Landing a Microlight in water - without floats

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mulderpm
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Landing a Microlight in water - without floats

Postby mulderpm » Wed Oct 02, 2013 11:00 am

Food for thought. What is recommended? Jump or Stay?

In Southern Africa, we do not have many areas with large expanses of open water that has to be crossed, but when flying in coastal areas to islands then this situation may be unavoidable.

This is a verbatim article by a New Zealand pilot flying an Airborne Trike;

"I was over flying my summer house which is on a small island about 1 km from the mainland. I was orbiting at about 1000 feet when the engine began to loose power. I changed from the back to the under seat tank but was unable to gain an increase in r.p.m. I did not have sufficient height to glide to the mainland or time to get a hand under the back seat and pump the primer so a ditching was the only option. The island my summer house stands upon is all tree and rocks, so I decided that the water option was better than a treetop landing.

I flew towards the shore in order to land in the shallowest water possible and released my seat belt and my intercom lead. As an after- thought I plugged the intercom lead back in with the intention of calling a PAN but in the ensuring landing forgot about the emergency call.

I performed a "normal landing approach and flare" and settled gently onto the surface back wheels first. A large bow wave built up and acted as an "air cushion" and I was not thrown forward into the front strut. The trike slewed over to the right, the right wingtip contacted the water and the aircraft began to sink very quickly in an engine first, back down attitude. I tried to exit the aircraft but was trapped between the seat frame and the training bars mounted on the uprights.

The aircraft sunk and settled gently onto the bottom at about three metres depth and suddenly the wing moved forward allowing me to exit the aircraft. I swam to the surface and was stopped by the headset lead about 30 cms under the surface and had to use considerable force to break the cable.

Time under water was about a minute and was very close to the limit of my endurance. I did not panic during the exit procedure but was very disorientated under water as to what was up and down and which way to !
swim in order to avoid becoming tangled in the rigging wires.

I was picked up immediately by a pleasure boat and taken to land. I spend a night in hospital for observation as I swallowed a lot of water. I was discharged the next morning with a clean bill of health.

When asked "What will you do next time it happens, jump or stay?" he replied;

"I think that I would sit sideways on the seat with my feet outside of the pod and fly the machine down to a couple of meters off of the surface. I would then jump out to the side using the drag links as a "springboard". I would prefer this method as I would be extremely concerned about being trapped in the aircraft under water and drowning"

Moral of the story???

Do not fly over water if you do not have a suitable landing field within gliding distance, but then you all knew that!!!!
Look before you leap.

Cause of engine failure: Crap in one of the fuel pump valves."

------------------------------------0--------------------------------------

Fortunately this has never happened to me but I intend to go back to Mozambique next year and fly to some of the islands. Thus, the interest in this scenario.

Advice from other pilots/instructors who have overflown water.... in the event of an engine out over open water....head for a ship and try to land as close to it as possible. They can rescue you. Also, fly with as little as possible clothes on...Bundy style...when wet your flight suit pulls you down and, if possible, wear a floatation jacket.

Fly Safe (^^)
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Re: Landing a Microlight in water - without floats

Postby nicow » Wed Oct 02, 2013 12:14 pm

It is the best (and the law) to fly gliding distance from the shore...
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Re: Landing a Microlight in water - without floats

Postby Bundy » Thu Oct 03, 2013 5:13 am

mulderpm wrote:Food for thought. What is recommended? Jump or Stay?
Firstly, can anyone tell me what the typical gliding ratio is for an Aquilla? I'll be honest...I do not know and I cant find any reference to it in the manuel?

I cant think of many things worse that ditching in a trike. From what I've read (and there was a thread on this a while back but I cant find it) the nose wheel tends to "dig" or in this case "dive" in as soon as the back wheels make contact. Momentum carries the aircraft forward but the undercarriage is already ploughing through the water... Nose cone goes in...bar slamming against chest..... you, PAX and engine end up wrapped in the wing...and cables...and and and... :shock:

If it was me...as soon as that engine goes you need to yell Mayday and report your position.... start unbuckling head sets, helmets...kick off shoes. Swing one leg over the pod (side saddle) and glide her down as close as you can get to "something"..... 20 ft above the water...I'm going to jump. No doubt about it.
You should definitely wear a lifejacket and preferably not a std flight suit? Luckily in Mocam that will not be a prob... :wink:

I have only been to the Benguerra Island area in a Cessna and by boat....many years ago. From what I remember, there are many dotted sand bars (some permanent, some not) in between the various islands which will be useful in an emergency. Best to route via these and at low tide? At low tise you will have many more options...(albeit temporary ones) They are typically 1-4 miles apart Judging from Google Earth if you come from the Margaruque side towards Benguerra and then on to Bazaruto. To plan your height you need to know the answer to my question above...

