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Author Topic: Blizzard E36  (Read 12888 times)
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airplay
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« Reply #100 on: May 07, 2016, 03:43:14 PM »

@ cvasecuk:
The powertrain now is APC 6/5.5, Emax Rs 2205/2600KV , 12 A no name ESC, Nanotech 300mAh 45-90. This combo climbs like a scalded cat! Way higher than the rest yesterday.
But my present Microlite covering is not up for the new speed and needs warp checking each launch. Which I did not last launch...
My next Blizzard is almost ready except for the wing.
I'm looking for an better airfoil and advice on Cubenfibre for covering (I have some 18g/m2) 
Jens     
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« Reply #101 on: May 08, 2016, 02:42:08 PM »

Congratulations Jens. Any chance that you'll join the E36 throng at Moncontour this year?

As for wing covering, although I've never used it, from what I've read Cuben is best used with carbon wings e.g carbon D box or rib caps. What will stiffen the wings without carbon is tissue over mylar, and the dope on the tissue hardly adds any weight. My power flying guru tells me that insufficiently stiff wings tend to flutter and wash out with faster climbs, in which case checking the wing before launch probably won't reveal anything. I'll let the Johns, O'Sullivan & Thompson provide a better explanation.

Regards

Peter
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JohnOSullivan
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« Reply #102 on: May 09, 2016, 08:42:01 AM »

I have not had any flutter problems with my Blizzards. Micafilm on the first and Ultracote light on others. I have not tried tissue over mylar although i have used it successfully on other models.
Geodetic structure is the answer.
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John O'Sullivan
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« Reply #103 on: June 08, 2016, 05:59:08 PM »

Further updates on my Blizzard: I went to Jutland last weekend for the danish championship and the big boys world cup.  And the weather was  incredible. Hot, gentle wind but tricky. In the F1S class only 6 competitors but mostly very experienced ones.
My model did well. Awesome climb with the hot cells and decent glide with the new tubulation. Until 4th round easy maxing....Then I returned in vain without my model for next round I was pleased to see it brought home by someone, but unhappy to see the broken tail boom. One F1B had crashed on my model while I were searching along the sheeps on the heath....
Quick CA'ing and some tape followed with a shortish test ... But 4. round went minus 4 sek due to immense stalling. Cured for 5. round.
So #2 in Danish Champs with 4 sek missing.
And Peter Buchwald (only clean card) won and told me he was happy not to meet me in an fly-off

I did test my new Blizzard the evening before the match and must say the cuben fiber 15g does not work. To day I received some Oralight from Germany and next outing will be Small Swedish Cup at Rinkaby. And you guys out there: It is still open for new competitors!
 
Still very pleased with the design...

Jens     
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« Reply #104 on: July 03, 2016, 03:37:02 PM »

Further updates on my Blizzard: I went to Jutland last weekend for the danish championship and the big boys world cup.  And the weather was  incredible. Hot, gentle wind but tricky. In the F1S class only 6 competitors but mostly very experienced ones.
My model did well. Awesome climb with the hot cells and decent glide with the new tubulation. Until 4th round easy maxing....Then I returned in vain without my model for next round I was pleased to see it brought home by someone, but unhappy to see the broken tail boom. One F1B had crashed on my model while I were searching along the sheeps on the heath....
Quick CA'ing and some tape followed with a shortish test ... But 4. round went minus 4 sek due to immense stalling. Cured for 5. round.
So #2 in Danish Champs with 4 sek missing.
And Peter Buchwald (only clean card) won and told me he was happy not to meet me in an fly-off

I did test my new Blizzard the evening before the match and must say the cuben fiber 15g does not work. To day I received some Oralight from Germany and next outing will be Small Swedish Cup at Rinkaby. And you guys out there: It is still open for new competitors!

Happy to see that Jens Placed second in the Danish  Championships and placed first in the Small Swedish Cup with my Blizzard design
 
 
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John O'Sullivan
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« Reply #105 on: October 16, 2016, 12:22:53 PM »

Just now watching John O'sullivan's reply, I have to replay that his design is one good start in F1S. Built after his drawings it is absolute safe and good performing. I attended 4 competitions this year and never went worse than second....  I think the design is found on Outerzone. Thanks John for a good start !
Jens.
 
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« Reply #106 on: February 13, 2017, 02:35:52 PM »

On my long journey with the Blizzard design, this day was special. Værløse Airbase ( now recreational area owned by The Danish Nature Agency) offered nice flying conditions. Sunny and low drifting conditions. About 0 C temp and some old dry snow.
My Blizzard #2 (AG 3 airfoil) at last broke the 100m barrier with one 103m reading (on 5 s) And some very close...
So now we are double up from where we started.
And how did this happen:
Emax RS 2205 2600Kv. Apc 6x5,5. HK Nano 300mAh heated in regulated box to 38C. Model covered with Oralight ( Ads good stiff wings)
My AUW is about 140g.

This could be a great season..

Jens
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PaulBrad
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« Reply #107 on: February 13, 2017, 10:25:37 PM »

Excellent results Jens. I sure am glad I am not flying against you and Tapio.

Paul Bradley
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Tapio Linkosalo
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« Reply #108 on: February 14, 2017, 12:51:50 AM »


Aw, the contest is on! Next I need a hotter motor and a battery heating box?! Interesting that you get this height with 300mAh battery - it seems good for 5 second motor run?

