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View Full Version : 7HV have I made a big mistake or just a little one?


blackcataps
06-26-2011, 12:53 PM
Hello all
I had a preorder placed for a 7HV but wasn't part of the first batch of kits with motor and blades but was offered a kit only and as I had a kontronik 700-520 motor and jive 80hv that were destined for a trex700 nitro conversion I never did I thought why not. Then all the excellent pictures started turning up but what now worries me is do the kit only come with the motor shaft bearing support block and pinion or no pinion but support block or neither??? Can those lucky 7hv owners who have already built there's see any reason for me to face problems or do you think it will be a easy build. Also if anyone does have a kit only did it come with a pinion or shaft support block?
Thanks

Rob43
06-26-2011, 05:48 PM
I for one think the build is pretty easy. As typical for me, I am sweating the details in favor of less trouble down the road...like for example, I made a mount for my Vbar controller to sit above the sensor on the gyro plate. I am also making a mount for the ESC which makes it fit up front with standoff distance to assist in cooling. I am planning to run an AR7100R, Hyperion phase sensor, a total of 3 antennae. Also running the WR Super BEC. Compared to my ultra-simple 6HV, where I used no receiver except 2 sats, no external BEC in favor of Kontronik 80HV with BEC, the 7HV has a lot more electronics to connect and set up.

The machine itself is very straight forward with nice features. It comes as typical for Compass about 80% preassembled. I took out all of the fastener to loctite everything for sure.

blackcataps
06-26-2011, 05:49 PM
Has anyone else bought a kit only? Judging by the feedback coming back about the included blades I'm feeling a little happier. Will be fitting egde 693 fbl blades or maybe 710's depending on people's opiinions to mine. Still would like to know if a pinion is included or not? Will any mod 1 pinion fit if not or does it need to be a particular sort of cut?
Cheers

blackcataps
06-26-2011, 05:57 PM
Thanks Rob. Do you foresee any problems with me fitting non stock motor? Kontronik 700-520 with a 6mm shaft. What shaft diameter does the compass motor have? I was concerned the stock motor came with built in shaft support but it appears it's part of the frame set so I should get that? I think? Not sure if I get compass pinion? Good luck with the rest of your build. One other thing where are the two six cell packs suggested to be placed in the manual and have you put yours there as the two sets of build photos I've seen have put their packs up front 6HV style due to the heli apparently being VERY tail heavy? Is it?
Thanks

JLH_1
06-26-2011, 07:04 PM
I mounted my kontronik 700-45 today you will use the 2 slots that are diagonal for the 4mm screws. You will need the long shaft. It fit just fine.

Hope this helps.

Jason Hunter

Cullen Colapietro
06-26-2011, 07:08 PM
Any flight reports comparing E Odin and 7HV yet JLH?

JLH_1
06-26-2011, 07:13 PM
I have only been able to hover the 7hv. Will be able to tell soon. It weighs a bit more than the odin. But I have never been comfortable throwing down with it like I do with my 6hv. It was the first 90 size I have had. Maybe its a size thing??

Jason

Rob43
06-26-2011, 10:32 PM
I mounter my kontronik 700-45 today you will use the 2 slots that are diagonal for the 4mm screws. You will need the long shaft. It fit just fine.

Hope this helps.

Jason Hunter


If this motor was able to fit, so would the 700-52, Mounting dimensions are the same.

sarpilot
06-27-2011, 12:08 AM
I mounter my kontronik 700-45 today you will use the 2 slots that are diagonal for the 4mm screws. You will need the long shaft. It fit just fine.

Hope this helps.

Jason Hunter
Awesome looking.... nice pic
;)

blackcataps
06-27-2011, 04:36 AM
I mounted my kontronik 700-45 today you will use the 2 slots that are diagonal for the 4mm screws. You will need the long shaft. It fit just fine.

Hope this helps.

Jason Hunter

Did you buy a kit complete with motor and just swap it out for the 700-45 or did you buy a kit only? What pinion have you fitted? Thank you very much for letting me know. I'm feeling much happier now. Especially now the feedback about the included blades suggests they are throw away's?

blackcataps
06-27-2011, 04:52 AM
If this motor was able to fit, so would the 700-52, Mounting dimensions are the same.

Thanks for that. I'm not sure if I have the standard length shaft or the longer? Could someone tell me the shaft length on either the compass motor or could JLH tell me the length of motor shaft on your 700-45 please?
Thanks

JLH_1
06-27-2011, 09:40 AM
My motor shaft is about 35mm long. It sticks out thru the counter bearing a bit. I had to make the shaft for the motor because It broke in a mishap. I bought the kit with motor esc and blades. I am trying out the Pyro motor. I am running a 14 tooth. 85% gov @2040 rpm. You should be able to use a 13 tooth and be within a good rpm range with a 520kv.

Jason

blackcataps
06-27-2011, 11:31 AM
I am trying out the Pyro motor. I am running a 14 tooth. 85% gov @2040 rpm. You should be able to use a 13 tooth and be within a good rpm range with a 520kv.

