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HomeAircraftHelicopterHIROBOHirobo Freya › Old Freya SST coming back to life
05-13-2011 03:09 AM  7 years agoPost 1
danny_isr

rrApprentice

Colorado

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Hi

I have a question regarding my old SST model.
I have one in great shape with few upgrades on it.
I didn't fly it for probably 3-4 years now .
I sold the engine as well (os91)

Anyhow I thought the other day to bring it back to life.
My question is this , can I still find parts for it in case of crash ?

Which engine should I get for it ? I saw OS have few new engines.

Will my SB 15 work with the newer OS engines ?
How about the gearing , is it still same as the 91SX ?

Thanks Dan

Freya SST 91,Trex450 SE,Trex 600E

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05-13-2011 03:58 AM  7 years agoPost 2
Dr.Ben

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Richmond, VA, USA

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Anyhow I thought the other day to bring it back to life.
My question is this , can I still find parts for it in case of crash ?

>> Yes. The Freya Evo parts retrofit all the main mechanic parts. Head parts are still out there too.

Which engine should I get for it ? I saw OS have few new engines.

>>OS 91 HZR or YS91 3DS on 11/91 or 12/95 gearing (latter more for FAI style) would both work fine.

Will my SB 15 work with the newer OS engines ?
How about the gearing , is it still same as the 91SX ?

>>Gearing notes above. The SB-15 is not an ideal choice for those listed engines. You'd need something more along the lines of an SB-19 for the YS or SB-20 for the OS.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-13-2011 05:36 AM  7 years agoPost 3
pepenk

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Jakarta, Indonesia

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Or,

Convert it to electric power so you will not bothered by the muffler choice. I'm sure Ben could give you the best solution also.

Regards,
Ferri
INA 0083

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05-13-2011 08:19 AM  7 years agoPost 4
Dr.Ben

rrMaster

Richmond, VA, USA

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Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-13-2011 02:48 PM  7 years agoPost 5
payne1967

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uk

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its time to stop typing
and fit the freya out and go flying

and in the uk parts aren't a problem with the sst freya

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05-13-2011 05:28 PM  7 years agoPost 6
Ace4

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Chandler, AZ

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Parts are still available, ronlund/heliproz/etc usually have one or two of each part in stock. I've had my Freya 90 for about 8 years now (took a break from flying for 3 of those years), and most recently rebuilt it from a bad crash about 8 months ago and had no trouble finding parts.

Although I do think it is time for me to move on to something electric finally.

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05-13-2011 05:59 PM  7 years agoPost 7
danny_isr

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Colorado

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Regarding gearing it has the same gearing I used with the OS91 with the delrin gear. (used the upgrade kit from MRC 60 to 90).

What's involved with converting to electric (work wise and money wise) ?

if its kind of close to glow price I may consider. But if it's 2x or 3x then I will probably get a new OS .

Thanks for your replies !

Freya SST 91,Trex450 SE,Trex 600E

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05-24-2011 04:11 AM  7 years agoPost 8
danny_isr

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Colorado

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Any ball park numbers for electric conversion ?

Freya SST 91,Trex450 SE,Trex 600E

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05-24-2011 07:18 AM  7 years agoPost 9
pepenk

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Jakarta, Indonesia

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Get 500 kV motor and use it with 95t main and 10T pinion gear.
Or
Get 450 kV motor and use it with 93T main and 11T pinion gear.

Hope this helps.

Regards,
Ferri
INA 0083

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05-24-2011 05:56 PM  7 years agoPost 10
Dr.Ben

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Richmond, VA, USA

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Nah......95/11 on 450 kV or even 93/10. I have 11/97 on 450 in my EXII, and that's still too much headroom. 93/11 would have obscene power and force you to run too high a headspeed in order to keep efficiency up.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-24-2011 07:19 PM  7 years agoPost 11
BigDaddyD

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Mount Pocono, PA USA

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I see Gordie uses a 91/10 on 470kv. Has anyone else tried this?

Fear None......Respect All

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05-25-2011 01:45 AM  7 years agoPost 12
danny_isr

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Colorado

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Ha I was actually talking more about price numbers ....

