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Tow plane types/mods for high density altitude glider towing



 
 
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  #31  
Old August 16th 19, 02:20 AM posted to rec.aviation.soaring
[email protected]
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Default Tow plane types/mods for high density altitude glider towing

On Tuesday, August 13, 2019 at 11:38:43 AM UTC+10, son_of_flubber wrote:
What are your favorite aircraft types (and modifications) for glider towing in high density altitude and/or short runways?


eTugs are now certified in Australia and are in production. Tow costs are half avgas powered PA25 - 235 tugs.
Michael
  #32  
Old August 16th 19, 03:59 AM posted to rec.aviation.soaring
Craig Funston[_3_]
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Default Tow plane types/mods for high density altitude glider towing

On Thursday, August 15, 2019 at 6:20:09 PM UTC-7, wrote:
On Tuesday, August 13, 2019 at 11:38:43 AM UTC+10, son_of_flubber wrote:
What are your favorite aircraft types (and modifications) for glider towing in high density altitude and/or short runways?


eTugs are now certified in Australia and are in production. Tow costs are half avgas powered PA25 - 235 tugs.
Michael


Michael, are they producing a two seat version of the eTug?

Cheers,
Craig
  #33  
Old August 16th 19, 06:18 AM posted to rec.aviation.soaring
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Default Tow plane types/mods for high density altitude glider towing

On Tuesday, August 13, 2019 at 11:38:43 AM UTC+10, son_of_flubber wrote:
What are your favorite aircraft types (and modifications) for glider towing in high density altitude and/or short runways?


Yes, there is a one and one half seater (single controls) has been converted, but remember the conversions are only of the existing aircraft. Aircraft are not being made from scratch.
Michael
  #34  
Old August 16th 19, 07:47 AM posted to rec.aviation.soaring
Per Carlin
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Default Tow plane types/mods for high density altitude glider towing

If you cant tow your glider behind a Turbo Čmelák, then shoud it not been towed at all

http://www.flugzeuginfo.net/acdata_p...ta_z37t_en.php
  #35  
Old August 16th 19, 09:30 PM posted to rec.aviation.soaring
George Underhill
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Default Tow plane types/mods for high density altitude glider towing

I saw a friend towed (pulled) aloft in a IS28b2 Lark by Steve Wolf in his 450hp Samson biplane at an airshow in Spokane, WA. It was an impressive climb angle, to say the least.
  #36  
Old August 22nd 19, 04:50 PM posted to rec.aviation.soaring
2G
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Default Tow plane types/mods for high density altitude glider towing

On Friday, August 16, 2019 at 1:30:50 PM UTC-7, George Underhill wrote:
I saw a friend towed (pulled) aloft in a IS28b2 Lark by Steve Wolf in his 450hp Samson biplane at an airshow in Spokane, WA. It was an impressive climb angle, to say the least.


I only consume 1/2 gallon to launch my ASH31Mi motorglider to 3kft (the same was true for the 26e and DG400, and most every other self-launcher that I can think of, well maybe not the Space Shuttle). So, for a 4 hour flight my "burn rate" is 1 pint per hour.

Tom
  #37  
Old August 23rd 19, 05:30 PM posted to rec.aviation.soaring
son_of_flubber
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Default Tow plane types/mods for high density altitude glider towing

On Thursday, August 22, 2019 at 11:50:40 AM UTC-4, 2G wrote:

I only consume 1/2 gallon to launch my ASH31Mi motorglider to 3kft (the same was true for the 26e and DG400, and most every other self-launcher that I can think of, well maybe not the Space Shuttle). So, for a 4 hour flight my "burn rate" is 1 pint per hour.


Self-launch gliders are obviously appealing, but I'm curious about their limitations wrt density altitude and turbulence.

What is your climb rate in your typical density altitude?

Do you ever launch in turbulent conditions with lots of sink?

What density altitude leads you to cancel your flight?