Jason

Thank you very much Jason. It appears my motor has the correct length shaft so all should be good IF I GET A KIT? I'm waiting for a reply from rc711 who said they had 7HV kits only so I had one but now show the kits out of stock and my order as pending. If they offered me a kit instead of waiting for backorder of kit/motor and blades and then sold out without keeping one back for me after I said I would have one I will not be happy. No fault of compass obviously and it's nice that this model seems to be selling well. I don't know about outside of the uk but there are very few 6HV where I fly and I don't know of many others elsewhere. Where is compass main target area and are there indications of sales of 7HV and preorders? Be interesting to know? There certainly seem to be a few on here.
Cheers

blackcataps
06-27-2011, 03:28 PM
I am running a 14 tooth. 85% gov @2040 rpm. You should be able to use a 13 tooth and be within a good rpm range with a 520kv.

Jason

Just looked back at your post and was wondering is 2040 not a little fast for such a big heli or is it about right for the 7HV? My only experience of a big electric is my logo 600SE so I don't consider myself very knowledgable and I know the logo does fly with a lower head speed as standard but close to 2100rpm seems quick? Or isn't it?
Thanks

zggy247
06-27-2011, 03:42 PM
blackcataps:
When did you place your order with RC711? I also ordered an airframe only kit from them yesterday. When I placed my order their website showed them in stock, today the kits are on backorder. Looking forward to the build and I'm planning on using either my Pyro 700-45 or an XERA 4030-3y motor.

Rob43
06-27-2011, 05:00 PM
I mounted my kontronik 700-45 today you will use the 2 slots that are diagonal for the 4mm screws. You will need the long shaft. It fit just fine.

Hope this helps.

Jason Hunter


Radix Blades in the pic as well as the Kontronik Pyro.

JLH_1
06-27-2011, 05:13 PM
With my history of my Odin 90E, I put the radix blades I have that have a ding on the tip. I have not tried the stock blades yet. I am saving them. I have several sets of different radix 710's and 690's. I was just being careful. I will try the compass 700's. All I have done so far is hover it. This weekend I will take her to the field. It was just a hell of a week with my hand getting operated on and stuff. 2040 RPM is around what the manual says. I have it set for 1800 and 2040.

I will post all info when I fly it at the field.

Jason Hunter

blackcataps
06-27-2011, 05:14 PM
blackcataps:
When did you place your order with RC711? I also ordered an airframe only kit from them yesterday. When I placed my order their website showed them in stock, today the kits are on backorder. Looking forward to the build and I'm planning on using either my Pyro 700-45 or an XERA 4030-3y motor.

Order was placed late Saturday night UK time so around 22.00 GMT. My order still saying pending. Yours????

Not used them before but I know lots who have and they not had many issues OTHER THAN they have a habit of over selling items and their stock levels not being in real time or so I'm told. We shall see? Pyro 700-45 a suberb bit of kit. I know because my logo 600SE is using one. Be interesting to compare the logo with the 7HV.

zggy247
06-27-2011, 07:35 PM
Order was placed late Saturday night UK time so around 22.00 GMT. My order still saying pending. Yours????

I placed my order Sunday afternoon and it also says pending. Will let you know if updates occur. Thanks!

blackcataps
06-28-2011, 03:32 AM
I placed my order Sunday afternoon and it also says pending. Will let you know if updates occur. Thanks!

I've emailed them twice about my order and I've yet to receive a reply which is odd because before I made my mind up to buy I asked two questions in two separate emails and received replies within 12 hours. Can't help feeling like they have my money now so they not so quick to reply? Especially when it's now fairly obvious to me that they have sold me a kit they don't have. I can't feel to disappointed though as long as I get it eventually as had they been showing stock of kits with motor and blades I may have ordered that and judging on the feedback about the blades and motors on here I may have dodged a bullet there as it seems some may end up having to replace both although if the motors are faulty you would like to think compass will rectify that situation. I will let you know when my order status changes and we can see if we both been sold kits that they don't have YET? :thumbdown:

zggy247
06-28-2011, 08:07 AM
Money was refunded this morning stating that some kits had to be returned because of a bad motor, they expect more in a couple of weeks. I cry :BSS, I didn't order a kit with a motor. At least I got my money back quickly. Oh well, guessing I'll have to wait a little longer.

blackcataps
06-29-2011, 04:49 AM
5 emails now and still no reply and kit still showing as pending! Not a happy chappy as I find a lot of things frustrating but no reply to emails is just plain rude! Come on RC711

blackcataps
06-29-2011, 04:58 PM
Have posted elsewhere but RC711 have now replied and the delay was due to waiting for compass to confirm what they wanted rc711 to do with their remaining undispatched kits and the official compass reply is send out no more kits from the first batch and await new stock to arrive. Something to do with quality control issues including but not just faulty blades,faulty motors and missing parts? I did ask if the kits without blades and motors would still be sent (this is what I had ordered) but apparently even these kits are not fault free due to missing items. Seems a shame compass seem to have spent a lot of time getting the heli right for there to be so many issues relating to quality control etc. At least they seem keen to resolve things. Now it's time for the waiting game again. They say 2 weeks for another kit but I reckon more like 5-6 weeks. We shall see.