How much It will cost me for a motor speed control two batteries
Do I need anything else ? Any new parts for mounting the motor ?

Thanks Dan

Freya SST 91,Trex450 SE,Trex 600E

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05-25-2011 02:17 AM  7 years agoPost 13
pepenk

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Jakarta, Indonesia

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Yes Ben, I'm now running at 1500 rpm on hover and 2000 upstairs.
It seems to be the most efficient set up for me now.
For complete FAI schedule P it only consumed 75% of TP 5000 mAh battery capacity.

Regards,
Ferri
INA 0083

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05-25-2011 03:43 AM  7 years agoPost 14
Dr.Ben

rrMaster

Richmond, VA, USA

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Ferri,

Which combo, 500 kV 95/10? I'm sure that is working well. How are the gears holding up with the 10T pinion?

Gordie initially used 9.1:1 but switched to 9.3 after the logger info showed he could afford to lose a little headroom.

As for prices, decent motors can be had for $180-$250 or so.

ESC's are in the $200 or $400 range depending on whether you go the Castle Creations or Kontroniks route.

Entirely workable Turnigy packs are $70'ish/pack. Voltz packs are a little over $100/pack. Either are good for well over 100 cycles with due care and no abuse. It's well under the cost/flight for 30% nitro.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-25-2011 05:06 AM  7 years agoPost 15
danny_isr

rrApprentice

Colorado

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Hmmm interesting , how about average flights time and power compares to nitro 30% on a good 91

Freya SST 91,Trex450 SE,Trex 600E

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05-26-2011 04:12 AM  7 years agoPost 16
pepenk

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Jakarta, Indonesia

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Dear Ben,

That's for 450kV and 93/11 combo.
For 500kV and 95/10 combo, I'm still use 1480rpm in hover and 1980rpm upstairs.

Both seems to consumed, more or less, about 75% of battery capacity for complete f3C P schedule. Batteries are TP 12S, 5000 mAh.

I'm now using pinion gear from Hirobo electric E3 conversion kit. Until now they works flawlessly. I even set up for my friend with 530kV and 97/9 combo. This combo also works well with no issues of gear stripping. However gives lower operating speed, 1450rpm hover and 1830rpm upstairs using set rpm of CC ICE 120.

Dear Danny,

Average flight time about 10 minutes mix flight of hovering and upstairs. Bear in mind that I only fly FAI schedule.
Power is huge. Way way more powerful that 91 engine with 30% nitro.

Regards,
Ferri
INA 0083

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05-26-2011 05:50 AM  7 years agoPost 17
danny_isr

rrApprentice

Colorado

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Looks like going electric will cost me around $1000 for
Motor ,esc ,two packs of 2 x 6cells , charger.
On top of that I may need a car battery and maybe some parts for th conversion ?

Or I can go with a HZR with SB20 for $600. 400 diffrence.

$400 in glow gas is 13 galons ....about 110 flights

If those batteries are good for 100 flights.
Baterreis are $280 for two packs of the Turnigy ...sounds to me
Glow and baterreis are close in price.(30% for $30)

Glow 100 flight - less then $400 , electric 300-400 depends on the brand.
Am I missing something here ?

Freya SST 91,Trex450 SE,Trex 600E

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05-26-2011 11:51 AM  7 years agoPost 18
pepenk

rrApprentice

Jakarta, Indonesia

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Yes Danny, you miss:

1. More power
2. Hassle free power set up when you fly in different field or altitude.
3. Cost of glow plug and glow heater battery.
4. Etc

Thanks my own thought.

Regards,
Ferri
INA 0083

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05-26-2011 03:03 PM  7 years agoPost 19
danny_isr

rrApprentice

Colorado

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Oh yeah I'm aware of the electrics benefits , I fly a Trex 450 myself . I was just talking price wise ...

Glow plugs cost is minimal and I had to replace them rarely on my 91SX and 61WC back at the time.
I already have a field box with battery , pump etc .

Don't get me wrong , I'm very tempted to do this e conversation .
I just don't want find a surprise later on

How about parts to convert the glow engine mounts to electric ?

Freya SST 91,Trex450 SE,Trex 600E

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