Anybody know?

I know you had a blast on your first trip...sounds like a wicked trip Paul! Happy Planning! (^^)
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Re: Landing a Microlight in water - without floats

Postby mulderpm » Thu Oct 03, 2013 8:08 am

Thanks for your inputs Al. I agree with all your statements and that is the way I would handle the situation as well. About the glide ratio, if I can go according to my instruments I get between 6 and 7.5 to 1. Trikes do not glide very well. Nico, the Sling must have an amazing glide ratio..... :lol: :lol:

Usually the trike is a write off when it hits the water, so no need to try and recover it. Maybe the engine could be refurbished if it did not spend too much time in the salt water. What I also learnt from the article is that the training bars were a barrier. I can quite believe this as they do get in the way when I get in or out of my trike. So, they will come off for such a trip. Also for most of the trips to the islands along the coast of Moz, if you are high enough, the shore is within gliding distance but it is not landable. Soft sand, mangrove swamps, rocks or tidal sand banks. It is always best, when flying along the coast, to fly at low tide and preferably on a spring low tide (full moon or new moon).

Unfortunately this trip will have to be next year. I don't have enough $$$time$$$ this year.It is going to be a great experience. Can't wait. (^^)
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Re: Landing a Microlight in water - without floats

Postby Piet Bez » Thu Oct 03, 2013 10:11 am

Tien Pool Noodles in elke vlerk en 'n Goeie Life Jacket. All systems Go. (^^) (!!) (!!) (^^)
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Re: Landing a Microlight in water - without floats

Postby mulderpm » Thu Oct 03, 2013 10:38 am

Piet Bez wrote:Tien Pool Noodles in elke vlerk en 'n Goeie Life Jacket. All systems Go. (^^) (!!) (!!) (^^)
Thanks Pieter. Ek het die ding van Pool Noodles ook al gehoor. As jy net dink, een Pool Noodle hou n' 90 kg ou se kop bokant die water. So, om 195 kg te laat float het jy net 2 of 3 nodig. 6, 3 in elke vlerk, en jy kan bo op die vlerk sit....om weg te kom van die haaie. :shock: En hulle weeg niks! Sal dit doen.

Sien ons jou Saterdag (^^) (^^) Sien nie jou naam op die lys nie ## ##
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Re: Landing a Microlight in water - without floats

Postby Bundy » Thu Oct 03, 2013 11:01 am

Ok...so lets say to be conservative a trike may glide at 1:6

So for every 1NM off shore (6076ft) you will need 1013 ft in height.... bare minimum without any wind... plus say en extra 500ft for (skrik factor)

My maths right?
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Re: Landing a Microlight in water - without floats

Postby Meiring » Thu Oct 03, 2013 12:33 pm

Now for the other side of the coin. F1 Powerboat racers used to race without being strapped in, same argument, they did't want to be strapped in and drown in a sinking boat after a crash. Those days we had at least one to two fatalities per season. Peter Lindenburg then pioneered the idea that when strapped in, you may have a better chance in a crash as the chances are you will be coherent and be able to extract yourself (not very likely if you were knocked out cold). Most racers adopted this idea and fatalities almost never happened after that. To adopt the F1 Powerboat survival concept to this question then: 1. Stay strapped in, your chances of staying coherent is higher and you can extract yourself from the wreckage. 2. A life jacket helps cushion the blows to your body and indicates the way up when you are disorientated under water . 3. By sitting sideways, you expose body parts that may strike the water and pull/slam you against the plane ??

I had one serious crash in an F1 powerboat, flipped it at 200 km/h at Witbank Dam in 2007. Lesson learned from that is that you are lucky or not. There 's not much you can control in such an incident!!

