longer carry than I think is real. I see this myself as I tend to hit up on my driver and get a lot of low spin drives. You can also look at just about any Rick Shiels driver video on youtube.

Optimal Flight I find very good and pretty close to GC2 for Irons. With Driver I think its the oppsite of GC2, seems a bit low carry once you get around and under 2000 backspin.


FlightScope - I like its driver number overall but Irons are off or not targeted in their opimizer.


In general, I think the more inconsistent you are and find the outside ranges for a given club the more likely you are to get weird carry yardages with all these algorightms.





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[Ironstrokes]

Here are Optimal Flight Numbers in this PIc.



Here is my take on all these different carry algorightms.


Gc2 - find yardages good overall except when you get in a lower spin range for a given club. So sub 2k for Driver will yield longer carry than I think is real. I see this myself as I tend to hit up on my driver and get a lot of low spin drives. You can also look at just about any Rick Shiels driver video on youtube.

Optimal Flight I find very good and pretty close to GC2 for Irons. With Driver I think its the oppsite of GC2, seems a bit low carry once you get around and under 2000 backspin.


FlightScope - I like its driver number overall but Irons are off or not targeted in their opimizer.


In general, I think the more inconsistent you are and find the outside ranges for a given club the more likely you are to get weird carry yardages with all these algorightms.





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Thank you very much for running the numbers! Very interesting and reassuring to see that they are very close to what the gc2 is reading out.

I have no problem with carry numbers being a bit shorter as long as it's accurate and just was hoping others were seeing the same.

It's weird how the skytrak was reading consistently a couple yards and mph higher for me. I obviously know their tech isn't as high end as gc2, and the degree of error I thought was still only a mph or 2 on ball speed, but weird it was always on the higher end in the skytrak and not a mix back and forth. Gonna have to do some more tests with that and see if it was just me somehow, definitely threw me off a bit and have to re get used my different carry numbers.

Finally getting some nice weather the next couple of days in the northeast and look forward to trying it out on the range....gonna have to buy a laser though haha

[Ryan5508]

I also feel the gc2 is short mainly just with irons.

Driver seems slightly long but only on extreme low spin shots

Wedges, woods and hybrids seem right on.

I find myself constantly hitting 5-8 yards short with almost all my irons vs outside. I consistently hit a 7i outside 160-165 but will struggle on the GC2 to hit 158 carry. I find myself clubing up more when playing on the sim then I ever would outside.

[Ironstrokes]

I also feel the gc2 is short mainly just with irons.

Driver seems slightly long but only on extreme low spin shots

Wedges, woods and hybrids seem right on.

I find myself constantly hitting 5-8 yards short with almost all my irons vs outside. I consistently hit a 7i outside 160-165 but will struggle on the GC2 to hit 158 carry. I find myself clubing up more when playing on the sim then I ever would outside.

Exactly! The drives seem to may be pushing on a little long especially on those low spinners like you said here, while the irons feel short in that 3-5+ yard range. Gonna try and buy a range finder and do some range testing this weekend. Ill get a general idea tomorrow though when I play out on the course to how close the carry is.

Wonder if this is the same with everyones gc2s read out and might just think ive been carrying my irons longer then it actually is for the whole time ive been using the skytrak. Thats a little disheartening.

Anyone with some solid rangefinder numbers able to confirm the gc2 screen readouts as well? Guess its tough to know exactly unless you are at sea level too. Im only at 500ft, so that really should only equal like 2 or 3 extra yards at most i believe. Ill post back with any results I get

[FaultyClubs]

People say altitude increases carry but I wouldn't assume that since i believe it depends on your actual ball flight parameters.

Also laser rangefinder is great but an accurate range test with it is tricky. You need to be using your own golf balls not range balls. You need to be sure the range is level (most aren't). You need to be sure about wind etc. You need to know exactly where the ball lands from a ball mark since it is very difficult to see from the hitting position and I'd say impossible with a driver at 240 yards etc. So people always say take it to the range and test but if you are chasing accuracy of a few yards it isn't easy IMHO.

[wbond]

I always make a comment to test at a range, with a rangefinder. The caveat is that it is to test if the unit is grossly off, one should be able to see this quite easily. Example, hit a target that is 135 yds, did my ball carry long or short of this, should be easy to tell. Carried longer, unit says 120's. Unit is off. Does ball flight match, easily verifiable. The farther out the target, the more difficult to verify. Agreed, if you are questioning a few yards, this is not the right test. Problem is most people say its 10-20 yds short of their real life,

[Ryan5508]

I check my distances with a Nikon 80i vr range finder and gamegolf for on course.

I do think a lot of it comes down to the hitting mats scrubbing more speed off the hits then cutting through the grass would.

