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Goblin 380 › Goblin 420
10-23-2016 10:46 PM  11 months agoPost 1
IFHELI

rrApprentice

Woonsocket,RI

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I finished building my G420 today. The build went great except for two problems. I had a bad bearing in one main grip. When the head was assembled one grip felt gritty. I swapped out bearing for a good one I had on hand. Then when screwing the ball into plastic tail lever it never tighten. So i swapped lever out for a good one. Other than this all was good. I also swapped out main gear to metal since I had one on hand to try out. I also installed a lynx swash plate.
I can not wait to fly it. Today was just to windy for some testing.

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10-24-2016 09:59 PM  10 months agoPost 2
Kevin Dalrymple

rrKey Veteran

Indianapolis

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Heli looks good. Thanks for sharing and the pics.

Synergy Field Rep Rail Blades Field Rep

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10-25-2016 09:05 PM  10 months agoPost 3
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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I dig it bro. What ESC are you using?

Lou

Just give me five dudes and two flashbangs...

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10-25-2016 09:08 PM  10 months agoPost 4
IFHELI

rrApprentice

Woonsocket,RI

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I have a Hobby Wing 100A V3 ESC in it.

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10-25-2016 09:28 PM  10 months agoPost 5
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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Cool. I look forward to hearing about the maiden :-) cheers bro.

Lou

Just give me five dudes and two flashbangs...

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10-26-2016 11:20 AM  10 months agoPost 6
djtommyboy

rrNovice

Cherry Hill

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NICE! Mine arrives today! Cant wait to build it

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10-28-2016 10:12 PM  10 months agoPost 7
IFHELI

rrApprentice

Woonsocket,RI

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Since the weather and work has gotten in the way of flying the G420 all week, tomorrow may be the day I get out with it. I have ran two batteries through it in my tight test flight area. When I say tight I mean really small. All I can do is hover and stationary aerobatics. I love the feel of it. I ran a 1800mah and a 2600mah. With 1800mah it did drift backwards in a hover. With 2600mah it stayed in place even though the day was windy.

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10-28-2016 10:23 PM  10 months agoPost 8
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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Good to hear :-) Makes more sense the heavier battery would balance the longer tail better. Look forward to hearing about it more!

Lou

Just give me five dudes and two flashbangs...

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10-29-2016 09:07 PM  10 months agoPost 9
IFHELI

rrApprentice

Woonsocket,RI

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I made four easy flights today. I`m liking this heli. I have the XNova 930 motor w/ 20T and HW 100A esc in it. I`m using the ESC governor set to 75,80,85,& 90. I still have not really let it rip around the sky yet. I`m not sure what the HS is yet.I have not tached it yet. I have been flying it mostly at 90%. So I may be throwing a 21T pinion in it but for now I what to get some more flights on it.

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11-03-2016 11:35 AM  10 months agoPost 10
djtommyboy

rrNovice

Cherry Hill

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Flew my maiden today.. LOVE this heli!

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11-06-2016 12:41 PM  10 months agoPost 11
IFHELI

rrApprentice

Woonsocket,RI

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I have stretched one of My 380s. I`m just waiting on blades. The 420 boom looks good with Coco canopy.

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11-06-2016 12:46 PM  10 months agoPost 12
fla heli boy

rrKey Veteran

cape coral, florida

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hmmm.... as easy as a 420 boom, belt, pushrod and blades then???

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11-06-2016 04:12 PM  10 months agoPost 13
IFHELI

rrApprentice

Woonsocket,RI

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You will also need the 20T tail pulley and 80T front tail drive gear.

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11-07-2016 05:31 PM  10 months agoPost 14
crunch

rrApprentice

Peterborough, England

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Hi
What size packs are you running on the 420?
What head speeds you running on them?
What fight time are you getting?
Cheers Paul

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11-07-2016 09:41 PM  10 months agoPost 15
IFHELI

rrApprentice

Woonsocket,RI

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What size packs are you running on the 420?
Pulse 2600 mah and 1800mah

What head speeds you running on them?
I honestly could not tell you. I fly alone and have not tached it. I would assume it is between 3200-3250 going off of Mr. MEL head speed calculator. I have the HW 100A ESC and Xnova 930 w/ 20T pinion. I`m using the internal gov. in ESC and TC`s @ 85%,80%,& 75%

The one I stretched from a 380 has 1000kv motor w/ 21T pinion and HW 80A V4 ESC. I have not flown this one yet because I`m waiting on the 420 blades. I want more head speed on this one but if I`m not happy with it I will be dropping to a 20T pinion.

What fight time are you getting?
I`m at about 4:00 on 2600. I have not pushed the 1800`s past 2:45.

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11-08-2016 06:39 PM  10 months agoPost 16
crunch

rrApprentice

Peterborough, England

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Thanks for your reply.

was thinking of 420 conversion but can't cope with low flight times,
As I only have 1800 packs.

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11-13-2016 12:49 PM  10 months agoPost 17
IFHELI

rrApprentice

Woonsocket,RI

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The G420 flies well at low head speed. I flew a flight at 75% TC w/ Xnova 930 w/ 20T pinion. Mr. MEl HS calculator said HS close to 2860. I fly alone so hard to tach but I know it was close to it. It is not a powerhouse but flew fine. I flew for 4:00 and took 1360mah out of a 2600mah battery. So on a 1800mah a little over four minutes I would say. I know everyone flying style can be different so flight time can vary.

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11-14-2016 03:47 PM  10 months agoPost 18
djtommyboy

rrNovice

Cherry Hill

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I just got the MRMel Headspeed calc. How do you determine the Goblin info because its a 2 stage transmission? Grrrrr

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11-14-2016 04:09 PM  10 months agoPost 19
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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On page 14 of the manual it tells you to use 120t as the main gear tooth count for use with a head speed calculator.

Lou

Just give me five dudes and two flashbangs...

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11-16-2016 01:43 AM  10 months agoPost 20
djtommyboy

rrNovice

Cherry Hill

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thanks!

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Goblin 380 › Goblin 420
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