Landing a microlight on water, hopefully never as it's difficult enough on a solid runway at the moment!!
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Re: Landing a Microlight in water - without floats

Postby mulderpm » Thu Oct 03, 2013 2:33 pm

Thanks Meiring for your input. (^^) The difference in a Trike is you have, although not much, but you do have some time to "plan" your escape. In a F1 power boat at 200km/h a flip and crash is pretty instant. The seat belt in a trike is....in my humble opinion, ....there for the same reason as in any vehicle, to prevent you from flying forward, hitting something which injures you, or hits you and makes you in-compos mentos. Very important if you ever crash. Also, to prevent you from falling out in very severe turbulence. I would also not suggest you bale out of a boat doing 200km/h. In a water landing trike, for protection reasons, I would not remove my helmet nor any part of my scanty clothing before jumping out. ## Hitting the water, curled up in a ball, at an angle, at 35 mph should be ok? I hope! (**)

Sounds like you are still in early days of flying. Welcome to this wonderful, awesome sport. If you are close to Microland come and join us. (^^) (^^)
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Re: Landing a Microlight in water - without floats

Postby Meiring » Thu Oct 03, 2013 3:15 pm

Hi Paul, thanks for the welcoming words. Yes I'm VERY VERY new, only went solo yesterday !!! Just glad the weather is improving, the bumps up high is ok, but eish the crosswind landing thing is really scary. Landing in water, no thanks.
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Re: Landing a Microlight in water - without floats

Postby Piet Bez » Thu Oct 03, 2013 3:52 pm

Paul, die beste is om met Fanie by Skyriders te praat oor die pool noodle ding. Het dit by hom gehoor. Blykbaar dit gedoen jare terug toe hy flips gedoen het aan die kus. Ek glo nie iemand het al getoets of dit werk nie maar in beginsel behoort dit te werk. Sal Saterdagoggend vroeg daar wees om net so bietjie die enjin te roer en so ent te vlieg. Moet ongelukkig weer 09h00 die winkel oopsluit so kan ongelukkig nie bly vir die lesing nie, sou bitter graag wou.
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Re: Landing a Microlight in water - without floats

Postby bobthebuilder » Thu Oct 03, 2013 6:15 pm

Hi Paul,

Interesting post ..... My thoughts ....
glide her down as close as you can get to "something"..... 20 ft above the water...I'm going to jump. No doubt about it.
By jumping, you may alter the CG dramatically. I think this would cause the trike to pitch up violently. (Yes / No / Maybe?)
Who cares .... your ass won't be sitting in it anymore right?
If the engine is still running, the prop may cause some injuiries if you happen to pass it closely during your bail-out.
Killing the mags would probably be a good idea.

.... my 2c
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Re: Landing a Microlight in water - without floats

Postby Bundy » Fri Oct 04, 2013 4:22 am

Wise advice Byron....and could be the difference between swimming to safety and shark chum. (**) :shock:
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Re: Landing a Microlight in water - without floats

Postby mulderpm » Fri Oct 04, 2013 6:44 am

bobthebuilder wrote:Hi Paul,

Interesting post ..... My thoughts ....
glide her down as close as you can get to "something"..... 20 ft above the water...I'm going to jump. No doubt about it.
By jumping, you may alter the CG dramatically. I think this would cause the trike to pitch up violently. (Yes / No / Maybe?)
Who cares .... your ass won't be sitting in it anymore right?
If the engine is still running, the prop may cause some injuiries if you happen to pass it closely during your bail-out.
Killing the mags would probably be a good idea.

.... my 2c
Thanks Byron for your thoughts. (^^) If the engine is still running I won't ditch the trike except if there was a structural failure in which case I would definitely kill the mags before jumping.

I agree, the W&B will be very different when I jump, but I won't notice as I will be in the water, on my own. Would be interesting to hear/predict how a trike flies without a pilots weight.

One more factor, Dionne will be with me. Now two of us have to bail. I am first.....no....I am.... ##
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Re: Landing a Microlight in water - without floats

Postby mulderpm » Fri Oct 04, 2013 8:04 am

Meiring wrote:Hi Paul, thanks for the welcoming words. Yes I'm VERY VERY new, only went solo yesterday !!! Just glad the weather is improving, the bumps up high is ok, but eish the crosswind landing thing is really scary. Landing in water, no thanks.
Congrats Meiring. (^^) (^^) One for the Solo wall Bundy. Any pictures?
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