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« Reply #109 on: February 14, 2017, 04:10:57 PM »

@ Tapio: I find the 300mAh HK Nano ok for my models. For 10s it fades, but who needs 200m? Heating batteries according to yesterday's testing brought a gain about 20 m on 5s.(0 deg C conditions) Newly charged and heated, ctr ditto unheated.
Your motor is same league as mine, but I think my new airfoil offer less resistance at speed.  For its soaring abilities I have not much data except that 120s on 5s motoring looks safe .

Jens 
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« Reply #110 on: June 12, 2018, 05:08:33 PM »

Update on Blizzard F1S:

This weekend I went to Jutland for a 2 comps. Jutland heath Cup and Danish Cup the day after.
 
I flew Blizzard #2, almost standard from drawing but with slight changes. Airfoil AG 3 and cord +5mm. CG at 70%.( still same motors and batteries as later postings)
It went very well on saturday when almost everybody maxed all (5) rounds. But my timerswitch was faulty in the FO so I made 53 m (normally about 100) so I only made 124s against Mike Amtor, who maxed 180s in the 5s FO. But I did place second...
I did have one exiting 4, round. Launched into one big thermal and we lost sight after DT. On the last bearing it was found in time some km's out. The altimeter read 376m...

Sunday,  Danish Cup.
We only made 3 rounds in  the morning after a thunderstorm and before the rain.
But I won..

So the design are definitely still competitive! Build light and strong. Mine weights about 140g.

Jens

« Last Edit: June 12, 2018, 05:39:12 PM by airplay » Logged
JohnOSullivan
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« Reply #111 on: July 05, 2018, 12:18:33 PM »

I've been very impressed with Jens performance with the Blizzard. Looks like the AG section has improved the climb.
I am finishing a new wing Blizzard with 3/4" more chord. This increases wing area from 185 sq.in. to 212 sq. in  Tail moment and tail area are unchanged.
My two Blizzards are now fitted with DYS Fire Race series 2600 kV motors and AFRO 20 amp ESC.  I have also added RDT using a lemon receiver and Spectra radio. Timers are Dan's E36 timers.   Photo shows typical climb attitude.
This year has been slow for Free Flight in Nova Scotia due to windy late spring and vacations. 

I have however been very active in RC sailplane flying, both slope and flat land.
In addition I have designed a 2 metre RES (rudder/elev/spoiler) (MAYFLY) model based on the newly developed RES class developed on Germany. I have both pure and electric versions of this.  Also designed a 1 metre electric version of the MAYFLY as an indoor and light wind outdoor model.

Hopefully I can get back in the swing of this E 36 stuff over the next month or so.
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John O'Sullivan
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« Reply #112 on: July 07, 2018, 06:01:08 PM »

John,
I mostly think the AG3 airfoil soars a bit better... My first Blizzard climbs same level with same powertrain. This winter I provoked my usual training partner, Per, with a challenge with #2 : Best timed 3 starts 2,5 sec/ 120s. I maxed all in turbulent but not thermal air.  (3-4 m/s)(Blizzard#2) Climb with the Nano 300 mAh around 60-63m. Batteries at 38C.
One more thing. Do check your wings before each day on the field. The right wing wash-in is so important. The tip wash-out is may be less important.
One secret: I think the triangular tail boom is superior against the usual whippi carbon tubes. And just as leight. My complete Blizzard fuselage is about 17 g all inclusive.
Nice gliders. I share the same interest and have 2 model flying at moment.
Jens

And the Oland contest was cancelled this year too due to windy conditions, So I,m still reigning Swedish small Cup master somehow... But we had a nice trip with the caravan in wonderful Sweden. 
« Last Edit: July 07, 2018, 06:14:55 PM by airplay » Logged
Tapio Linkosalo
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« Reply #113 on: July 07, 2018, 11:39:22 PM »

And the Oland contest was cancelled this year too due to windy conditions, So I,m still reigning Swedish small Cup master somehow... But we had a nice trip with the caravan in wonderful Sweden. 

Sorry to hear that. Oland seems to be a challenging place weather-wise in June-July. Maybe we should try to fly the F1S competition in Finland on the frozen lake Pyhäjärvi at the weekend of Bear Cup and Swedish Moose Cup, in March? Both World Cup competitions, and also include F1Q. 
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« Reply #114 on: August 05, 2018, 02:44:43 PM »

Getting back into the swing of things with E 36. Completed the wings for Blizzard 3 yesterday. wing has 3/4" added to the chord giving another 27 sq. inches of area. No change in tail area or moment arm.  I am using (as Per is) the AG3 wing section.  Spar is quarter grain 3/32 balsa with 0.007 carbon capping top and bottom. This is spiral wrapped with  thin Kevlar strands (about 3/8" spacing) picked from some Kevlar tow.  This prevents carbon popping off spar.    leading edge is 3/32" basswood set in on the diagonal and trailing edge is 1/16x1/4 basswood. In spite if that the wing comes in at 34 gm which is 1 gm lighter than the Mk 2 Blizzard.
Motors on 2 and 3 are DYS Fire 2600 and Escs are 20 amp Afros. Timers are Dan's timers.  RC DT is fitted using Lemon receivers wired directly and operated by the gear channel on a Spektrum transmitter, A friend is preparing a simple transmitter from a stripped down Spektrum transmitter. I also have a direct drive from the motor battery to a Hobby King Altimeter

Hopefully I can get out flying within the next couple of weeks
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John O'Sullivan
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« Reply #115 on: August 18, 2018, 05:32:11 PM »

Interesting knowledge John.  To add something on your model I also skipped  the the geodesic (how to spell) wing structure on my  #2 Blizzard .With Oracover light it is ok.
My next models might be rather different but always will lean on your raw experience. Thanks for your sharing.
Jens
 
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