Glide Ratio - Basics - BANDARRA

A simple explanation of glide ration in aviation and especially in relation to freeflight and paragliding.
#paragliding #parapente #gleitschirm
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[@drodo667]

great video

[@dmdemmym]

Thank you so much for your videos over the years. I have learned so much from you. You have kept things pretty simple and easy to understand and fun. I unfortunately have not had the opportunity truly fly yet because of resources and finances but I know when that day comes a lot of your teachings will be in my head😎 Thanks!!

[@AndreBandarra1]

Thank you so much, that makes us very happy 🤗

[@oceanwingzflyingschoolthai1899]

Thank you for short vdo. But easy understanding.

[@donatasjakutis4359]

super short informative

[@ambatisaishivamshu2844]

Am loving it and can i get a video based on more information on Glide Ratio

[@freason3898]

So when you calculate do you include the fusage in between the wings? Or just the wings without the body of the aircraft?

[@nathanbarraud4349]

That s good informations ! And can we have some news about the paraglider sim ? Or maybe can you sare the unity project so we can edit it ? It would be realy nice

[@justharryjohnson7250]

I would like to see this more in depth such as affects on wind strength and how that affects your overall distance. Like travelling with the wind would give x results and travelling into wind you would travel y distance.

[@AndreBandarra1]

That might be coming in a future video as there are many other factors that influence that and I just wanted to make a short basic video about glide ratio that we can use as a foundation for future videos and more complex concepts.

[@EVANGEaSCOOT]

Good info Andre now I can calculate from north pole to California how long Santas Sleigh takes to glide here for Christmas. Hopefully without the DEERS TAILWIND at 3600 feet..IF you know what I saying..lol. Sky Bean is your audio but this has a bigger meaning to think about. Thanks again.

[@AndreBandarra1]

ahah, I think they really need deer tailwind to get there otherwise they'd need to start so high santa would probably go hipoxic xD

[@EVANGEaSCOOT]

@@AndreBandarra1 I can't respond without my side hurting from laughing.bahaha

[@majedalsaeed4388]

How to know the glide ratio of my paramotor wing? Thank you for the topic

[@Ripstop_pilot]

Good BASIC information. What annoys me is when manufacturers refuse to give such information on their products because of the other factors that L/D is effected by. There should be a standard setting for wing performance to be measured by ie....brakes off, no pod harness, weight bang in the middle of its designed limits, legs back under the harness, arms behind risers, open face helmet etc. But real measured performance. At this point L/D doesn't change in lift, sink, head or tail wind only the distance it flies changes. I like this performance rating as it's indicative of the wings ability to cover distance in a given format which you can then have an Influence on by adding a pod, being aerodynamic ECT.

[@AndreBandarra1]

Yep, agreed. I think because the industry is so small in global terms and it is particularly hard to measure L/D or general performance of paragliders in a repeatable way that's why manufacturers are reluctant to provide hard figures. Probably most manufacturers don't even have access to a wind tunnel, but it would be very nice to have for sure. For me the ideal thing to have would be the polar curve of the wing I'm flying at a certain AUW. Maybe in the future who knows

[@Ripstop_pilot]

@@AndreBandarra1 a polar curve would be amazingly useful. You could then find visually, your speed to fly at any given weight plus an indication of stall speed.

[@ashghinn4630]

When I first got interested in hang gliding and paragliding in about 2002 I was frequently told that it was impossible to obtain meaningful performance values for hang gliders or paragliders. To me it felt implausible that this would be so. You can get performance data for almost every other product you can buy... including sailplanes! Around 2004, a German magazine Thermik started testing paragliders for glide ratio. They had a proper test setup, did all tests in still, early morning air with each tested paraglider flown at trim with a standard harness and alongside their standard "comparison" glider. The recorded data was extremely consistent, and it was immediately clear that their figures were reliable. It was also clear that a number of manufacturers had been exaggerating their claims! So although it's a bit time-consuming to obtain good data for paraglider performance, it's certainly possible. I'd imagine the main reason it isn't still done is that there's little interest for such testing within the industry.

[@KorayU.]

Best EN A paraglider for glide ratio? 🙂

[@lukmanulhakimdrihim8804]

Thankyou so much , please answer my question , why do many companies make aircraft with the greatest possible glide ratio, what is the relationship? Its kind of you to answer my question

[@AndreBandarra1]

The higher the glider ratio the more efficient the aircraft is. This means in practise less fuel burnt, more range, less stress on the structure, more safety, etc etc.

[@bhargavmonpara9549]

plane at 11500 meter up and its glide ratio of 14. What will be for this aircraft the glide angle (in degrees)? (Provide your answer with three decimals)

[@lucywucyyy]

whats the best glide ratio a paraglider can have? i know a sail plane can have 50:1 can a paraglider do that too?

[@AndreBandarra1]

with currently technology, around 11 or 12:1 at max

[@lucywucyyy]

@@AndreBandarra1 well thats still pretty good but im kinda disappointed

[@nitro200flyer3]

Topic snagged me ( Click Bait ?) ..but want more in depth like best wing setting for furthest glide .. when I'm flying I always think motor out and not sure what is best trim setting for furthest travel etc..Slow , Fast or Neutral ?

[@mbrunnme]

Click bait usually implies there was a switch of some kind. In what way was this video not exactly what the title promised? Also, if you want to know where your wing performs best, there is no substitute for empirical measurement. If you're flying a paramotor you should at least have a watch/altimeter on board. Just fly trims out, time your descent and then do the same trims in. You should know your trim speeds at different settings, so just use your groundspeed to correct for wind and there you go. Glide rate for different settings. If you can land trims out on your wing, then to ideally make it to an emergency LZ you should use whatever trim setting will get you there in that situation.

[@AndreBandarra1]

That might be coming in a future video as there are many other factors that influence that and I just wanted to make a short basic video about glide ratio that we can use as a foundation for future videos and more complex concepts.

[@Ripstop_pilot]

On modern gliders, best glide is at trim. Hands up. No speed bar. It's the most efficient wing position

[@mbrunnme]

@@Ripstop_pilot Actually many modern gliders get slightly better glide with light brake pressure.