[Ironstrokes]

Rangefinder will be useful on the course for comparison as you can tag your target, hit the shot, and see your carry (hopefully by the ball mark on the green)...but useless on the range - range balls are shite, lasering targets and then guessing from a distance where your ball landed?

Good point, didn't think about the crap range balls. If I'm carrying way further even on the range though with those balls gotta figure something is probably up. I'll definitely try it on the course today though

[FaultyClubs]

....didn't think about the crap range balls. If I'm carrying way further even on the range though with those balls gotta figure something is probably up.....

Can't determine anything with range balls. See this for example: http://www.golfdigest.com/story/gd-tested-range-balls

[Taylor40299]

Gc2 is not accurate on distances. Have been checking with laser and gps. In my situation, it's off by a club or more. I can't hit my 5 wood more than 203 carry on gc2. On the course it's my 235 to 250 club. I use it on a par 4 that is 245 and have often landed on the fly. IRL Full pitching wedge is 130, not killed. Can barely get a 9 iron 130 Cary on gc2. Very accurate on ball flight. I'd be happy to know what's not right. I'm using FR1.

[Js1010]

Post your launch numbers of a 5W that should have gone 235 but only 200 on GC2. Is this in FR1 or are you getting same numbers on the GC2 itself? By the way you can press the gc2 speaker so it will speak out the numbers while its connected to Fr1.

[Snaphook]

Please post your launch numbers. Maybe something is wrong with your unit? I have FR1 myself and the distances in the software are exactly the same as on the gc2 itself.

[Taylor40299]

Update. I raised the GC2 about an inch above the hitting surface today. It increased yardage by about 10 yards a club. An inlaw came over today to check it out because I was complaining about distances. His shot were a club short as well. We tried raising the unit and both noticed an difference immediately. If you factor in sea level for a few yards as well I think it is very close. When I'm in Florida I feel a about a 3/4 club short. I would post my numbers but don't now how to get pic into thread. As I mentioned before could not get my 5 wood to carry more than about 203. Now I carry it 230. Short and mid irons did not see but about 10 yard increase.

[TorchRedRob]

trackman on altitude, if you can decipher anything from it after the initial graphs...

https://www.youtube.com/watch?v=KBrVOc21kiI

[Ironstrokes]

I check my distances with a Nikon 80i vr range finder and gamegolf for on course.

I do think a lot of it comes down to the hitting mats scrubbing more speed off the hits then cutting through the grass would.

Yea I would probably chalk it up to this as well if the skytrak wasn't still reading 5 or so yards more still off the same mat. I'm inclined to think that it's just because the skytrak is using a different algorithm. But 5 yards difference feels like a lot and someone's algorithm needs some real fine tuning then.

[Ironstrokes]

Gc2 is not accurate on distances. Have been checking with laser and gps. In my situation, it's off by a club or more. I can't hit my 5 wood more than 203 carry on gc2. On the course it's my 235 to 250 club. I use it on a par 4 that is 245 and have often landed on the fly. IRL Full pitching wedge is 130, not killed. Can barely get a 9 iron 130 Cary on gc2. Very accurate on ball flight. I'd be happy to know what's not right. I'm using FR1.

Exactly the way I feel with my distance on it! Good to see others feel the same way. Hate having to possibly boost any clubs, not going that route until I'm desperate and know 100 percent if it's actually short or not

[Ironstrokes]

Can't determine anything with range balls. See this for example: http://www.golfdigest.com/story/gd-tested-range-balls

Wow! 165 - 215 range on a 7 iron test with range balls! Yea scratch the range test of being that useful.

But even if it is flying 200 yards or whatever, if i can somehow mark that spot exactly then I'd still know if the gc2 was a little short in its readings...but like you said, the wind for only a 5 yards difference is probably gonna be impossible to tell at any reasonable distance

[Snaphook]

A good way to test is to have a friend standing on a green you are hitting in to. After each shot he can go over to the pitchmark and laser the distance to you.
This can be done with a driver aswell. Just make sure you are on a level hole and there is no wind. (Depending on your skill level you might want to give him a helmet :-)
I find the GC2 very accurate, except the really low spin drives, wich are overestimated in carry.

[Ironstrokes]

Post your launch numbers of a 5W that should have gone 235 but only 200 on GC2. Is this in FR1 or are you getting same numbers on the GC2 itself? By the way you can press the gc2 speaker so it will speak out the numbers while its connected to Fr1.

I'm curious the numbers he's getting there as well. I definitely see a similar situation as him with the irons. The 5 wood seemed to be ok with the read outs for me. It did still feel a little short compared to the skytrak and what I expected it would go. But not a 30 yard difference I don't believe. But have been more obsessed with my iron and driver testing recently, so gotta take a closer look at the fairway woods personally