What is the highest density altitude that you have launched in?

  #38  
Old August 23rd 19, 05:41 PM posted to rec.aviation.soaring
Dan Marotta
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Default Tow plane types/mods for high density altitude glider towing

It's not the same with other self-launchers, of course, but my S10-VT
has a turbocharged, 4-cylinder engine rated at 115 (nominal)
horsepower.Â* With the turbo, it achieves its rated power to a very high
altitude, which I haven't seen stated, but it has a published service
ceiling of 33,000' MSL.Â* Density altitude has no effect on it other than
some reduction in propeller efficiency and engine temperature limits.Â* I
imagine the higher true airspeed for a given IAS at takeoff at high
altitude airports makes up for reductions in wing lift.Â* At maximum
power it burns around 5 gallons/hour (about 3.2 gph in cruise at 18,000'
MSL for repositioning flights), so I'd guess I burn less than a half
gallon of gas per normal soaring flight, including taxi and takeoff.

Engine overhaul will cost a few pennies more than with the smaller ships...

On 8/23/2019 10:30 AM, son_of_flubber wrote:
On Thursday, August 22, 2019 at 11:50:40 AM UTC-4, 2G wrote:

I only consume 1/2 gallon to launch my ASH31Mi motorglider to 3kft (the same was true for the 26e and DG400, and most every other self-launcher that I can think of, well maybe not the Space Shuttle). So, for a 4 hour flight my "burn rate" is 1 pint per hour.

Self-launch gliders are obviously appealing, but I'm curious about their limitations wrt density altitude and turbulence.

What is your climb rate in your typical density altitude?

Do you ever launch in turbulent conditions with lots of sink?

What density altitude leads you to cancel your flight?

What is the highest density altitude that you have launched in?


--
Dan, 5J
  #39  
Old August 24th 19, 02:47 AM posted to rec.aviation.soaring
son_of_flubber
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Default Tow plane types/mods for high density altitude glider towing

On Friday, August 23, 2019 at 12:30:29 PM UTC-4, son_of_flubber wrote:
On Thursday, August 22, 2019 at 11:50:40 AM UTC-4, 2G wrote:

I only consume 1/2 gallon to launch my ASH31Mi motorglider to 3kft (the same was true for the 26e and DG400, and most every other self-launcher that I can think of, well maybe not the Space Shuttle). So, for a 4 hour flight my "burn rate" is 1 pint per hour.


Self-launch gliders are obviously appealing, but I'm curious about their limitations wrt density altitude and turbulence.

What is your climb rate in your typical density altitude?

Do you ever launch in turbulent conditions with lots of sink?

What density altitude leads you to cancel your flight?

What is the highest density altitude that you have launched in?


Also...

How long is your runway? Is it level? Is it paved?
  #40  
Old August 26th 19, 04:29 AM posted to rec.aviation.soaring
2G
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Default Tow plane types/mods for high density altitude glider towing

On Friday, August 23, 2019 at 9:30:29 AM UTC-7, son_of_flubber wrote:
On Thursday, August 22, 2019 at 11:50:40 AM UTC-4, 2G wrote:

I only consume 1/2 gallon to launch my ASH31Mi motorglider to 3kft (the same was true for the 26e and DG400, and most every other self-launcher that I can think of, well maybe not the Space Shuttle). So, for a 4 hour flight my "burn rate" is 1 pint per hour.


Self-launch gliders are obviously appealing, but I'm curious about their limitations wrt density altitude and turbulence.

What is your climb rate in your typical density altitude?


At 2000 ft DA it is 500 ft/min; at 9000+ DA it is 300 ft/min. Always seeking lift, so this is mixed.


Do you ever launch in turbulent conditions with lots of sink?


Not with lots of sink - try to launch when there is lift.


What density altitude leads you to cancel your flight?


None.


What is the highest density altitude that you have launched in?


9600 ft.


 




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