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-   -   CY Model Lavochkin LA-7 (http://www.rcuniverse.com/forum/rc-warbirds-warplanes-200/11635402-cy-model-lavochkin-la-7-a.html)

Hot Rod Todd 07-31-2017 04:36 AM

I don't have any special number or name. If you can get Krylon, the name is as I said. Here's a link to buy it at Walmart.com.

https://www.walmart.com/ip/Krylon-Co...&wl13=&veh=sem

warbird04 08-04-2017 12:07 PM

Thank you for the link...
You have got an incredible job, nice result, congratulation.
What is your final in flight weight?

Hot Rod Todd 08-04-2017 12:16 PM

2 Attachment(s)
I didn't weigh it, but it flies like it's pretty light. I'll have to lift it onto a scale sometime and see what the all-up weight is. I'd guess right around 31 lbs.

taildragger21 08-04-2017 01:05 PM

4 Attachment(s)
I'm really enjoying my Cy la7. The saito Fg84 flies it actually really well

warbird04 08-04-2017 11:28 PM

Ok Taildragger, can you give me more info about your LA? as the full in flight weight, the prop size and the rpm (read after 15 seconds at full throttle), is the Fg84 stock or modified, and what opening have you made to escape the hot air from the motor?
Thank you that will helps a lot.

taildragger21 08-05-2017 02:25 PM


Originally Posted by warbird04 (Post 12357629)
Ok Taildragger, can you give me more info about your LA? as the full in flight weight, the prop size and the rpm (read after 15 seconds at full throttle), is the Fg84 stock or modified, and what opening have you made to escape the hot air from the motor?
Thank you that will helps a lot.

Haven't weighed it. I'm kinda thinking like Todd in that it's probably 31 lbs or so. The fg84 is bone stock. It did run terrible with no transition until I switched from 6.6 a123 to 7.4 lipo on my ignition. Now the transition is good and top end is much better. Swinging a 24x10 fieala prop at around 6700 rpm. The cooling from the cowl exhaust is close to enough. I added a cooling louvre to the top of the cowl for more air exit for the top cylinder.
love this airplane

warbird04 08-05-2017 10:45 PM

Thanks for the infos...but I am surprised that nobody weight his airplane.... The weight of an airplaine is a important point, this is the power / weight factor that characterize an véhicle or airplane capacities.
But tell me, do you have add some weight in the nose for balancing? Do you have you make some vidéos on youtube?

Patrick R. 04-28-2019 04:18 PM

ARF'S are assembled. Kits and scratch built are builds....

racer-mech 09-07-2019 02:12 PM

Hello All, it's been great to read this thread. However, with the gear issue, did you guys change location only for scale appeal/appearance, or did you need to change the angle to prevent nose over?

Cheers

Patrick R. 09-07-2019 03:09 PM

racer-mech.

I have built the Dave Anderson design LA 7 his plan had the gear in the scale location and used Sierra retacts they were also pretty close in scale. Installed them with no modifications and not have had any problems with nose overs. Powered with a DA 100 had to put 4.25 lbs up front for balance..

n8622t 09-08-2019 10:21 AM

Some good shots of my La-7 and Ricks at the Indiana Warbird Campaign at Muncie last weekendhttps://cimg9.ibsrv.net/gimg/www.rcu...b359b7464a.pnghttps://cimg1.ibsrv.net/gimg/www.rcu...c0bb44e005.png

n8622t 09-08-2019 10:23 AM


n8622t 09-08-2019 10:25 AM


n8622t 09-08-2019 11:34 AM


Originally Posted by Patrick R. (Post 12521680)
ARF'S are assembled. Kits and scratch built are builds....

you obviously haven’t gone through this entire thread....some of the guys on this thread have totally redone this arf

racer-mech 09-08-2019 12:03 PM


Originally Posted by Patrick R. (Post 12548647)
racer-mech.

I have built the Dave Anderson design LA 7 his plan had the gear in the scale location and used Sierra retacts they were also pretty close in scale. Installed them with no modifications and not have had any problems with nose overs. Powered with a DA 100 had to put 4.25 lbs up front for balance..


Patrick, I appreciate your reply and have seen the awesome Dave Anderson LA-7, I however, have the CY models ARF. I've just got around to assembling it, and before I complete it, I'd rather change/alter/modify so that I don't have to repair a broken ship later. I was unclear on the mods/repairs that a couple of people have done on here. That being whether their mod/repair was done for aesthetics, or out of necessity for stopping nose overs.

Btw, you had to add 4.25lbs using a da 100!!??? Wow, I was planning on making mine a electric, so I guess I'll start looking for rocks and bricks to epoxy in the nose.

Patrick R. 09-08-2019 02:26 PM


Originally Posted by n8622t (Post 12548830)

you obviously haven’t gone through this entire thread....some of the guys on this thread have totally redone this arf

yes, I have read the entire thread twice. Just seems to me that if you want a scale bird build it. Trying to scale a out of scale arf doesn't seem worth it. Just my opinion of course.

Patrick R. 09-08-2019 02:31 PM


Originally Posted by n8622t (Post 12548830)

you obviously haven’t gone through this entire thread....some of the guys on this thread have totally redone this arf


Originally Posted by racer-mech (Post 12548834)
Patrick, I appreciate your reply and have seen the awesome Dave Anderson LA-7, I however, have the CY models ARF. I've just got around to assembling it, and before I complete it, I'd rather change/alter/modify so that I don't have to repair a broken ship later. I was unclear on the mods/repairs that a couple of people have done on here. That being whether their mod/repair was done for aesthetics, or out of necessity for stopping nose overs.

Btw, you had to add 4.25lbs using a da 100!!??? Wow, I was planning on making mine a electric, so I guess I'll start looking for rocks and bricks to epoxy in the nose.

yep, short nose and I should taken steps to lighten up the tail end as suggested by others who built that one but I didn't .

Austars 09-08-2019 05:26 PM

All good job guys! will pass your comments to CYmodels

Again, Thank you.

racer-mech 09-10-2019 05:55 AM

Has anyone else had nose over issues or other shortcomings with the CY LA-7? Issues that I can address before completing assembly?

Patrick, I'm already starting to look into pulling servo out of tail and relocating for lighter cg purposes. Definitely helpful if I do electric, but even I do gas, because I'll be using a dle 111.


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