as are the FES batteries in current installs. 

> On 22 Sep 2016, at 9:21 AM, Future Aviation Pty. Ltd. 
> <ec...@internode.on.net> wrote:
> 
>> For me, I would rather stay with petrol in spite of the disadvantages,
>> because for me, well up on the list is the fact that battery
>> technology is changing much faster than 2 strokes and given the recent
>> posting on Schempp-Hirth spares, I would not be prepared to bank on
>> something which might be obsolete in 5 years.
> 
> Chris, this is precisely the reason why the ASG 32 El carries the battery 
> pack 
> in the engine bay! Including its steel container it weighs 68 kg but in this 
> location 
> it is easily accessible or exchangeable if ever a more advanced technology 
> becomes available in future. 
> 
> All competing electrically powered gliders carry the batteries in the wings. 
> It not 
> only limits the water carrying capacity (and presents problems during rigging 
> and 
> de-rigging) but it also requires wing modifications if ever a new battery 
> generation 
> comes along. The chances of that happening are very high indeed given that 
> the 
> car industry is presently investing many billions of dollars (or Euros) into 
> battery 
> research & development.
> 
> But that is only my opinion!
> 
> Kind regards to all!
> 
> Bernard  
> 
> 
>> On 22 Sep 2016, at 8:08 AM, DMcD <slutsw...@gmail.com> wrote:
>> 
>>>> How any performance chasing glider pilot can willingly accept a turbulent 
>>>> airflow over the entire  length of the fuselage will ever remain a mystery 
>>>> to me.
>> 
>> Yes. However there are many pilots who are not just chasing
>> performance at the expense of other factors. There are people who put
>> other factors above performance in the shopping list, such as
>> convenience and safety, long term maintenance and re-sale value.
>> 
>> And considering many of the performance claims of manufacturers and
>> their agents in the gliding world, a buyer could be forgiven for
>> making up his or her own mind about these factors.
>> 
>> A number of people on this list have expressed their desire to have no
>> more out landings. If this is top of the list, then an FES may be a
>> good way to go… on balance.
>> 
>> For me, I would rather stay with petrol in spite of the disadvantages,
>> because for me, well up on the list is the fact that battery
>> technology is changing much faster than 2 strokes and given the recent
>> posting on Schempp-Hirth spares, I would not be prepared to bank on
>> something which might be obsolete in 5 years.
>> 
>> Incidentally, the DG-400 has a system which elevates the propellor and
>> engine which relies (if that's the right word) on a small electric
>> motor which was originally a Bosch windscreen wiper motor. It runs
>> with a planetary gearbox so there are only light loads on the motor so
>> in a sense, the motor is adequate for the job.
>> 
>> The problem is that you cannot rely on something like a windscreen
>> wiper motor being manufactured for ever and the part was in time made
>> obsolete. Far be it from me to relate this to DG's wicked policy of
>> making users pay for maintenance manuals etc, but only a few years
>> ago, they certified a different, modern electric motor for fitting to
>> DG-400s. It's expensive but what would you rather have?
>> 
>> DG also certified a different coolant pump for early 800s which I
>> believe are also inside the paid maintenance contract area. I guess
>> this could have been fitted to a Ventus with a Solo engine too.
>> 
>> Long term availability of spares is a serious issue with powered
>> gliders and with my limited experience of electronics, I'll take old
>> petrol tech over power electronics and batteries for a while yet.
>> 
>> D
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